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Byker, Holly P., Nader Soltani, Darren E. Robinson, François J. Tardif, Mark B. Lawton, and Peter H. Sikkema. "Occurrence of glyphosate and cloransulam resistant Canada fleabane (Conyza canadensis L. Cronq.) in Ontario." Canadian Journal of Plant Science 93, no. 5 (2013): 851–55. http://dx.doi.org/10.4141/cjps2013-039.
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Byker, H. P., Soltani, N., Robinson, D. E., Tardif, F. J., Lawton, M. B. and Sikkema, P. H. 2013. Occurrence of glyphosate and cloransulam resistant Canada fleabane ( Conyza canadensis L. Cronq.) in Ontario. Can. J. Plant Sci. 93: 851–855. Canada fleabane is the second documented glyphosate-resistant (GR) weed species in Ontario, Canada. In 2010, the first eight GR Canada fleabane populations were identified in Essex County. In 2011 and 2012, an expanded survey was conducted to identify the occurrence of GR and cloransulam-resistant populations in Ontario. Seed was collected from field weed escapes in the early fall and sprayed in the greenhouse with 900 g a.e. ha−1 of glyphosate at the 10-cm rosette stage. Ninety-three and 54 additional sites were confirmed in 2011 and 2012, respectively. There are now 155 sites with confirmed GR Canada fleabane in Ontario in the counties of Elgin, Essex, Haldimand, Huron, Kent, Lambton, Middlesex, and Niagara region. Twelve and seven sites were identified with multiple resistant Canada fleabane (glyphosate and cloransulam) in 2011 and 2012, respectively in Elgin, Essex, Kent, Lambton, and Middlesex counties. This is the first survey documenting the occurrence of glyphosate-resistant and multiple resistant (glyphosate and cloransulam) Canada fleabane in Ontario and its distribution.
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Van Wely, Annemarie C., Nadar Soltani, Darren E. Robinson, David C. Hooker, Mark B. Lawton, and Peter H. Sikkema. "Glyphosate and acetolactate synthase inhibitor resistant common ragweed (Ambrosia artemisiifolia L.) in southwestern Ontario." Canadian Journal of Plant Science 95, no. 2 (2015): 335–38. http://dx.doi.org/10.4141/cjps-2014-290.
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Van Wely, A. C., Soltani, N., Robinson, D. E., Hooker, D. C., Lawton, M. B. and Sikkema, P. H. 2015. Glyphosate and acetolactate synthase inhibitor resistant common ragweed (Ambrosia artemisiifolia L.) in southwestern Ontario. Can. J. Plant Sci. 95: 335–338. Common ragweed (Ambrosia artemisiifolia L.) was found to be resistant to glyphosate in Ontario. Field surveys were conducted from 2011 to 2013 to determine the distribution of glyphosate-resistant (GR) and acetolactate synthase inhibitor resistant common ragweed. GR common ragweed was confirmed in Essex County. All GR populations were found to be resistant to acetolactate synthase-inhibiting herbicides.
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Keinath, A. P., W. P. Wechter, and J. P. Smith. "First Report of Bacterial Leaf Spot on Leafy Brassica Greens Caused by Pseudomonas syringae pv. maculicola in South Carolina." Plant Disease 90, no. 5 (2006): 683. http://dx.doi.org/10.1094/pd-90-0683c.
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As of 2001, South Carolina ranked second in the United States in acreage of turnip greens (Brassica rapa) and collard (B. oleracea) and third in acreage of mustard (B. juncea). In June 2001, a leaf disease was found on turnip greens (cv. Alamo), mustard (cvs. Southern Giant Curled and Florida Broadleaf), and rape salad greens (B. napus var. napus cv. Essex) on a commercial farm in Lexington County, South Carolina. Symptoms appeared after a heavy rainstorm that included blowing sand. The disease was found in May and June 2002 on three additional farms in the same county on turnip greens cv. Topper and Royal Crown and collard cv. Top Bunch. Symptoms included small tan spots, water soaking, yellowing, and brown necrosis of leaves after spots coalesced on the lower halves of plants. Yellowing was more prevalent on older than on younger leaves. Leaf samples were collected in 2001 and 2002 from the affected hosts on the four farms. Bacterial streaming was evident from these samples and 27 strains were isolated on nutrient agar or King's medium B (KMB). All strains were gram negative and fluoresced bluegreen or yellow under UV light after 48-h growth at 28°C on Pseudomonas agar F (PAF). On the basis of LOPAT tests, the strains were identified as P. syringae (2). All 27 strains were tested for pathogenicity to rape salad greens cv. Essex and then to turnip greens cv. Topper. Plants were grown in peat-vermiculite potting mix in 10-cm-diameter pots in a greenhouse. P. syringae pv. maculicola F41, isolated from turnip in Oklahoma, and P. syringae pv. tomato F33, isolated from tomato in Oklahoma, were included as positive and negative controls along with a noninoculated control. Bacteria were grown on KMB for 48 h at 24°C, and bacterial suspensions were prepared and adjusted to 0.1 optical density at 600 nm. Three-week-old plants were held at 95 to 100% relative humidity (RH) for 48 h before they were sprayed just to runoff with inoculum and then held at 95 to 100% RH for 48 h after inoculation (4). After an additional 5 to 8 days in a greenhouse, nine strains and F41 caused symptoms on both Topper and Essex similar to symptoms observed in the field. No symptoms were observed on noninoculated plants or plants inoculated with F33. On the basis of repetitive sequence-based polymerase chain reactions with the BOXA1R primer, the DNA fingerprint of each of the nine pathogenic strains from South Carolina was nearly identical to that of F41. Bacteria isolated from inoculated, symptomatic turnip leaves had identical LOPAT and BOXA1R profiles to the corresponding original strains. Pathogenic strains had bluegreen fluorescence on PAF, whereas nonpathogenic strains fluoresced yellow. Five pathogenic strains, as well as F41, were further identified to species and pathovar with fatty acid methyl ester profiles as P. syringae pv. maculicola. To our knowledge, this is the first report of P. syringae pv. maculicola from South Carolina. Over the past 10 years, P. syringae pv. maculicola has been found in Oklahoma (4), California (1), and Ohio (3). Bacterial leaf spot has occurred yearly in South Carolina since the initial outbreaks. Currently, it is the disease that causes the greatest yield losses of leafy brassica greens in the state. References: (1) N. A. Cintas et al. Plant Dis. 85:1207, 2001. (2) R. A. Lelliott et al. J. Appl. Bacteriol. 29:470, 1966. (3) M. L. Lewis Ivey et al. Plant Dis. 86:186, 2002. (4) Y. F. Zhao et al. Plant Dis. 84:1015, 2000.
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Sikora, E. J., and J. F. Murphy. "First Report of Bean pod mottle virus in Soybean in Alabama." Plant Disease 89, no. 1 (2005): 108. http://dx.doi.org/10.1094/pd-89-0108b.
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During October 2003, soybean (Glycine max (L.) Merr.) plants showing symptoms of delayed maturity of stems, or green stem, were observed in a soybean cultivar trial on Dee River Ranch in Pickens County, Alabama. Symptoms were characteristic of those caused by Bean pod mottle virus (BPMV). BPMV infections have been identified in other southern states, including Arkansas, Louisiana, and neighboring Mississippi, but had not yet been identified in Alabama (1,2,3). In this study, a cultivar trial was established as a nonreplicated strip test to evaluate the performance of nongenetically modified soybean cultivars in high-pH soils. The trial consisted of 12 maturity group V cultivars planted side by side in 24-row plots approximately 1 km long. The cultivars consisted of Anand, Asgrow 5547, Asgrow 5944, Delta King 5995, Deltapine 4748, Deltapine 5110, Deltapine 5989, Essex, Hutcheson, Pioneer 9594, Pioneer 9597, and USG5601T. During the season, a known vector of BPMV, the bean leaf beetle (Cerotoma trifurcate Forster), was identified in the plots (4). On 10 October, the majority of plants in the trial had senesced; however, it was observed that plants of 6 of the 12 cultivars were showing symptoms of green stem typical of BPMV infection. A visual assessment was taken to determine incidence of green stem for Asgrow 5547, Delta King 5995, Deltapine 5110, Deltapine 5989, Pioneer 9594, and USG5601T. Incidence between 1 and 5% was observed for Delta King 5995, Deltapine 5989, and Pioneer 9594. Incidence of less than 1% was observed for Asgrow 5547, Deltapine 5110, and USG5601T. Twenty soybean plants showing symptoms of green stem and retaining green leaves were sampled from each of the six cultivars by collecting one trifoliate leaf near the top of the plant. All samples were tested for BPMV using double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) according to the manufacturer's instructions (Agdia, Inc., Elkart, IN). BPMV was detected in 30% of Deltapine 5989, 10% of Delta King 5995, and 45% of Pioneer 9594 plants. BPMV was not detected in Asgrow 5547, Deltapine 5110, and USG5601T. Ten of the samples shown to be infected with BPMV using DAS-ELISA were mechanically transferred to soybean seedlings in the greenhouse. These plants developed systemic mottle symptoms typical of those caused by BPMV and tested positive for the virus BPMV using DAS-ELISA. To our knowledge, this is the first report of BPMV in Alabama. References: (1) N. S. Horn et al. LA. Agric. 13:12, 1970. (2) H. N. Pitre et al. Plant Dis. Rep. 63:419, 1979. (3) J. P. Ross. Plant Dis. Rep. 47:1049, 1963. (4) H. J. Walters. (Abstr.) Phytopathology 48:346, 1958.
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Janick, Herbert, Stephen S. Gosch, Donn C. Neal, et al. "Book Reviews." Teaching History: A Journal of Methods 14, no. 2 (1989): 85–104. http://dx.doi.org/10.33043/th.14.2.85-104.
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Anthony Esler. The Human Venture. Englewood Cliffs, NJ: Prentice-Hall, 1986. Volume I: The Great Enterprise, a World History to 1500. Pp. xii, 340. Volume II: The Globe Encompassed, A World History since 1500. Pp. xii, 399. Paper, $20.95 each. Review by Teddy J. Uldricks of the University of North Carolina at Asheville. H. Stuart Hughes and James Wilkinson. Contemporary Europe: A History. Englewood Clifffs, NJ: Prentice-Hall, 1987. Sixth edition. Pp. xiii, 615. Cloth, $35.33. Review by Harry E. Wade of East Texas State University. Ellen K. Rothman. Hands and Hearts: A History of Courtship in America. Cambridge and London: Harvard University Press, 1987. Pp. xi, 370. Paper, $8.95. Review by Mary Jane Capozzoli of Warren County Community College. Bernard Lewis, ed. Islam: from the Prophet Muhammad to the Capture of Constantinople. Oxford and New York: Oxford University Press, 1987. Volume I: Politics and War. Pp.xxxvii, 226. Paper, $9.95. Volume II: Religion and Society. Pp. xxxix, 310. Paper, $10.95. Review by Calvin H. Allen, Jr. of The School of the Ozarks. Michael Stanford. The Nature of Historical Knowledge. New York: Basil Blackwell, 1986. Pp. vii, 196. Cloth, $45.00; paper, $14.95. Review by Michael J. Salevouris of Webster University. David Stricklin and Rebecca Sharpless, eds. The Past Meets The Present: Essays On Oral History. Lanham, MD: University Press of America, 1988. Pp. 151. Paper, $11.50. Review by Jacob L. Susskind of The Pennsylvania State University. Peter N. Stearns. World History: Patterns of Change and Continuity. New York: Harper and row, 1987. Pp. viii, 598. Paper, $27.00; Theodore H. Von Laue. The World Revolution of Westernization: The Twentieth Century in Global Perspective. New York: Oxford University Press, 1987. Pp. xx, 396. Cloth, $24.95. Review by Jayme A. Sokolow of the National Endowment for the Humanities. Marilyn J. Boxer and Jean R Quataert, eds. Connecting Spheres: Women in the Western World, 1500 to the Present. New York and Oxford: Oxford University Press, 1987. Pp. xvii, 281. Cloth, $29.95; Paper, $10.95. Review by Samuel E. Dicks of Emporia State University. Dietrich Orlow. A History of Modern Germany: 1870 to Present. Englewood Cliffs, NJ: Prentice-Hall, Inc., 1987. Pp. xi, 371. Paper, $24.33. Review by Gordon R. Mork of Purdue University. Gail Braybon and Penny Summerfield. Out of the Cage: Women's Experiences in Two World Wars. Pandora: London and New York, 1987. Pp. xiii, 330. Paper, $14.95. Review by Paul E. Fuller of Transylvania University. Moshe Lewin. The Gorbachev Phenomenon: A Historical Interpretation. Berkeley and Los Angeles: University of California Press, 1988. Pp. xii, 176. Cloth, $16.95; David A. Dyker, ed. The Soviet Union Under Gorbachev: Prospects for Reform. London & New York: Croom Helm, 1987. Pp. 227. Cloth, $35.00. Review by Elizabeth J. Wilcoxson of Northern Essex Community College. Charles D. Smith, Palestine and the Arab-Israeli Conflict. New York: St. Martin's Press, 1988. Pp. viii, 308. Cloth, $35.00. Review by Arthur Q. Larson of Westmar College. Stephen G. Rabe. Eisenhower and Latin America: The Foreign Policy of Anticommunism. Chapel Hill & London: The University of North Carolina Press, 1988. Pp. 237. Cloth $29.95; paper, $9.95. Review by Donald J. Mabry of Mississippi State University. Earl Black and Merle Black. Politics and Society in the South. Cambridge and London: Harvard University Press, 1987. Pp. ix, 363. Cloth, $25.00. Review by Donn C. Neal of the Society of American Archivists. The Lessons of the Vietnam War: A Modular Textbook. Pittsburgh: Center for Social Studies Education, 1988. Teacher edition (includes 64-page Teacher's Manual and twelve curricular units of 31-32 pages each), $39.95; student edition, $34.95; individual units, $3.00 each. Order from Center for Social Studies Education, 115 Mayfair Drive, Pittsburgh, PA 15228. Review by Stephen S. Gosch of the University of Wisconsin-Eau Claire. Media Reviews Carol Kammen. On Doing Local History. Videotape (VIIS). 45 minutes. Presented at SUNY-Brockport's Institute of Local Studies First Annual Symposium, September 1987. $29.95 prepaid. (Order from: Dr. Ronald W. Herlan, Director, Institute of Local Studies, Room 180, Faculty Office Bldg., SUNY-Brockport. Brockport. NY 14420.) Review by Herbert Janick of Western Connecticut State University.
