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Journal articles on the topic 'San luis obispo county (calif.)'

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Published: 4 June 2021
Last updated: 28 January 2023

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1

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 (September 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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2

Herring, Kaylee Scoggins. "History Center of San Luis Obispo County." California History 96, no. 1 (2019): 62–64. http://dx.doi.org/10.1525/ch.2019.96.1.62.

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3

ROTH, BARRY, and JEFF TUPEN. "Revision of the systematic status of Helminthoglypta walkeriana morroensis (Hemphill, 1911) (Gastropoda: Pulmonata)." Zootaxa 616, no. 1 (August 25, 2004): 1. http://dx.doi.org/10.11646/zootaxa.616.1.1.

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Globose-shelled to depressed-helicoid terrestrial snails of the subgenus Helminthoglypta (Charodotes) occur from the vicinity of Morro Bay to the City of San Luis Obispo in San Luis Obispo County, central California, USA. Populations with intensely papillose shells largely or entirely lacking incised spiral sculpture, originally described as "Helix var. morroensis," have been regarded as either a subspecies of Helminthoglypta walkeriana (Hemphill, 1911) or an infrasubspecific variation without taxonomic significance. Shell form variation is distributed as one would expect if the two major aggregations of individuals were reproductively isolated, biological species, H. walkeriana and H. morroensis (Hemphill, 1911). Differing penial morphology is also consistent with reproductive isolation. The two species appear to be allopatric.
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Hardy, Terry. "Unintended Consequences." Journal of System Safety 51, no. 3 (October 1, 2015): 16. http://dx.doi.org/10.56094/jss.v51i3.145.

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On October 21, 2008, Reactor Unit 2 at the Diablo Canyon Power Plant in San