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KURLYCHEK, MEGAN C., SHAWN D. BUSHWAY, and ROBERT BRAME. "LONG-TERM CRIME DESISTANCE AND RECIDIVISM PATTERNS-EVIDENCE FROM THE ESSEX COUNTY CONVICTED FELON STUDY*." Criminology 50, no. 1 (2012): 71–103. http://dx.doi.org/10.1111/j.1745-9125.2011.00259.x.
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Michelutti, R., J. C. Tu, D. W. A. Hunt, et al. "First Report of Bean pod mottle virus in Soybean in Canada." Plant Disease 86, no. 3 (2002): 330. http://dx.doi.org/10.1094/pdis.2002.86.3.330a.
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In 2001, soybean fields were surveyed to determine the incidence of viruses because soybean aphids (Aphis glycines Matsamura), known to transmit Soybean mosaic virus (SMV) (2), were found in Ontario. In addition, bean leaf beetle (Cerotoma trifurcata Forster) was found during 2000 to be contaminated with Bean pod mottle virus (BPMV), although soybean plants, on which the beetles were feeding, tested negative (3). In the current survey, young soybean leaves were selected at random in July and August from 20 plants per site at growth stages R4 to R5 (1) from 415 sites representing the entire soybean-producing area in Ontario. Samples were maintained under cool conditions until received at the laboratory, where they were promptly processed. A combined sub-sample was obtained from the 20 plants per site. The 415 sub-samples were tested for SMV, BPMV, Tobacco ringspot virus (TRSV), and Tobacco streak virus (TSV) using polyclonal antibody kits for double-antibody sandwich enzyme-linked immunosorbent assay (DAS-ELISA) (Agdia Inc., Elkart, IN). The ELISA plates were read with a plate reader (MRX, Dynex Technologies Inc., Chantilly, VA), and results were analyzed using ELISA software (Leading Edge Research, Merrickville, Ontario) and compared positive and negative controls (Agdia). TRSV was detected in one sample from Essex County and another sample from Middlesex County. SMV, BPMV, and TSV were not found in commercial soybean fields. However, SMV and BPMV were found in samples originating from two soybean breeding nurseries, one in Essex County and one in Kent County. Seedlings of soybean cv. Williams 82 were inoculated in the greenhouse with sap from leaf samples that tested positive for BPMV. Leaves of plants that developed mosaic symptoms were retested using ELISA and confirmed to be positive for BPMV. SMV and TRSV have been found previously in commercial soybean fields in Ontario (4). To our knowledge, this is the first report of BPMV on soybean plants in Canada. References: (1) W. R. Fehr et al. Merr. Crop. Sci. 11:929, 1971. (2) J. H. Hill et al. Plant Dis. 85:561, 2001. (3) A. U. Tenuta. Crop Pest. 5 (11):8, 2000. (4) J. C. Tu. Can. J. Plant Sci. 66:491, 1986.
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Overill, Ralph. "Exiled in the present: The last Cyberman walks in Rettendon." JAWS: Journal of Arts Writing by Students 7, no. 1 (2022): 83–96. http://dx.doi.org/10.1386/jaws_00032_1.
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The author introduces, presents and considers a recent experiment that saw him walk to the location of the 1995 Essex Range Rover murders while dressed as a character he has created, ‘the last Cyberman’. The article tracks the lineage of this imagined persona through a concise review of the author’s journey through fine art research study, before displaying the photographs and reflective text resulting from the walk. Upon analysing these, connections are made to the work of Francesca Woodman, Michael Landy and J. G. Ballard, as it becomes evident that this recent performative development in the author’s practice reveals previously tacit truths about his relationship to his home county and the displacement he feels in twenty-first-century life.
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Thompson, H. D. "THE PALISADES RIDGE IN ROCKLAND COUNTY, N. Y." Annals of the New York Academy of Sciences 80, no. 4 (2006): 1106–26. http://dx.doi.org/10.1111/j.1749-6632.1959.tb49283.x.
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Vink, Joseph P., Nader Soltani, Darren E. Robinson, François J. Tardif, Mark B. Lawton, and Peter H. Sikkema. "Occurrence and distribution of glyphosate-resistant giant ragweed (Ambrosia trifida L.) in southwestern Ontario." Canadian Journal of Plant Science 92, no. 3 (2012): 533–39. http://dx.doi.org/10.4141/cjps2011-249.
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Vink, J. P., Soltani, N., Robinson, D. E., Tardif, F. J., Lawton, M. B. and Sikkema, P. H. 2012. Occurrence and distribution of glyphosate-resistant giant ragweed ( Ambrosia trifida L.) in southwestern Ontario. Can. J. Plant Sci. 92: 533–539. Giant ragweed is the first confirmed glyphosate-resistant (GR) weed in Canada. A survey was conducted to document the distribution of GR giant ragweed in southwestern Ontario. Giant ragweed seed was collected from 102 sites in Essex (70), Chatham-Kent (21), Lambton (10) and Waterloo counties (1) during the autumn of 2009 and 2010 prior to soybean harvest. Plants were grown in a growth room, sprayed with glyphosate at 1800 g a.e. ha−1 and classified as resistant or susceptible. GR giant ragweed has been confirmed at 47 new locations in three counties (Essex, Chatham-Kent and Lambton). The results from this survey indicate that GR giant ragweed biotypes occur across a greater area in southwestern Ontario than originally thought. This survey provides an important baseline for future surveys in the province.
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Clarke, J., and D. L. Brown. "PRICING DECISIONS FOR ONTARIO LAND: THE FARM COMMUNITY and THE SPECULATOR IN ESSEX COUNTY DURING THE FIRST HALF OF THE NINETEENTH CENTURY." Canadian Geographer/Le Géographe canadien 31, no. 2 (1987): 169–77. http://dx.doi.org/10.1111/j.1541-0064.1987.tb01637.x.
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Grisson, Ricky D., Agnès-Laurence Chenine, Lan-Yu Yeh, et al. "Infectious Molecular Clone of a Recently Transmitted Pediatric Human Immunodeficiency Virus Clade C Isolate from Africa: Evidence of Intraclade Recombination." Journal of Virology 78, no. 24 (2004): 14066–69. http://dx.doi.org/10.1128/jvi.78.24.14066-14069.2004.
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ABSTRACT Although human immunodeficiency virus type 1 (HIV-1) clade C continues to dominate the pandemic, only two infectious clade C proviral DNA clones have been described (N. Mochizuki, N. Otsuka, K. Matsuo, T. Shiino, A. Kojima, T. Kurata, K. Sakai, N. Yamamoto, S. Isomura, T. N. Dhole, Y. Takebe, M. Matsuda, and M. Tatsumi, AIDS Res. Hum. Retrovir. 15:1321-1324, 1999; T. Ndung'u, B. Renjifo, and M. Essex, J. Virol. 75:4964-4972, 2001). We have generated an infectious molecular clone of a pediatric clade C strain, HIV1084i, which was isolated from a Zambian infant infected either intrapartum or through breastfeeding. HIV1084i is an R5, non-syncytium-inducing isolate that bears all known clade C signatures; gag, pol, and env consistently mapped within clade C. Interestingly, gag resembled Asian isolates, whereas pol and env resembled African isolates, indicating that HIV1084i probably arose from an intraclade recombination. As a recently transmitted clade C strain, HIV1084i will be a useful vaccine development tool.
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Irving, Rachael, Vilma Charlton, Errol Morrison, Aldeam Facey, and Oral Buchanan. "Demographic Characteristics of World Class Jamaican Sprinters." Scientific World Journal 2013 (2013): 1–5. http://dx.doi.org/10.1155/2013/670217.
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The dominance of Jamaican sprinters in international meets remains largely unexplained. Proposed explanations include demographics and favorable physiological characteristics. The aim of this study was to analyze the demographic characteristics of world class Jamaican sprinters. Questionnaires administered to 120 members of the Jamaican national team and 125 controls elicited information on place of birth, language, ethnicity, and distance and method of travel to school. Athletes were divided into three groups based on athletic disciplines: sprint (s: 100–400 m;n=80), jump and throw (j/t: jump and throw;n=25) and, middle distance (md: 800–3000 m;n=15). Frequency differences between groups were assessed using chi-square tests. Regional or county distribution of sprint differed from that of middle distance (P<0.001) but not from that of jump and throw athletes (P=0.24) and that of controls (P=0.59). Sprint athletes predominately originated from the Surrey county (s = 46%, j/t = 37%, md = 17, C = 53%), whilst middle distance athletes exhibited excess from the Middlesex county (md = 60%). The language distribution of all groups showed uniformity with a predominance of English. A higher proportion of middle distance and jump and throw athletes walked to school (md = 80%, j/t = 52%, s = 10%, and C = 12%) and travelled greater distances to school. In conclusion, Jamaica’s success in sprinting may be related to environmental and social factors.
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Swarzenski, Wolfgang V. "GROUND-WATER SUPPLIES IN PLEISTOCENE AND CRETACEOUS DEPOSITS OF NORTHWESTERN NASSAU COUNTY, N. Y.*." Annals of the New York Academy of Sciences 80, no. 4 (2006): 1077–91. http://dx.doi.org/10.1111/j.1749-6632.1959.tb49281.x.
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Hall, Linda M., Hugh J. Beckie, Ryan Low, et al. "Survey of glyphosate-resistant kochia (Kochia scoparia L. Schrad.) in Alberta." Canadian Journal of Plant Science 94, no. 1 (2014): 127–30. http://dx.doi.org/10.4141/cjps2013-204.
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Hall, L. M., Beckie, H. J., Low, R., Shirriff, S. W., Blackshaw, R. E., Kimmel, N. and Neeser, C. 2014. Survey of glyphosate-resistant kochia ( Kochia scoparia L. Schrad.) in Alberta. Can. J. Plant Sci. 94: 127–130. Glyphosate-resistant (GR) kochia was identified in Warner county in southern Alberta in 2011. To determine the scale of the distribution and frequency of GR kochia, a randomized stratified survey of more than 300 locations (one population per location) in southern Alberta was conducted in the fall of 2012. Mature plants were collected, seed separated, and F1 seedlings screened by spraying with glyphosate at 900 g a.e. ha−1 under greenhouse conditions. Screening confirmed 13 GR kochia sites: seven in Warner county, five in Vulcan county, and one in Taber county. The frequency of GR individuals in a population ranged from 0.3 to 98%. GR kochia were found in arid areas where chemical fallow is a significant component of the rotation. Economic and agronomic impact of this GR weed biotype is compounded because of multiple resistance to acetolactate synthase-inhibiting herbicides.
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Sansford, C. E., P. A. Beales, and J. D. S. Clarkson. "First Report of Flag Smut of Wheat Caused by Urocystis agropyri in the United Kingdom." Plant Disease 82, no. 12 (1998): 1403. http://dx.doi.org/10.1094/pdis.1998.82.12.1403d.
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An isolated occurrence of flag smut of wheat, caused by Urocystis agropyri (G. Preuss) J. Schröt., was confirmed in the county of Essex, UK, in autumn-sown winter wheat (Triticum aestivum L.) cv. Riband grown from certified seed. The origin of the infection is unknown. Symptoms were first observed on 22 May 1998. The presence of U. agropyri was confirmed on the basis of the macroscopic symptoms on the host and the morphology of the pathogen (2). Long gray-black streaks parallel with the veins were observed on leaf blades, especially the flag leaf, and on leaf sheaths. The streaks consisted of lines of fungal sori developing between the leaf veins, giving a striped appearance. Eruption of the sori through the epidermis of the leaves had caused them to fray, exposing dark brown to black powdery spore masses. Microscopic examination revealed spore balls measuring 20 to 28 μm in diameter containing 1 to 3 spores per ball. Spores were dark brown measuring 12 to 17.5 μm in diameter and were surrounded by light brown sterile cells measuring 7 to 7.5 μm. Affected plants were stunted to about half the height of healthy plants. Some affected plants tillered excessively and in some cases the ear failed to emerge from the boot. Some diseased leaves were twisted and, where the host epidermis had ruptured to expose the spore masses, the affected parts had the appearance of being covered in black soot. All of the symptoms are typical of flag smut on wheat. Flag smut has been observed on grasses in every continent except Antartica. However, the distribution of the pathogen on wheat is more limited. Flag smut of wheat is known to occur in at least some of the countries of the European Union as well as (e.g.) the USA and Australia. This finding is significant because it had been considered that U. agropyri on wheat had reached the limits of its ecoclimatic zone, since it requires specific environmental conditions for infection and disease development, particularly a mild winter and an arid summer (1). The climatic conditions in Essex between September 1997 when the affected crop was planted and May 1998 when symptoms were first observed were considerably drier and warmer than normal, thus favoring the pathogen. This is the first report of U. agropyri on wheat in the UK. References: (1) R. F. Line. 1998. Pages 49–60 in: Bunts and Smuts of Wheat: An International Symposium. No. Am. Plant Prot. Org., Ottawa. (2) J. E. M. Mordue and J. M. Waller. 1981. Urocystis agropyri. CMI Descriptions of Pathogenic Fungi and Bacteria, No. 716. Kew, England.
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Prabhakar, Sharad, Nitesh Gahlot, and Bhava RJ Satish. "Minimally Invasive Management of Fracture Calcaneum." Journal of Foot and Ankle Surgery (Asia Pacific) 3, no. 1 (2016): 47–52. http://dx.doi.org/10.5005/jp-journals-10040-1047.
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ABSTRACT Modern usage of minimally invasive methods has been applied to fractures of the calcaneus with good effect in the 21st century. The Essex-Lopresti maneuver has been modified, distraction devices are being judicially used, and the advent of image intensifiers and small joint arthroscopes have allowed accurate visualization of the reduced fracture as well as joint surfaces. It is important to understand that the three-dimensional (3D) anatomy, Böhler and Gissane angles, and heel height have to be restored. The surgeon should be ready to convert to an open procedure at any time. We describe here the method we use in our institute, and this is one of the many methods of managing this complex injury. How to cite this article Dhillon MS, Prabhakar S, Gahlot N, Satish BRJ. Minimally Invasive Management of Fracture Calcaneum. J Foot Ankle Surg (Asia-Pacific) 2016;3(1):47-52.
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Minarik, Mary Jane, Robert Myatt, and Maura Mitrushina. "Adolescent Multiphasic Personality Inventory and Its Utility in Assessing Suicidal and Violent Adolescents." Suicide and Life-Threatening Behavior 27, no. 3 (1997): 278–84. http://dx.doi.org/10.1111/j.1943-278x.1997.tb00410.x.
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Adolescent Multiphasic Personality Inventory profiles of inpatient adolescents were examined to identify differences between suicidal (danger to self, n = 145) and violent (danger to others, n = 36) adolescents. Participants were 181 inpatients (12–17 years old, mean age, 14.7 years) admitted to an adolescent psychiatric unit of a southern California county hospital. Results indicate that the suicide group had significantly higher scores than the violent group on five scales (Hypochondriasis, Psychasthenia, Paranoia, Schizophrenia, and Social Introversion). These scales, singly or in combination, have been found to be indicative of psychotic process. This suggests the presence of psychotic process in suicidal, but not violent, adolescents.
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Ya, Ji-Dong, Yong-Jie Guo, Cheng Liu, et al. "Bulbophyllum reflexipetalum (Orchidaceae, Epidendroideae, Malaxideae), a new species from Xizang, China." PhytoKeys 130 (August 29, 2019): 33–39. http://dx.doi.org/10.3897/phytokeys.130.34153.
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Bulbophyllum reflexipetalum, a new species from Motuo County, Southeast Xizang, China, is described and illustrated here. This new species belongs to Bulbophyllum sect. Umbellata Bentham & J. D. Hooker, and it is morphologically similar to B. umbellatum Lindley, B. guttulatum (J. D. Hooker) N. P. Balakrishnan and B. salweenensis X.H. Jin, but is distinguished from them by having reflexed petals, base of dorsal sepal with 1 dentate on each side, lip with significantly revolute margin, adaxially with dark brown spots or patches and one longitudinal groove.
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Tiako, Max Jordan Nguemeni, Ayotola Fatola, and Joseph Nwadiuko. "Reported Visa Acceptance or Sponsorship for Non-US Citizen Applicants to US Internal Medicine Residency Programs." Journal of Graduate Medical Education 14, no. 6 (2022): 680–86. http://dx.doi.org/10.4300/jgme-d-22-00072.1.
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ABSTRACT Background Non-US citizen international medical graduates (IMGs) make up a significant proportion of the physician workforce, especially in physician shortage areas and specialties. IMGs face barriers matriculating in US residency programs. Whether a program reports accepting J-1 visas and sponsoring H-1B visas influences their decision to apply, it remains unclear which institutional factors shape programs' likelihood to consider visa-seeking applicants. Objective We investigated factors associated with programs reporting accepting J-1 visas or sponsoring H-1B visas for non-citizen applicants in internal medicine, the specialty most sought after by IMGs. Methods We performed multivariable regression analyses using publicly available data to identify characteristics associated with reported visa acceptance (J-1 and or H-1B). Covariates included university affiliation, program size, program type (academic, university-affiliated community, or community), and Doximity reputation ranking. Results We identified 419 programs: 267 (63.7%) reported accepting J-1 visas. Among programs that accepted J-1 visas, 65.6% (n=175) accepted only J-1 visas while 34.5% (n=92) sponsored H-1B and accepted J-1 visas. Ranking in the third quartile (vs first quartile) was associated with lower odds of accepting J-1 (aOR 0.12; 95% CI 0.02-0.87; P=.04) and sponsoring H-1B visas (aOR 0.19; 95% CI 0.05-0.76; P=.02). Community status (vs academic) was associated with lower odds of accepting J-1 visas (aOR 0.2; 95% CI 0.06-0.64; P=.007), as was county hospital affiliation vs non-county hospitals (aOR 0.22; 95% CI 0.11-0.42; P<.001). Conclusions While prior evidence shows that most internal medicine programs that substantially enroll IMGs are low ranking, high-ranking internal medicine programs are paradoxically more likely to report that they consider and sponsor visa-seeking applicants.
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Ortel, Thomas L., Michele Beckman, Lawrence Muhlbaier, et al. "Venous Thromboembolism (VTE) Surveillance: Incidence, Characteristics, and Initial Treatment of VTE Patients." Blood 124, no. 21 (2014): 4256. http://dx.doi.org/10.1182/blood.v124.21.4256.4256.
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Abstract Introduction: Venous thromboembolism (VTE), defined as deep vein thrombosis (DVT), pulmonary embolism (PE), or both, has been estimated to affect 300,000 to 600,000 individuals in the US each year. Incidence estimates suggest that African Americans have similar, or slightly higher, rates of VTE compared to Whites, while Asians appear to have a lower rate (Beckman, et al., Am J Prev Med, 2010;38:S495-S501). Acquired risk factors for VTE can be identified in ~50% of cases. Using a population-based approach, we used multiple case finding techniques to improve estimates of VTE occurrence in a geographically defined, racially diverse population. Methods: Durham County, NC, has a population of ~280,000 individuals, characterized as: 52.4% female; 53% White, 38.8% African American, 4.9% Asian, 1% American Indian, and 2.2% ≥2 races; and 13.5% Hispanic (US Census Data, 2012). The County is served by three hospitals, two in the Duke University Health System (DUHS) that share an electronic medical record, and the Durham Veterans’ Administration Medical Center (VAMC). We used a combination of methods to systematically identify patients living in Durham County with a new diagnosis of VTE. These included direct review of imaging data in the Duke Picture Archive and Communication System (PACS); automated review of ICD9 diagnosis codes for VTE and CPT codes for imaging procedures used for diagnosing DVT and PE stored in the Duke Medicine Enterprise Data Warehouse via the Duke Enterprise Data Unified Content Explorer (DEDUCE); direct review of Duke autopsy reports; and review of Veterans Health Information Systems and Technology Architecture (VISTA) to identify cases at the VAMC. Individual patients and events were cross-referenced to avoid duplicate entries, and demographic, risk factor, and treatment data were collected by record review and entered into a REDCap database. Data for the 9 month period from March through November 2013 collected at the DUHS hospitals are included in this abstract. Results: During the study period, we identified a total of 273 unique individuals with VTE, resulting in an estimated annual incidence of 1.3 per 1,000 individuals in Durham County. The mean age of the patients was 61.6 years (range, 19 to 99 years), and 153 (56%) were female. Mean BMI was 29.5±8.4. Racial distribution of VTE and estimated annual incidence is shown in the table below. Table 1RacePatients, n (%)Estimated annual incidence per 1,000 populationAsian2 (0.73%)0.19African American164 (60%)2.01White104 (38%)0.93Other3 (1.1%)0.45 Characteristics of some of the events and risk factors comparing African American and White patients are shown in the table below. Abstract 4256. Table 2Total (total n=273)African American (total n=164)White (total n=104)Pulmonary emboli141/271 (52%)91/163 (55.8%)48/103 (46.6%)History of prior VTE63/273 (23%)38/162 (23.2%)25/103 (24%)Surgery within the preceding 90 days103/238 (43%)55/151 (36.4%)34/92 (38.0%)Active cancer57/246 (23%)38/153 (24.8%)18/89 (20.2%)Catheter-related17/250 (7%)11/148 (7.4%)6/88 (6.8%) None of these comparisons were statistically significant. Three African American patients had sickle cell disease. Hypertension (p=0.0392) and end-stage renal disease (p=0.0038) occurred more frequently in African American VTE patients compared to White VTE patients. Most patients were treated with anticoagulant therapy at the time of diagnosis (n=236; 87%), including low-molecular weight heparin (n=167; 70.8%), unfractionated heparin (n=78; 33.1%), and rivaroxaban (n=21; 8.9%); some patients received more than 1 agent. 129 patients (54.7%) were started on warfarin at the time of diagnosis. A minority of patients were treated with thrombolytic therapy (n=7; 2.6%), thrombectomy/embolectomy (n=3; 1.1%), or placement of an IVC filter (n=19; 7%). Major bleeding occurred in 6 patients (2.2%). These estimates are subject to limitations. They do not include Durham County residents who were diagnosed and treated completely outside the county, and cases from the Durham VAMC are pending. Conclusions: Our VTE surveillance case finding approach resulted in an estimated annual VTE incidence of ~1.3 persons per 1,000 per year, with an incidence in African Americans that is approximately twice the incidence in Whites. Common risk factors were similar for African Americans and Whites, but hypertension and end-stage renal disease were more common comorbid conditions in African Americans. Disclosures No relevant conflicts of interest to declare.
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Shewry, P. R. "Evolution of Crop Plants. (Second Edition). By J. Smartt and N. W. Simmonds. Harlow, Essex: Longman Scientific and Technical (1995), pp. 531, £70.00. ISBN 0-521-08643-4." Experimental Agriculture 34, no. 1 (1998): 125–30. http://dx.doi.org/10.1017/s0014479798281099.
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Corder, Kirsten L., Helen E. Brown, Caroline HD Croxson, et al. "A school-based, peer-led programme to increase physical activity among 13- to 14-year-old adolescents: the GoActive cluster RCT." Public Health Research 9, no. 6 (2021): 1–134. http://dx.doi.org/10.3310/phr09060.
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Background Adolescent physical activity levels are low and are associated with rising disease risk and social disadvantage. The Get Others Active (GoActive) intervention was co-designed with adolescents and teachers to increase physical activity in adolescents. Objective To assess the effectiveness and cost-effectiveness of the school-based GoActive programme in increasing adolescents’ moderate-to-vigorous physical activity. Design A cluster randomised controlled trial with an embedded mixed-methods process evaluation. Setting Non-fee-paying schools in Cambridgeshire and Essex, UK (n = 16). Schools were computer randomised and stratified by socioeconomic position and county. Participants A total of 2862 Year 9 students (aged 13–14 years; 84% of eligible students). Intervention The iteratively developed feasibility-tested refined 12-week intervention trained older adolescents (mentors) and in-class peer leaders to encourage classes to undertake two new weekly activities. Mentors met with classes weekly. Students and classes gained points and rewards for activity in and out of school. Main outcome measures The primary outcome was average daily minutes of accelerometer-assessed moderate-to-vigorous physical activity at 10 months post intervention. Secondary outcomes included accelerometer-assessed activity during school, after school and at weekends; self-reported physical activity and psychosocial outcomes; cost-effectiveness; well-being and a mixed-methods process evaluation. Measurement staff were blinded to allocation. Results Of 2862 recruited participants, 2167 (76%) attended 10-month follow-up measurements and we analysed the primary outcome for 1874 (65.5%) participants. At 10 months, there was a mean decrease in moderate-to-vigorous physical activity of 8.3 (standard deviation 19.3) minutes in control participants and 10.4 (standard deviation 22.7) minutes in intervention participants (baseline-adjusted difference –1.91 minutes, 95% confidence interval –5.53 to 1.70 minutes; p = 0.316). The programme cost £13 per student compared with control. Therefore, it was not cost-effective. Non-significant indications of differential impacts suggested detrimental effects among boys (boys –3.44, 95% confidence interval –7.42 to 0.54; girls –0.20, 95% confidence interval –3.56 to 3.16), but favoured adolescents from lower socioeconomic backgrounds (medium/low 4.25, 95% confidence interval –0.66 to 9.16; high –2.72, 95% confidence interval –6.33 to 0.89). Mediation analysis did not support the use of any included intervention components to increase physical activity. Some may have potential for improving well-being. Students, teachers and mentors mostly reported enjoying the GoActive intervention (56%, 87% and 50%, respectively), but struggled to conceptualise their roles. Facilitators of implementation included school support, embedding a routine, and mentor and tutor support. Challenges to implementation included having limited school space for activities, time, and uncertainty of teacher and mentor roles. Limitations Retention on the primary outcome at 10-month follow-up was low (65.5%), but we achieved our intended sample size, with retention comparable to similar trials. Conclusions A rigorously developed school-based intervention (i.e. GoActive) was not effective in countering the age-related decline in adolescent physical activity. Overall, this mixed-methods evaluation provides transferable insights for future intervention development, implementation and evaluation. Future work Interdisciplinary research is required to understand educational setting-specific implementation challenges. School leaders and authorities should be realistic about expectations of the effect of school-based physical activity promotion strategies implemented at scale. Trial registration Current Controlled Trials ISRCTN31583496. Funding This project was funded by the National Institute for Health Research (NIHR) Public Health Research programme and will be published in full in Public Health Research; Vol. 9, No. 6. See the NIHR Journals Library website for further project information. This work was additionally supported by the Medical Research Council (London, UK) (Unit Programme number MC_UU_12015/7) and undertaken under the auspices of the Centre for Diet and Activity Research (Cambridge, UK), a UK Clinical Research Collaboration Public Health Research Centre of Excellence. Funding from the British Heart Foundation (London, UK), Cancer Research UK (London, UK), Economic and Social Research Council (Swindon, UK), Medical Research Council, the National Institute for Health Research (Southampton, UK) and the Wellcome Trust (London, UK), under the auspices of the UK Clinical Research Collaboration, is gratefully acknowledged (087636/Z/08/Z; ES/G007462/1; MR/K023187/1). GoActive facilitator costs were borne by Essex and Cambridgeshire County Councils.
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Montano, Monty A., Christian P. Nixon та Max Essex. "Dysregulation through the NF-κB Enhancer and TATA Box of the Human Immunodeficiency Virus Type 1 Subtype E Promoter". Journal of Virology 72, № 10 (1998): 8446–52. http://dx.doi.org/10.1128/jvi.72.10.8446-8452.1998.
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ABSTRACT The global diversity of human immunodeficiency virus type 1 (HIV-1) genotypes, termed subtypes A to J, is considerable and growing. However, relatively few studies have provided evidence for an associated phenotypic divergence. Recently, we demonstrated subtype-specific functional differences within the long terminal repeat (LTR) region of expanding subtypes (M. A. Montano, V. A. Novitsky, J. T. Blackard, N. L. Cho, D. A. Katzenstein, and M. Essex, J. Virol. 71:8657–8665, 1997). Notably, all HIV-1E isolates were observed to contain a defective upstream NF-κB site and a unique TATA-TAR region. In this study, we demonstrate that tumor necrosis factor alpha (TNF-α) stimulation of the HIV-1E LTR was also impaired, consistent with a defective upstream NF-κB site. Furthermore, repair of the upstream NF-κB site within HIV-1E partially restored TNF-α responsiveness. We also show, in gel shift assays, that oligonucleotides spanning the HIV-1E TATA box displayed a reduced efficiency in the assembly of the TBP-TFIIB-TATA complex, relative to an HIV-1B TATA oligonucleotide. In transfection assays, the HIV-1E TATA, when changed to the canonical HIV-1B TATA sequence (ATAAAA→ATATAA) unexpectedly reduces both heterologous HIV-1B Tat and cognate HIV-1E Tat activation of an HIV-1E LTR-driven reporter gene. However, Tat activation, irrespective of subtype, could be rescued by introducing a cognate HIV-1B TAR. Collectively, these observations suggest that the expanding HIV-1E genotype has likely evolved an alternative promoter configuration with altered NF-κB and TATA regulatory signals in contradistinction with HIV-1B.
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Leonard, Bryan, and Steven M. Smith. "Individualistic culture increases economic mobility in the United States." Proceedings of the National Academy of Sciences 118, no. 37 (2021): e2107273118. http://dx.doi.org/10.1073/pnas.2107273118.
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Where an individual grows up has large implications for their long-term economic outcomes, including earnings and intergenerational mobility. Even within the United States, the “causal effect of place” varies greatly and cannot be fully explained by socioeconomic conditions. Across different nations, variation in growth and mobility have been linked to more individualistic cultures. We assess how variation of historically driven individualism within the United States affects mobility. Areas in the United States that were isolated on the frontier for longer periods of time during the 19th century have a stronger culture of “rugged individualism” [S. Bazzi, M. Fiszbein, M. Gebresilasse, Econometrica 88, 2329–2368 (2020)]. We combine county-level measures of frontier experience with modern measures of the causal effect of place on mobility—the predicted percentage change in an individual’s earnings at age 26 y associated with “growing up” in a particular county [R. Chetty, N. Hendren, Q. J. Econ. 133, 1163–1228 (2018)]. Using commuting zone fixed effects and a suite of county-level controls to absorb regional variation in frontier experience and modern economic conditions, we find an additional decade of frontier experience results in 25% greater modern-day income mobility for children of parents in the 25th percentile of income and 14% for those born to parents in the 75th percentile. We use mediation analysis to present suggestive evidence that informal manifestations of “rugged individualism”—those embodied by the individuals themselves—are more strongly associated with upward mobility than formal policy or selective migration.
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Li, Chao, Jianning Dang, and Li Liu. "Enough Terror to Belong: The Nonlinear Association of Death Anxiety with Group Identification." Depression and Anxiety 2024 (May 21, 2024): 1–13. http://dx.doi.org/10.1155/2024/3699789.
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Death anxiety is presumed to be positively associated with group identification; however, recent evidence of a null correlation between the two constructs raises questions regarding this assumption. In contrast to the traditional linear perspective, we proposed and tested a J-shaped curvilinear association that only death anxiety beyond a certain threshold predicts group identification. Using two-wave longitudinal data from the UK, study 1 (N=1,402) revealed that only after reaching a moderate-to-high level could death anxiety measured during the COVID-19 pandemic positively predict later identification with the community, one’s country, and all humanity. Furthermore, using World Values Survey data, study 2 (N=56,871) found that death-related anxiety (i.e., worry about a terrorist attack) was only positively associated with perceived closeness to one’s village, county, and country after reaching a moderate-to-high level. Our findings provide a novel insight into the process of managing terror and the replication failure of the mortality salience effect.
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SHI, SHI, HAIJUN YANG, XUEFEN WEI, et al. "Gastrodia qingyunshanensis (Orchidaceae: Epidendroideae)—a new holomycotrophic orchid from Guangdong, China." Phytotaxa 483, no. 2 (2021): 177–82. http://dx.doi.org/10.11646/phytotaxa.483.2.10.
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A new species of Gastrodia (Orchidaceae: Epidendroideae, Gastrodieae), G. qingyunshanensis, is described and illustrated from Guangdong, China. It is closely related to G. appendiculata C. S. Leou & N. J. Chung but can be distinguished by an urceolate (vs bell-like) and dark brown (vs pale greenish brown) perianth tube, the smaller petals (2.5 × 1.6 mm vs 4–5 × 5–6 mm), the shape of lip (oblong, 3×1.6mm vs ovate, 6–7×5mm), lack of elevated calli at the base of petal (vs having calli), and an appendage shorter than column (vs equal to column). The new species is only reported to occur on Qingyunshan Nature Reserve, Wengyuan County, China, and it is proposed to be Vulnerable (VU) according to the IUCN criteria.
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Robinson-Oghogho, Joelle N., Kassandra I. Alcaraz, and Roland J. Thorpe. "Abstract A115: Structural racism and cancer mortality: An examination of US counties." Cancer Epidemiology, Biomarkers & Prevention 32, no. 12_Supplement (2023): A115. http://dx.doi.org/10.1158/1538-7755.disp23-a115.
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Abstract Background: Although some racial disparities in US cancer mortality rates have narrowed over time, many persist; driven by racialized systems of oppression. Few studies have used multidimensional indices to explore the influence of structural racism on cancer outcomes while also accounting for ambient exposures to environmental hazards or opportunities. To add to research on the impact of structural racism on health, we examined associations between county level measures of structural racism and cancer mortality rates, while accounting for factors associated with cancer mortality, and county level measures of environmental burden. Methods: Data for our analysis come from a previously developed index of county level structural racism, and publicly available data on 2015-2019 cancer mortality rates from the United States Cancer Statistics Data Visualization Tool, 2019 County Health Rankings and Roadmaps, EPA’s 2006-2010 Environmental Quality Index, and 2015-2019 estimates from the US Census American Community Survey. Our outcome of interest was the number of deaths for all cancer types per 100,000 people. Our primary independent variable was the county standardized factor score for structural racism. To account for counties’ level of environmental burden we utilized the overall environmental quality index score. We also accounted for factors associated with cancer mortality rates including race (i.e., Non-Hispanic Black, White, Asian/Pacific Islander, American Indian Alaskan Native), adult smoking, obesity, excessive drinking, uninsured, sexually transmitted infection, and mammography screening rates, and the primary care physician to population ratio. Multiple linear regression analyses were used to examine associations between cancer mortality rates and structural racism standardized factor scores, overall and between race groups, while accounting for the aforementioned covariates and county geographic mobility and percent of the population considered rural. Results: Our analyses of 1,026 US counties indicated cancer mortality rates increased by 3.3 deaths per 100,000 people (95% CI: 1.2, 5.3) for every standard deviation increase in structural racism factor score, while controlling for all other covariates. Additionally, we found that race modified the relationship between structural racism and cancer mortality. Compared to the White population, Black cancer mortality rates increased by 11.9 deaths per 100,000 people (95% CI: 8.8, 14.8), Asian/Pacific Islander rates increased by 4.7 deaths per 100,00 people (95% CI: 1.3, 8.1), and American Indian/Alaskan Native mortality rates increased by 17.4 deaths per 100,000 people (95% CI: 4.2, 30.6) for every standard deviation increase in county structural racism factor score. Conclusion: This study demonstrates how race groups are differentially impacted by the social and physical characteristics of their environments. Our analysis extends the evidence illuminating structural racism as a root cause of cancer health disparities. Citation Format: Joelle N. Robinson-Oghogho, Kassandra I. Alcaraz, Roland J. Thorpe Jr.. Structural racism and cancer mortality: An examination of US counties [abstract]. In: Proceedings of the 16th AACR Conference on the Science of Cancer Health Disparities in Racial/Ethnic Minorities and the Medically Underserved; 2023 Sep 29-Oct 2;Orlando, FL. Philadelphia (PA): AACR; Cancer Epidemiol Biomarkers Prev 2023;32(12 Suppl):Abstract nr A115.
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Shelley, Rowland M. "The milliped family Nearctodesmidae in northwestern North America, with accounts of Sakophallus and S. simplex Chamberlin (Polydesmida)." Canadian Journal of Zoology 72, no. 3 (1994): 470–95. http://dx.doi.org/10.1139/z94-066.
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In northwestern North America, the milliped family Nearctodesmidae is comprised of four genera, Nearctodesmus Silvestri, Kepolydesmus Chamberlin, Ergodesmus Chamberlin, and Bistolodesmus, new genus, and six species, N. insulans (Chamberlin), N. cerasinus (Wood), N. salix Chamberlin, K. anderisus Chamberlin, E. compactus Chamberlin, and B. bonikus (Chamberlin). These species occur along the Pacific coast from San Francisco Bay to Prince Rupert, British Columbia, including all offshore island groups, with an eastward extension into Lewis and Clark County, Montana, east of the Continental Divide. An allopatric population of N. insulanus occurs in the Shuswap Highlands of British Columbia, and an allopatric species, E. remingtoni (Hoffman), inhabits caves in western and southern Illinois. The principal taxonomic characters are the number of secondary projections from the gonopodal telopodite, the configuration of the longer of these, and the length and configuration of the distal zone of the acropodite. Polydesmus bonikus is a nearctodesmid and is assigned to the new genus, Bistolodesmus. The following new synonymies are proposed: Jaliscodesmus Hoffman under Sakophallus Chamberlin; J. alticola Hoffman under S. simplex Chamberlin; N. brunnior, N. campicolens, and N. malkini, all by Chamberlin, under N. cerasinus; N. amissus, N. pseustes, N. renigens, N. carli, and N. boydi, all by Chamberlin, and N. olympus and N. cochlearius, both by Causey, under N. insulanus; K. mimus, K. hesperus, and K. pungo, all by Chamberlin, under K. anderisus; and Ectopodesmus cristatus and E. c. dentatus, both by Loomis and Schmitt, under Ergodesmus compactus. Modern diagnoses and illustrations are presented for the family and all northwestern taxa, along with keys to the genera and species of Nearctodesmus. Accounts and gonopod drawings are also presented of Sakophallus and S. simplex Chamberlin in Michoacan and Jalisco, Mexico.
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Tabaka, Neusa Eliana Wollmann, Fábio Alexandre Borges, Clélia Maria Ignatius Nogueira, and Mariana Moran. "Estratégias matemáticas de estudantes com síndrome de Down diante de situações do Campo Conceitual Aditivo (Student’s mathematical strategies with Down syndrome in face of Additive Conceptual Field situations)." Revista Eletrônica de Educação 15 (February 28, 2021): e4437018. http://dx.doi.org/10.14244/198271994437.
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e4437018This article presents an investigation in which we sought to analyze the mathematical strategies used by students with Down Syndrome (DO) in face of additive conceptual field situations, based on Gérard Vergnaud's theory, and presented with multi-sensorial materials. The situations were developed with five DO students from four different schools (one Special and the others, regular schools) as well as from different grades: three from Elementary School; one from School, and one from High School. The work was organized in stages: the first five stages were aimed at identifying the knowledge that the students had related to Arithmetic; and stage 6 presented situations that had different typologies. The materials for this proposal were developed considering a multi-sensorial perspective. Each participant developed the activities individually and in isolation, on different days and places. The application of the activities was recorded on video with subsequent analysis of the research participants’ actions. Among the results, the importance of the multi-sensorial materials in the Mathematics teaching and learning process for all students is highlighted, with emphasis on those with DO, showing that it is possible for them to solve situations in the additive conceptual field, provided they are adapted to their specificities.ResumoEste artigo apresenta uma investigaçãosustentada na teoria de Gérard Vergnaud por meio da qual se buscou analisar as estratégias matemáticas usadas por estudantes com Síndrome de Down (SD) frente a situações do campo conceitual aditivo e apresentadas com materiais multissensoriais. As situações foram desenvolvidas com cinco estudantes com SD de quatro escolas diferentes (uma Especial e as demais regulares) e de diferentes anos escolares: três dos anos iniciais do Ensino Fundamental; um dos anos finais do Ensino Fundamental e um do Ensino Médio. O trabalho foi organizado em etapas, sendo que as cinco primeiras foram destinadas a identificar os conhecimentos que os estudantes possuiam relacionados à Aritmética e a etapa 6 apresentou situações que possuiam tipologias diferentes. Os materiais para essa proposta foram desenvolvidos considerando uma perspectiva multissensorial. Cada participante desenvolveu as atividades individual e isoladamente, em dias e locais diferentes. A aplicação das atividades foi registrada em vídeo com posterior análise das ações dos participantes da pesquisa. Dentre os resultados, destaca-se a importância dos materiais multissensoriais no ensino e aprendizagem de Matemática para todos os estudantes, com destaque para aqueles com SD, evidenciando que é possível esses últimos resolverem situações do campo conceitual aditivo, desde que adaptadas às suas especificidades.Palavras-chave: Campo Conceitual Aditivo, Síndrome de Down, Material multissensorial.Keywords: Additive Conceptual Field, Down Syndrome, Multi-sensory Material.ReferencesABDELAHMEED, H. Do children with Down syndrome have difficulty in counting and why? Internacional Journal of Special Education, v. 22, n.2, 2007.CAYCHO, L.; GUNN, P.; SIEGAL, M. Counting by children with Down syndrome. American Journal on mental retardation, vol. 95, No. 5, p. 575-583, 1991PORTER, J. Learning to count: A difficult task? Down’s Syndrome: Research and Practice, v.6, n.2, p.85-94, 1999SANTANA, E. R. dos S. Adição e Subtração: O suporte didático influencia a aprendizagem do estudante? Editora UESC, Ilhéus, BA, 2012.SCHWARTZMAN, J. S. Síndrome de Down. 2. Ed. São Paulo: Memnon, 2003.SILVA, R. N. A. A. Educação Especial da criança com Síndrome de Down. In.: BELLO, J. L. de P. Pedagogia em Foco. Rio de Janeiro, 2002. Disponível em http://www.pedagogiaemfoco.pro.br/spdslx07.htm. Acesso em 22 mar. 2014.TALL, D. Concept images, generic organizers, computers and curriculum change. For the Learning of Mathematics, 9 (3), p.37-42, 1989.TALL, D.; VINNER, S. Concept image and concept definition in Mathematics with particular reference to limits and continuity. Educational Studies in Mathematics, v.12, p.151-169, 1981.VERGNAUD, G. A criança a matemática e a realidade. Trad. Maria Lucia Faria Moro. Curitiba: Editora UFPR, 2009.VERGNAUD, G. A gênese dos campos conceituais. In: GROSSI, E. P. (Org). Por que ainda há quem não aprende? 2ª edição. Petrópolis: Vozes, 2003.VERGNAUD, G. La théorie des champs conceptual. In BRUN, J. (Org.). Didactique des Mathématiques. Lausanne-Paris: Delachaux, 1996.VERGNAUD, G. La Teorie des Champs Conceptuals RDM, v.10, n.23, 1990.VERGNAUD, G. Teoria dos Campos Conceituais. Anais do 1º Seminário Internacional de Educação Matemática do Rio de Janeiro. Rio de Janeiro, 1993, p.1-16.YOKOYAMA, L. Uma abordagem multissensorial para o desenvolvimento do conceito de número natural em indivíduos com síndrome de Down. (Tese de Doutorado). Universidade Bandeirante de São Paulo, São Paulo, Brasil. 2012YOKOYAMA, L. A. Matemática e síndrome de Down. Rio de Janeiro: Ciência Moderna Ltda, 2014.
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DRONEN, NORMAN O., SCOTT L. GARDNER, and F. AGUSTÍN JIMÉNEZ. "Haematotrephus limnodromi n. sp. (Digenea: Cyclocoelidae) from the Long-billed dowitcher, Limnodromus scolopaceus (Scolopacidae) from the central flyway of North America." Zootaxa 1153, no. 1 (2006): 51. http://dx.doi.org/10.11646/zootaxa.1153.1.6.
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During a study of the endohelminths of wading birds from the Texas Gulf coast, 5 specimens of an undescribed species of Haematotrephus (Cyclocoelidae) were studied and described. These specimens were collected by Dr. J. Teague Self, former professor, Department of Zoology, University of Oklahoma, Norman, Oklahoma from the air sacs of a long-billed dowitcher, Limnodromus scolopaceus, that was collected from the Cheyenne Bottoms, Roger Mills County, Oklahoma on August 3, 1963 and deposited in the Manter Laboratory of Parasitology. Haematotrephus limnodromi n. sp. can be distinguished from all the other species in the genus that lack an oral sucker (H. capellae, H. chengi, H. dollfusi, H. fasciatum, H. kossacki, H. lanceolatum, H. longisacculatum, H. nebularium, H. nigropunctatum, and H. phaneropsolus) by having intertesticular uterine loops. Corpopyrum brazilianum (originally described as Cyclocoelum brazilianum) is transferred as the second species in Selfcoelum, Corpopyrum dendrei is transferred to Neohaematotrephus, and Haematotrephus facioi is transferred to Wardianum. This is the first report of a species of Haematotrephus from a species of Limnodromus.
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Koike, S. T., Y. W. Kuo, M. R. Rojas, and R. L. Gilbertson. "First Report of Impatiens necrotic spot virus Infecting Lettuce in California." Plant Disease 92, no. 8 (2008): 1248. http://dx.doi.org/10.1094/pdis-92-8-1248a.
Full textAbstract:
Impatiens necrotic spot virus (INSV; family Bunyaviridae, genus Tospovirus) is an important pathogen of ornamental plants in North America and Europe, particularly in the greenhouse industry (2,3). However, INSV is now emerging as a pathogen of vegetable crops. During the 2006 and 2007 growing seasons, lettuce (Lactuca sativa) in Monterey County, CA showed necrotic spotting, leaf chlorosis, and plant stunting typical of symptoms induced by Tomato spotted wilt virus (TSWV). Significant and damaging outbreaks of these disease symptoms were found in numerous romaine, greenleaf, redleaf, butterhead, and iceberg lettuce fields in Monterey and San Benito counties. Samples from symptomatic plants from 21 of 27 fields in Monterey County were negative when tested with TSWV immunostrips (Agdia, Elkhart, IN); however, tests of the TSWV-negative samples with INSV immunostrips were positive. In most fields where INSV was detected, disease development was limited to the edges of fields and disease incidence was <5%; however, some fields had incidences >50% and crop loss was experienced. The virus causing the tospovirus symptoms in the TSWV-negative lettuce was sap transmitted to Nicotiana benthamiana and lettuce, where it induced chlorosis and necrosis. Symptoms in N. benthamiana were consistent with INSV infection, and those in lettuce were similar to symptoms observed in the field. Immunostrip tests confirmed that symptomatic N. benthamiana and lettuce plants were infected with INSV. To further confirm the identity of this virus, reverse transcription (RT)-PCR analysis was conducted with an INSV primer pair that directs the amplification of a ~1.3-kb fragment from the small RNA of INSV (4). The 1.3-kb fragment was amplified from RNA from symptomatic lettuce plants that were INSV positive with immunostrips, and not from asymptomatic lettuce. A total of 38 of 54 samples showing tospovirus-like symptoms were confirmed to be infected with INSV by RT-PCR. Sequences of two representative 1.3-kb DNA fragments were 98 to 99% identical with sequences of INSV isolates from Japan, Italy, and The Netherlands (GenBank Accession Nos. AB109100, DQ425096, and X66972). Taken together with the previous identification of the INSV vector, the western flower thrips (Frankliniella occidentalis), in central California lettuce (1), these results confirm that INSV induced tospovirus symptoms in lettuce fields in Monterey County in 2007. To our knowledge, this is the first report of the occurrence of INSV infecting lettuce in California. References: (1) W. E. Chaney. Annu. Rep. California Lettuce Res. Board. 2006. (2) M. Daughtrey et al. Plant Dis. 81:1220, 1997. (3) M. D. Law and J. W. Moyer. J. Gen. Virol. 71:933, 1990. (4) R. A. Naidu et al. Online publication. doi: 10.1094/PHP-2005-0727-01-HN. Plant Health Progress, 2005.
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Grande, RB, K. Aaseth, C. Lundqvist, and MB Russell. "Prevalence of New Daily Persistent Headache in the General Population. The Akershus Study of Chronic Headache." Cephalalgia 29, no. 11 (2009): 1149–55. http://dx.doi.org/10.1111/j.1468-2982.2009.01842.x.
Full textAbstract:
The aim of the present study was to investigate the prevalence of new daily persistent headache (NDPH) in the general population, and compare the clinical characteristics of NDPH and chronic tension-type headache (CTTH). This is a population-based cross-sectional study. A random sample of 30 000 persons aged 30-44 years was drawn from the population of Akershus County, Norway. A postal questionnaire was screened for chronic headache. Those ( n = 633) with self-reported chronic headache within the last month and/or year were invited to an interview and examination by a neurological resident. A follow-up interview was conducted after 1.5-3 years. The headaches were diagnosed according to the International Classification of Headache Disorders, 2nd edn and relevant revisions. The response rate of the questionnaire was 71% and the participation rate of the interview was 74%. Four persons, three men and one woman, had NDPH. The overall 1-year prevalence of NDPH was 0.03%. The clinical characteristics of NDPH and CTTH were similar, except for the sudden onset in NDPH. Three of the four persons with NDPH had medication overuse. Follow-up disclosed that the symptomatology of NDPH is not unchangeable, since two persons had improvement of their NDPH. NDPH is rare and occurs in one of 3500 persons from the general population of 30-44-year-olds. It is often associated with medication overuse.
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Clasen, Benjamin, Nicole Moss, Monika Chandler, and Alan Smith. "A preliminary genetic structure study of the non-native weed, common tansy (Tanacetum vulgare)." Canadian Journal of Plant Science 91, no. 4 (2011): 717–23. http://dx.doi.org/10.4141/cjps10203.
Full textAbstract:
Clasen, B. M., Moss, N. G., Chandler, M. A. and Smith, A. G. 2011. A preliminary genetic structure study of the non-native weed, common tansy (Tanacetum vulgare). Can. J. Plant Sci. 91: 717–723. Common tansy is an herbaceous perennial member of the Asteraceae and is considered a weed in North America. Common tansy was introduced deliberately for use as a funerary herb, medicine, preservative, and animal and insect repellent. It is known to escape cultivation and invade disturbed areas, spreading both sexually and asexually. This paper reports a preliminary analysis of the genetic structure of 10 invasive common tansy populations in Minnesota and Montana, USA, and Alberta, Canada. Ninety polymorphic loci were found using six inter simple sequence repeat (ISSR) primers used to amplify DNA from 40 individuals from 10 discrete populations. The diversity within and among populations was assessed using the Dice coefficient of similarity and AMOVA. The AMOVA showed that diversity within populations was generally high and that there was relatively small variation among populations. An unweighted pair-group with arithmetic mean (UPGMA) dendrogram was constructed based on the distance between populations, and demonstrated substantial and distinct clustering of a population from Ramsey County, Minnesota. A principal coordinates analysis clustered all individuals from Ramsey County distinctly from other individuals, indicating a possible limited gene flow among this population and the other populations sampled in this study. Understanding genetic diversity and the distribution of diversity within and among populations may help predict the potential for successful management of common tansy populations in North America.
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Shen, Y. M., C. H. Chao, and H. L. Liu. "First Report of Neofusicoccum parvum Associated with Stem Canker and Dieback of Asian Pear Trees in Taiwan." Plant Disease 94, no. 8 (2010): 1062. http://dx.doi.org/10.1094/pdis-94-8-1062b.
Full textAbstract:
Asian pear tree (Pyrus pyrifolia) is an important fruit crop in Asian countries. Between the autumn of 2008 and the summer of 2009, stem cankers and twig diebacks of Asian pear trees were observed in middle Taiwan. Necrotic lesions extending from branch scars progressed with age, resulting in darkened vascular discoloration. Two cultivars of Asian pear, Taichung No. 2 grown in Changhwa County and Heng-shan grown in Taichung County, showed the same symptoms. Disease incidence increased rapidly after a rain or storm event, eventually exceeding 50%. Pycnidia on severely infected branches contained one-celled, fusiform to ellipsoidal, smooth- and thin-walled hyaline conidia, with an average length (L) and width (W) of 19.1 (11.3 to 24.8) × 5.9 (4.5 to 8.0) μm and a L/W ratio of 3.2 (n = 44). Diseased branch tissues collected from the two locations were surface sterilized in 0.6% NaOCl, rinsed with water, and plated on potato dextrose agar (PDA). Fungal isolates, recovered from both locations, produced white, aerial mycelium and became dull gray within a week after incubating plates at 25°C. To confirm the identities of the isolates, the internal transcribed spacer (ITS) regions amplified with primers ITS1/ITS4 were deposited in GenBank (Accession Nos. GU395186 and GU395187). Both of the sequences were 99% identical to that of Neofusicoccum parvum (Accession No. EU882162) over a 534-bp alignment. Thus, both morphological and molecular characters confirmed this species as N. parvum (3), reported as the anamorph of Botryosphaeria parva (1). The two voucher isolates (BCRC34605 and BCRC34609) were deposited in Bioresource Collection and Research Center, Hsinchu, Taiwan. Pathogenicity tests were first conducted on 2-year-old greenhouse-potted Asian pear trees utilizing N. parvum isolate BCRC34605. Ten plants of the cv. Mi-li were stem wounded with a 5-mm cork borer at a depth of 2 mm. Inoculation consisted of inserting 5-mm mycelium plugs of the pathogen into the wounds and wrapping with Parafilm. Sterile PDA plugs applied to an equal number of plants with the same methods served as the controls. After 2 months incubation at an average temperature of 21°C, all inoculated plants exhibited necrotic lesions with a mean length of 23.5 mm and the control plants remained symptomless. The pathogen was reisolated from lesions of inoculated stems, thus fulfilling Koch's postulates. Pathogenicity tests were repeated by inoculating the other N. parvum isolate (BCRC34609) on pear cv. Taichung No. 2, resulting in similar results. N. parvum has been reported causing dieback and canker in a wide range of fruit trees, including grapevine (4) and mango trees (2). To our knowledge, this is the first report of N. parvum associated with stem canker and dieback on Asian pear trees. In addition, this is a newly recorded species for the mycobiota of Taiwan. References: (1) P. W. Crous et al. Stud. Mycol. 55:235, 2006. (2) J. Javier-Alva et al. Plant Dis. 93:426, 2009. (3) S. R. Mohali et al. Fungal Divers. 25:103, 2007. (4) J. R. Urbez-Torres and W. D. Gubler. Plant Dis. 93:584, 2009.
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Hirsch, R. L., D. O. TeBeest, B. H. Bluhm, and C. P. West. "First Report of Rust Caused by Puccinia emaculata on Switchgrass in Arkansas." Plant Disease 94, no. 3 (2010): 381. http://dx.doi.org/10.1094/pdis-94-3-0381b.
Full textAbstract:
In May 2007, switchgrass (Panicum virgatum L.) cv. Alamo and a breeding line, OSU-NSL 2001-1, were planted at the Arkansas Agricultural Research and Extension Center, Fayetteville. In August 2008, a high incidence of dark brown-to-black rectangular foliar lesions delineated by major veins was observed throughout plots of both lines. Lesions covered 25% to nearly 100% of total leaf tissue. Similar symptoms were also observed on unknown switchgrass cultivars in Benton County in northwest Arkansas and in St. Francis County in east-central Arkansas, suggesting that the disease was widely distributed throughout the state. The pathogen produced epiphyllous and adaxial masses of dark brown-to-black telia from erumpent fissures on leaf surfaces. Dark brown teliospores were observed under magnification and were two-celled, oblong to ellipsoid, and 33 ± 3.5 μm long with an apical cell width of 17.5 ± 2.7 μm and basal cell width of 16.2 ± 2.8 μm (reported as mean ± standard deviation, n = 25). Pedicles were colorless to light brown and measured 25.4 ± 9.2 μm (n = 25). In June 2009, at the Fayetteville Research and Extension Center, several second-year stands of switchgrass developed amphigenous and adaxial foliar lesions containing urediniospores. The uredia were globose and finely echinulate, measuring 23.1 ± 2.2 μm (n = 25) with brown cell walls. Teliospore and urediniospore morphology from all collections was consistent with Puccinia emaculata Schw. (2). Genomic DNA was extracted from a representative infected leaf of cv. Alamo, collected in Fayetteville, AR in June 2009, and amplified by PCR with primer sets PRITS1F (3) and ITS4B (1), which amplified an 803-bp fragment of rDNA encoding the first internal transcribed spacer (ITS1), 5.8S subunit, and second internal transcribed spacer (ITS2). The fragment was cloned into pGEM T Easy (Promega Corp, Madison, WI) and sequenced. A BLAST search of GenBank revealed that the fragment was most similar to the rDNA of P. emaculata (GenBank Accession No. EU915294.1; 755 of 758 bases matching; 99% identity) previously reported as a pathogen on switchgrass in Tennessee (3). The incidence and severity of rust on the widely planted switchgrass cv. Alamo is considerable cause for concern as efforts are made to increase acreage and production. Climatic conditions in St. Francis County are generally consistent with locations in Tennessee where switchgrass rust was previously reported (3). However, northwest Arkansas represents the eastern edge of the southwestern United States, suggesting that P. emaculata may affect switchgrass in geographically diverse areas of the United States. To our knowledge, this study represents the first report of rust on switchgrass in Arkansas. Managing this disease will be an important consideration for large-scale switchgrass cultivation in the state. References: (1) M. Gardes and T. D. Bruns. Mol. Ecol. 2:113, 1993. (2) P. Ramachar and G. Cummins. Mycopathol. Mycol. Appl. 25:7, 1965. (3) J. Zale et al. Plant. Dis. 92:1710, 2008.
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Stanosz, G. R., and G. W. Moorman. "Branch Dieback of Savin Juniper in Pennsylvania Caused by Diplodia mutila." Plant Disease 81, no. 1 (1997): 111. http://dx.doi.org/10.1094/pdis.1997.81.1.111a.
Full textAbstract:
Branch dieback of savin juniper (Juniperus sabina L.) was observed on a tree in Dauphin County, PA, in May 1996. The symptomatic tree was in an ornamental planting that had been established approximately 10 years previously. Branches were cankered and girdled, causing yellowing and death of foliage beyond the cankers. Black pycnidia occurred in necrotic bark of cankers. Dark, two-celled conidia obtained from these pycnidia produced pure cultures of Diplodia mutila (Fr.:Fr.) Mont., the anamorph of Botryosphaeria stevensii Shoemaker. The fungus was identified based on pycnidial, conidial, and cultural characteristics, and comparison with known isolates provided by N. A. Tisserat (2). Pathogenicity of a single conidial isolate from Pennsylvania was tested in a greenhouse by wounding and inoculating twigs of potted eastern red cedar (Juniperus virginiana L.) with water agar plugs colonized by mycelium. Cankers formed and enlarged to girdle and kill the inoculated shoots, from which the pathogen was reisolated. No symptoms developed on, nor was the pathogen isolated from, control twigs. B. stevensii has been reported more frequently on angiosperms, such as apple (Malus Mill.) and oak (Quercus L.), than on gymnosperms. However, a canker disease caused by B. stevensii previously has been reported to affect J. scopulorum Sarg. and J. virginiana in Kansas, Missouri, and Iowa (1,2). References: (1) P. H. Flynn and M. L. Gleason. Plant Dis. 77:210, 1993. (2) N. A. Tisserat et al. Plant Dis. 72:699, 1988.
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Walukana, George, Shital Maru, Peter Karimi, and Pierre Claver Kayumba. "Effect of Universal Health Coverage on the Availability of Medicines in Public Health Facilities in Kisumu County, in Kenya." Rwanda Journal of Medicine and Health Sciences 4, no. 2 (2021): 269–80. http://dx.doi.org/10.4314/rjmhs.v4i2.6.
Full textAbstract:
BackgroundStock outs of medicines and unaffordable cost are two major barriers of access to healthcare. Universal Health Coverage (UHC) seeks to ensure that all people have access to quality essential health services without suffering financial hardship.ObjectiveThe main objective of the study was to determine the effect and challenges of UHC program on the availability of medicines in public health facilities in Kisumu County.MethodologyThe study used a Pretest - posttest research design. The study was carried out in twenty-nine health facilities that were selected using stratified random sampling. Data was collected using key informant interviews with a health worker in each facility. Participants also involved four hundred and forty-four patients selected from the chosen facilities using consecutive sampling. Data from patients was collected using researcher administered questionnaires.ResultsThe availability of medicines improved by 3.4% for 20 tracer medicines since the introduction of the pilot UHC in Kisumu County. This was also supported from the patient’s perspective (n= 444; 79.5%).
conclusion
In spite of this, health workers experienced challenges which included inadequate supply, delays and stock out of some medicines. Other challenges were overworking, shortage of qualified staff and inconsistent supplies.
Rwanda J Med Health Sci 2021;4(2): 269-280
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Keith, Rachel J., Rochelle H. Holm, Alok R. Amraotkar, et al. "Stratified Simple Random Sampling Versus Volunteer Community-Wide Sampling for Estimates of COVID-19 Prevalence." American Journal of Public Health 113, no. 7 (2023): 768–77. http://dx.doi.org/10.2105/ajph.2023.307303.
Full textAbstract:
Objectives. To evaluate community-wide prevalence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection using stratified simple random sampling. Methods. We obtained data for the prevalence of SARS-CoV-2 in Jefferson County, Kentucky, from adult random (n = 7296) and volunteer (n = 7919) sampling over 8 waves from June 2020 through August 2021. We compared results with administratively reported rates of COVID-19. Results. Randomized and volunteer samples produced equivalent prevalence estimates (P < .001), which exceeded the administratively reported rates of prevalence. Differences between them decreased as time passed, likely because of seroprevalence temporal detection limitations. Conclusions. Structured targeted sampling for seropositivity against SARS-CoV-2, randomized or voluntary, provided better estimates of prevalence than administrative estimates based on incident disease. A low response rate to stratified simple random sampling may produce quantified disease prevalence estimates similar to a volunteer sample. Public Health Implications. Randomized targeted and invited sampling approaches provided better estimates of disease prevalence than administratively reported data. Cost and time permitting, targeted sampling is a superior modality for estimating community-wide prevalence of infectious disease, especially among Black individuals and those living in disadvantaged neighborhoods. (Am J Public Health. 2023;113(7):768–777. https://doi.org/10.2105/AJPH.2023.307303 )
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Bianco, L. F., E. C. Martins, R. S. Toloy, D. A. B. Coletti, D. C. Teixeira, and N. A. Wulff. "First Report of Phytoplasmas Groups 16SrI and 16SrXV in Crotalaria juncea in Brazil." Plant Disease 98, no. 7 (2014): 990. http://dx.doi.org/10.1094/pdis-11-13-1190-pdn.
Full textAbstract:
Sunn hemp (Crotalaria juncea L., Fabaceae) is widely used as a cover crop in sugar cane and citrus plantations in Brazil. C. juncea has been reported in São Paulo State (SPS) by Wulff et al. (3) as a host of the phytoplasma associated with symptoms of huanglongbing (HLB) in citrus, a member of group 16SrIX, that induces witches'-broom in sunn hemp (3). In studying the distribution of group 16SrIX phytoplasma in C. juncea in SPS, we identified this species as a new host of two phytoplasmas. Sunn hemp fields were inspected for symptoms usually associated with phytoplasma infections, such as leaf yellowing, shoot proliferation, witches'-brooms, and virescence. Ninety-nine plant samples were collected and DNA was extracted with the CTAB protocol from stems. Nested PCR was carried out with primers P1/P7, followed by amplification with primers fU3/rU5 (2), both sets being universal for phytoplasma. Asymptomatic sunn hemp samples were used as negative controls and were negative in PCR reactions. PCR products were directly sequenced with primers P1/P7 and fU3/rU5 and phytoplasma identification was conducted with BLASTn and in silico RFLP analysis for delineation of subgroups (4). Plants showing leaf yellowing (three plants; Catanduva County), shoot proliferation (one plant; Ibirá County), or witches'-brooms (one plant; Promissão County) symptoms were found to be infected with the 16SrI phytoplasma group, subgroup S. The 16S rDNA sequence (GenBank Accession No. KF878383) showed 99% identity (E value 0.0) with Candidatus Phytoplasma asteris, Onion yellows phytoplasma OY-M (AP006628), Mulberry yellow dwarf phytoplasma (GQ249410), and Ash witches'-broom phytoplasma (AY566302), among other phytoplasmas from the same group. Sunn hemp plants with shoot proliferation (three plants) carried the 16SrXV phytoplasma group, subgroup A, found in Ibirá (two plants) and Catanduva (one plant) counties, SPS. This sequence (GenBank Accession No. KF878382) displayed 99% identity (E value 0.0) with Ca. P. brasiliense, Hibiscus witches'-broom phytoplasma (AF147708), Guazuma ulmifolia witches'-broom phytoplasma (HQ258882, HQ258883), and Cauliflower stunt phytoplasma (JN818845). Both phytoplasma groups described in this report, 16SrI and 16SrXV, were collected in May 2010 and both have limited geographic distribution and occurred at low incidence. Phytoplasma of group 16SrI (Ca. P. asteris) was identified in C. spectabilis in India (1). To our knowledge, this is the first report of phytoplasmas groups 16SrI and 16SrXV in sunn hemp. References: (1) S. Kumar et al. Plant Dis. 94:1265, 2010. (2) E. Seemüller et al. Int. J. Syst. Bacteriol. 44:440, 1994. (3) N. A. Wulff et al. Tropical Plant Pathol. 34:S7, 2009. (4) Y. Zhao et al. Int. J. Syst. Evol. Microbiol. 59:2582, 2009.
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Ahlers-Schmidt, Carolyn R., Nikki Keene Woods, Danielle Bradshaw, Anna Rempel, Matt Engel, and Mary Benton. "Maternal Knowledge, Attitudes, and Practices Concerning Interpregnancy Interval." Kansas Journal of Medicine 11, no. 4 (2018): 86–90. http://dx.doi.org/10.17161/kjm.v11i4.8703.
Full textAbstract:
Introduction. Few studies have examined maternal intentions andpractices related to interpregnancy interval (IPI). IPI less than 18months has been linked to increased preterm birth and infant mortality.This manuscript reports on a cross-sectional survey of mothersconducted to understand maternal knowledge, attitudes, and practiceof IPI in Sedgwick County, Kansas.
Methods. New and expectant mothers and mothers of neonatalinfant care unit (NICU) graduates (n = 125) were surveyed regardingthe issues surrounding IPI. Front desk staff handed out self-administeredsurveys, which were returned to a nurse upon completion.NICU participants were emailed a link to the survey hosted on SurveyMonkey®.
Results. Fewer than 30% of mothers reported previously receivinginformation about IPI from any source. When asked about risks associatedwith IPI, women frequently (n = 58, 45%) identified increasedrisk for birth outcomes with no known association with short IPI.Findings regarding maternal attitudes surrounding optimal IPI weremixed with many mothers defining ideal IPI as less than 18 months(n = 52, 42%), while broadly reporting they believed that a woman’sbody needs time to heal between pregnancies. Respondents from theNICU sample generally reported shorter optimal IPI values than theother participants. When IPI was estimated from participants’ pastpregnancies, half of IPIs were less than 18 months. Mothers reportedthey favored healthcare providers as a source for IPI education. Faceto-face discussions or printed materials were the preferred modes ofeducation.
Conclusions. Women were aware of the need for spacing betweenpregnancies, however, that knowledge was unassociated with pastbehavior. These findings should be taken into consideration whenformulating future interventions. Kans J Med 2018;11(4):86-90.
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Ahn, Jaeil, Isabella J. Boroje, Hamid Ferdosi, Zachary J. Kramer, and Steven H. Lamm. "Prostate Cancer Incidence in U.S. Counties and Low Levels of Arsenic in Drinking Water." International Journal of Environmental Research and Public Health 17, no. 3 (2020): 960. http://dx.doi.org/10.3390/ijerph17030960.
Full textAbstract:
Background: Although inorganic arsenic in drinking water at high levels (100s–1000s μg/L [ppb]) increases cancer risk (skin, bladder, lung, and possibly prostate), the evidence at lower levels is limited. Methods: We conducted an ecologic analysis of the dose-response relationship between prostate cancer incidence and low arsenic levels in drinking water in a large study of U.S. counties (N = 710). County arsenic levels were <200 ug/L with median <100 ug/L and dependency greater than 10%. Groundwater well usage, water arsenic levels, prostate cancer incidence rates (2009–2013), and co-variate data were obtained from various U.S. governmental agencies. Poisson and negative-binomial regression analyses and stratified analysis were performed. Results: The best fitting polynomial analysis yielded a J-shaped linear-quadratic model. Linear and quadratic terms were significant (p < 0.001) in the Poisson model, and the quadratic term was significant (p < 0.05) in the negative binomial model. This model indicated a decreasing risk of prostate cancer with increasing arsenic level in the low range and increasing risk above. Conclusions: This study of prostate cancer incidence in US counties with low levels of arsenic in their well-water arsenic levels finds a j-shaped model with decreasing risk at very low levels and increasing risk at higher levels.
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MacKenzie, M., and A. J. Iskra. "The First Report of Beech Bark Disease in Ohio Comes Nineteen Years After the First Report of the Initiating Scale." Plant Disease 89, no. 2 (2005): 203. http://dx.doi.org/10.1094/pd-89-0203a.
Full textAbstract:
Beech bark disease (BBD) is a two-part disease complex. It first requires the feeding of an initiating insect scale and is only fully developed when scale-altered bark becomes infected by one of two Neonectria species. In Ohio, there was a 19-year lag between discovery of the initiating scale insect and the development of BBD. In September 1984, the BBD-initiating scale (Cryptococcus fagisuga Lind) was discovered in the Holden Arboretum, Geauga County, OH (2). Nineteen years later (December 2003), A. Iskra discovered the exotic BBD-causing fungus, Neonectria coccinea (Pers.:Fr.) Rossman & Samuels var faginata Lohman, Watson & Ayers, on American beech (Fagus grandifolia Ehrh.) in the Holden Arboretum. In 1934, Erlich (1) reported that there was normally a delay of at least 1 year between the appearance of the scale and the first appearance of the Neonectria spp. fungus. In the years immediately after the first report of the scale in Ohio (2), pathologists and arboretum staff made frequent visits to the site in an attempt to find Neonectria spp. fruiting. After a decade of searching, these visits became more infrequent. However, it was on one of these visits that A. Iskra found the fungus. He found it on only four trees, none of which had the extensive bark cankering common in chronic Neonectria spp. infections. In North America, the two species of Neonectria that have been involved in BBD mortality are the native N. galligena (Bres.) Rossman & Samuels, or the exotic N. coccinea var faginata. In the absence of beech scale infestations, reports of the native N. galligena infecting American beech are few. Yet, in West Virginia, western Pennsylvania, Michigan, and possibly North Carolina, the fungus first associated with the killing front has been the native N. galligena and not the exotic variety, N. coccinea var faginata. To our knowledge, this is the first report of BBD in Ohio and it is unique because the associated fungus is the exotic variety. References: (1) J. Erlich. Can. J. Res. 10:593, 1934. (2) M. E. Mielke et al. Plant Dis. 69:905, 1985.
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Bag, S., J. Singh, R. M. Davis, W. Chounet, and H. R. Pappu. "Iris yellow spot virus in Onion in Nevada and Northern California." Plant Disease 93, no. 6 (2009): 674. http://dx.doi.org/10.1094/pdis-93-6-0674c.
Full textAbstract:
The disease caused by thrips-transmitted Iris yellow spot virus (IYSV; genus Tospovirus, family Bunyaviridae) has become a major constraint to bulb and seed onion crops in several parts of the country and the world (1,3). As part of an ongoing survey for IYSV incidence in onion in the western United States, commercial fields in Lyon County, Nevada and several commercial fields in the northern Californian counties of Colusa, San Benito, Sutter, and Yolo were surveyed during the summer of 2008. Symptomatic plants were found widespread in northern California, especially in seed-production fields. In Lyon County, NV, symptoms were observed only on volunteer onions in one commercial field. Symptoms on leaves and scapes included characteristic diamond-shaped lesions with or without green islands. Four samples from Nevada and fourteen from northern California were tested by double-antibody sandwich (DAS)-ELISA using a commercially available kit (Agdia Inc., Elkhart, IN). All tested samples were found positive in ELISA. IYSV infection was verified by reverse transcription (RT)-PCR. Total nucleic acids were prepared from symptomatic tissue, and primers specific to the small (S) RNA of IYSV were used to amplify an approximate 1.2-kb region of the S-RNA. This region included the complete nucleoprotein (N) gene (2). The amplicons from one sample each from Nevada and northern California were sequenced (GenBank Accession Nos. FJ713699 and FJ713700, respectively). Sequence analysis showed that the amplicons contained a single open reading frame of 822 bp, coding for a 273-amino acid N protein, and the gene shared 96 to 98% identity with known IYSV N gene sequences. To our knowledge, this is the first report of IYSV in onion in Nevada. In California, outbreaks of IYSV had been reported earlier in Imperial Valley and Antelope Valley in southern California (4), and the disease has been increasing in incidence in bulb and seed crops in northern California, as well. California and Nevada are major onion-producing states in the United States and regular surveys to determine the incidence and impact on yield are needed to develop an integrated disease management program. References: (1) D. H. Gent et al. Plant Dis. 90:1468, 2006. (2) H. R. Pappu et al. Arch. Virol. 151:1015, 2006. (3) H. R. Pappu and M. E. Matheron. Online publication. doi:10.1094/PHP-2008-0711-01-BR. Plant Health Progress, 2008. (4) G. J. Poole et al. Online publication. doi:10.1094/PHP-2007-0508-01-BR. Plant Health Progress, 2007.
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McDonald, V., S. Lynch, and A. Eskalen. "First Report of Neofusicoccum australe, N. luteum, and N. parvum Associated With Avocado Branch Canker in California." Plant Disease 93, no. 9 (2009): 967. http://dx.doi.org/10.1094/pdis-93-9-0967b.
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In 1953, branch cankers on California avocado (Persea americana Mill.) trees were attributed to a Botryosphaeria anamorph, Dothiorella gregaria (teleomorph B. ribis) (2), and the disease was known as Dothiorella canker. Since this time, it has been suggested that this fungus should probably be classified as Fusicoccum aesculi Corda (teleomorph B. dothidea) (3). To our knowledge, B. dothidea is the only reported Botryosphaeriaceae species causing Dothiorella canker on avocado in California. Between the summer of 2008 and the winter of 2009, five trees from each of eight avocado orchards in five counties (San Diego, Riverside, Ventura, Santa Barbara, and San Luis Obispo) were surveyed for Dothiorella canker symptoms to verify the associated Botryosphaeriaceae species. Typical Dothiorella canker symptoms observed included darkened and friable bark with a dried, white, powdery exudate. Underneath the bark, cankers were variable in shape and some penetrated into the heartwood. Small sections of tissue (0.5 cm2) were excised from two to four separate cankers per tree and placed onto potato dextrose agar amended with tetracycline (0.01%) (PDA-tet). The most frequently isolated fungi, based on general growth pattern, speed, and colony color, were in the Botryosphaeriaceae with the following percent recovery by county: Riverside–40 and 100% (site 1 and 2, respectively); San Diego–60% (site 3); Ventura–42 and 53% (site 4 and 5, respectively); Santa Barbara–33% (site 6); and San Luis Obispo–32 and 60% (site 7 and 8, respectively). Pycnidia of Botryosphaeriaceae species were also observed on old diseased avocado tree branches. Sequenced rDNA fragments (ITS1, 5.8S rDNA, ITS2, amplified with ITS4 and ITS5 primers) were compared with sequences deposited in GenBank. Four different Botryosphaeriaceae species were identified and included Neofusicoccum australe, B. dothidea, N. luteum, and N. parvum, with species nomenclature based on the work of Crous et al. (1). Pathogenicity tests were conducted in the greenhouse on 1-year-old avocado seedlings, cv. Hass, with one randomly chosen isolate from each of the Botryosphaeriaceae species noted above. Four replicate seedlings were stem-wound inoculated with a mycelial plug and covered with Parafilm. Sterile PDA plugs were applied to four seedlings as a control. Over a period of 3 to 6 months, seedlings were assessed for disease symptoms that included browning of leaf edges and shoot dieback. Mean vascular lesion lengths on stems were 64, 66, 64, and 18 mm for B. dothidea, N. parvum, N. luteum, and N. australe, respectively. Each fungal isolate was consistently reisolated from inoculated seedlings, thus fulfilling Koch's postulates. To our knowledge, this is the first report of N. australe, N. luteum, and N. parvum recovered from branch cankers on avocado in California. These results are significant because Botryosphaeriaceae canker pathogens are known to enter the host plant through fresh wounds (pruning, frost, and mechanical). With high-density planting becoming more common, which requires intensive pruning, the transmission rate of these pathogens could increase in California avocado groves. References: (1) P. W. Crous et al. Stud. Mycol. 55:235, 2006. (2) F. F. Halma and G. A. Zentmyer. Calif. Avocado Soc. Yearb. 38:156, 1953. (3) W. F. T. Hartill and K. R. Everett. N. Z. J. Crop Hortic. Sci. 30:249, 2002.
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Solheim, H., and M. Vuorinen. "First Report of Mycosphaerella pini Causing Red Band Needle Blight on Scots Pine in Norway." Plant Disease 95, no. 7 (2011): 875. http://dx.doi.org/10.1094/pdis-02-11-0129.
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During a survey conducted in August 2009 in northern Norway, symptoms typical for red band needle blight (1) were observed in four young Scots pine (Pinus sylvestris) stands. The stands, less than 15 years old, were located in humid sites near rivers in Bardu and Målselv municipalities, Troms County. Many of the oldest needles (2- to 3-yearsold) in the lower part of young trees were partially or completely brown, but still attached, and red bands could be observed. Aggregations of conidial stromata were often seen in the red bands. Conidia were hyaline, smooth, thin walled, and filiform, 1.9 to 2.6 μm wide and 12 to 36 μm long. Isolations were made from conidiomata and the identity of Mycosphaerella pini was confirmed by partial sequencing of the internal transcribed spacer (ITS) region of a sample from Målselv (69°00′N, 18°51′E) (GenBank Accession No. JF796109). In June 2010, a survey was done in southeastern Norway where nearly 100 stands with young Scots pine, up to 20 years old, were inspected and typical symptoms of red band needle blight were observed in 10 stands in three municipalities in Hedmark County (Eidskog, Kongsvinger, and Trysil), less than 25 km from the Swedish border, and in one stand in Buskerud County (Nedre Eiker). Lower branches of up to 5 m tall trees had symptoms of red band needle blight, mainly on the oldest needles. In the red bands, acervuli of Dothistroma septosporum, the anamorph of M. pini, appeared. Typical conidia from acervuli were germinated in water agar and resulting mycelium was transferred to modified orange serum agar. Two isolates were sequenced as above and both herbarium samples and isolates (Kongsvinger, 60°06′N, 12°04′E; GenBank Accession No. JF796108 and Trysil, 61°14′N, 12°22′E; GenBank Accession No. JF796107) were deposited at the Norwegian Forest and Landscape Institute. To fulfill Koch's postulates, symptoms were reproduced by artificial inoculation onto 1-year-old Scots pine seedlings. In June 2010, a pooled conidial suspension (2.4 to 3.8 × 103 conidia per ml) from two single-conidium cultures was sprayed to runoff onto 128 seedlings and 64 seedlings were mock sprayed with distilled water. First symptoms (brown segments and red bands) appeared on inoculated seedlings 1 month later and acervuli appeared after another 6 to 8 weeks. M. pini was reisolated from the acervuli. Three months after inoculation, 90% of inoculated seedlings showed symptoms while all uninoculated seedlings were healthy. Damage caused by M. pini has increased in the northern hemisphere during the last 15 to 20 years, possibly because of climate change (4). In 2006, the fungus was recorded in Estonia (2), in 2008 in Finland (3), and by 2009, the disease had spread over large areas in Finland including the region near the Norwegian border in the north. The disease has been in Sweden for a few years (J. Stenlid, personnel communication). In southern Norway, the disease has mainly been observed near the Swedish border so here the disease may originate from Sweden. So far, however, only small areas of Norway have been surveyed. Both natural spread and human transport dissemination may be occurring. References: (1) Anonymous. OEPP/EPPO Bull. 35, 303, 2005. (2) M. Hanso and R. Drenkhan. Plant Pathol. 57:170, 2008. (3) M. Müller et al. Plant Dis. 93:322, 2009. (4) A. Woods et al. BioScience 55:761, 2005.
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Wu, D. D., G. Fu, Y. F. Ye, et al. "First Report of Neofusicoccum parvum Causing Panicle Blight and Leaf Spot on Vitis heyneana in China." Plant Disease 99, no. 3 (2015): 417. http://dx.doi.org/10.1094/pdis-05-14-0515-pdn.
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The climbing vine, Vitis heyneana Roem. & Schult, is a member of the grape family endemic to Asia. Its fruits are used in wine production, and its roots, stems, and leaves can be used in medicinal materials. This plant is grown in Southwest China, as well as in India, Bhutan, and Nepal. Mulao Autonomous County in Guangxi Province is the only artificial cultivation area in China. During the summer of 2013, a panicle blight and leaf spot were detected on V. heyneana on four farms in Mulao Autonomous County. The symptoms were observed from the onset of florescence through fruit harvest. Brown lesions initially appeared at the base of a panicle and then extended to the whole panicle, finally causing the panicle to die and fruit to drop. When the disease developed on leaves, the symptom initially appeared as small dark brown circular spots, later enlarging into irregular spots (average diameter 6 mm) with a light brown center and dark brown rim. With severe disease, some individual leaves were affected by numerous spots, leading to premature senescence. Small sections of diseased tissue excised from 10 panicle and 10 leaf samples were plated on potato dextrose agar (PDA) and incubated at 28°C. Fungal colonies developed, initially with abundant white aerial mycelium, which turned olivaceous gray after 5 days and formed black pycnidia after 25 days. The conidia were hyaline, ellipsoidal to fusiform, externally smooth, thin-walled, and nonseptate. Thirty conidia were measured; the dimensions were 12.0 to 17.5 × 4.0 to 6.0 μm. Morphological characteristics of the isolates were similar to the descriptions of Neofusicoccum parvum (3). The isolate MPT-1 was selected as a representative for molecular identification. Genomic DNA was extracted and used for PCR to amplify the internal transcribed spacer (ITS) region and partial translation elongation factor 1-alpha (EF1-α) gene, using primers ITS1/ITS4 and EF1-728F/EF1-986R, respectively. The obtained ITS sequence (GenBank Accession No. KJ599627) and EF1-α sequence (KM921768) showed >99% homology with several GenBank sequences of N. parvum. Morphological and molecular results confirmed the isolate as N. parvum. For pathogenicity tests, detached, young healthy panicles and leaves of V. heyneana were surface-sterilized, wounded by sterile needle, and inoculated with mycelial plugs (3 mm in diameter) of four N. parvum isolates. Ten panicles and 10 leaves were used for every isolate. Control panicles and leaves were treated with sterile PDA plugs. All the samples were placed in a humid chamber (RH 90%, 28°C, 12 h of light) for 3 days. Symptoms similar to those observed in the field developed on all panicles and leaves inoculated with N. parvum isolates. N. parvum was reisolated from all inoculated, symptomatic tissues. The controls remained symptomless. N. parvum has been reported to cause trunk canker on V. vinifera (2), dieback on Cupressus funebris (3), and a leaf spot on Myristica fragrans (1). To our knowledge, this is the first report of N. parvum causing panicle blight and leaf spot on V. heyneana in China. Panicle blight caused a large number of fruits to drop and reduced the yield seriously. Some effective measures should be taken to control this disease. References: (1) V. Jayakumar et al. New Dis. Rep. 23:19, 2011. (2) J. Kaliternam et al. Plant Dis. 97:1656, 2013. (3) S. B. Li et al. Plant Dis. 94:641, 2010.
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Ploetz, R. C., J. E. Peña, J. A. Smith, et al. "Laurel Wilt, Caused by Raffaelea lauricola, is Confirmed in Miami-Dade County, Center of Florida's Commercial Avocado Production." Plant Disease 95, no. 12 (2011): 1589. http://dx.doi.org/10.1094/pdis-08-11-0633.
Full textAbstract:
Laurel wilt, caused by Raffaelea lauricola, threatens native and nonnative species in the Lauraceae in the southeastern United States, including the important commercial crop, avocado, Persea americana (2,4). Although the pathogen's vector, Xyleborus glabratus, was detected in Miami-Dade County, FL in January 2010, laurel wilt had not been reported (4). In February 2011, symptoms of the disease were observed on native swampbay, P. palustris, in Miami-Dade County (25°72′N, 80°48′W). Externally, foliage was brown, necrotic, and did not abscise; internally, sapwood was streaked with dark gray-to-bluish discoloration; and, in dead trees, holes of natal galleries of the vector from which columns of frass were attached were evident. On a semiselective medium for R. lauricola, a fungus with the pathogen's phenotype was isolated from symptomatic sapwood. Colonies were slow growing, light cream in color, with dendritic, closely appressed mycelium and often a slimy surface. A representative strain of the fungus was further identified with PCR primers for diagnostic small subunit (SSU) rDNA (1) and its SSU sequence (100% match, GenBank Accession No. JN578863). In each of two experiments, plants of ‘Simmonds’ avocado, the most important cultivar in Florida, were inoculated with three strains of the fungus, as described previously (3). Symptoms of laurel wilt developed in all inoculated plants and the fungus was recovered from each. After aerial and further ground surveys, additional symptomatic swampbay trees, some of which had defoliated, were detected in the vicinity of the original site. Since swampbay defoliates only a year or more after symptoms develop (4), the 2010 detection of X. glabratus may have coincided with an undetected presence of the disease. As of July 2011, a 6-km-diameter disease focus was evident in the area, the southernmost edge of which is 5 km from the nearest commercial avocado orchard. In August 2011, a dooryard avocado tree immediately north of the above focus was affected by laurel wilt, and an SSU sequence confirmed the involvement of R. lauricola (GenBank Accession No. JN613280). The outbreak of laurel wilt in Miami-Dade County represents a 150 km southerly jump in the distribution of this disease in the United States ( http://www.fs.fed.us/r8/foresthealth/laurelwilt/dist_map.shtml ) and is the first time this disease has been found in close proximity to Florida's primary commercial avocado production area. Approximately 98% of the state's commercial avocados, worth nearly $54 million per year, are produced in Miami-Dade County. Since effective fungicidal and insecticidal measures have not been developed for large, fruit-bearing trees, mitigation efforts will focus on the rapid identification and destruction of infected trees (3,4). References: (1) T. J. Dreaden et al. Phytopathology 98:S48, 2008. (2) S. W. Fraedrich et al. Plant Dis. 92:215, 2008. (3) R. C. Ploetz et al. Plant Dis. 95:977, 2011. (4) R. C. Ploetz et al. Recovery Plan for Laurel Wilt of Avocado. National Plant Disease Recovery System, USDA, ARS, 2011.
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Chirchir, J., G. Chemining’wa, F. Nzuve, and R. Murori. "Yield response of selected irrigated rice varieties to varying N, P and K fertilizer regimes." International Journal of Agricultural Research, Innovation and Technology 8, no. 2 (2018): 42–46. http://dx.doi.org/10.3329/ijarit.v8i2.40554.
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Rice production has been inconsistent in Mwea irrigation scheme due to poor crop management practices and reduced soil fertility. Proper rice nutrition conserves the environment, increases sustained crop production, farmer’s crop yield and profits. A field experiment was conducted at MIAD Center, in Kirinyaga County, during 2016-17 and 2017- 18 to determine the response of rice varieties to different N, P and K fertilizer treatments. The trial was conducted in randomized complete block design, with three replications of 13 N, P and K fertilizer regimes as the main plots treatments and varieties Basmati 370 and BW 196 as the sub-plot treatment. The N kg ha-1: P2O5 kg ha-1: K2O kg ha-1 fertilizer treatment ratios used were: 00:00:00, 60:40:40, 80:60:60, 100:80:80, 60:40:00, 80:60:00, 100:80:00, 60:00:40, 80:00:60, 100:00:80, 00:40:40, 00:60:60 and 00:80:80. Plant height, number of tillers hill-1, panicle length, and grain yield responded positively to fertilizer application, but 1000-grain weight did not. Variety BW 196 recording shorter plants and panicles, more tillers hill-1, higher grain weight and yield than variety Basmati 370. 00:40:40, 00:60:60, 00:80:80, 60:40:00 and the no-fertilizer control treatments recorded the least number of tillers hill-1. 60:40:40, 80:60:60, 100:80:80, fertilizer treatments had longer panicles than the no fertilizer control and 00:40:40. Except for 100:80:00 and 00:40:40, in the first season and 60:40:00, 80:60:00, 100:80:00 in the second season, all the fertilizer regimes increased grain yield relative to the control. The highest grain yield was realized in fertilizer regime 80:60:60, 100:80:80, 80:00:60 and 100:00:80. 80:00:60 is the recommended fertilizer regime.
Int. J. Agril. Res. Innov. & Tech. 8 (2): 42-46, December, 2018
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Szalanski, A. L., P. G. Mullin, T. S. Harris, and T. O. Powers. "First Report of Columbia Root Knot Nematode (Meloidogyne chitwoodi) in Potato in Texas." Plant Disease 85, no. 4 (2001): 442. http://dx.doi.org/10.1094/pdis.2001.85.4.442d.
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Columbia root-knot nematode, Meloidogyne chitwoodi Golden et al. (1) was identified from potatoes, Solanum tuberosum L., collected from Dallam County, Texas in October 2000. Seed potatoes are the most likely source for this introduction. This nematode is currently found infecting potatoes grown in California, Colorado, Idaho, New Mexico, Nevada, Oregon, Utah, and Washington. Some countries prohibit import of both seed and table stock potatoes originating in states known to harbor M. chitwoodi. Lesions on the potatoes had discrete brown coloration with white central spots in the outer 1 cm of the tuber flesh. Female nematode densities averaged 3 per square centimeter of a potato section beneath the lesions. Nematodes were morphologically identified as M. chitwoodi based on the perineal pattern of mature females and the tail shape of juveniles per Golden et al. (1). Using polymerase chain reaction-RFLP of the rDNA ITS1 region and the mtDNA COII-16S rRNA region (2), individual juveniles were identified as M. chitwoodi based on their restriction fragment patterns. This is the first report of Columbia root-knot nematode infecting potatoes in Texas. The distribution of this nematode in potato fields throughout central United States should be determined. References: (1) A. N. Golden et al. J. Nematol. 12:319, 1980. (2) T. O. Powers and T. S. Harris. J. Nematol. 25:1, 1993.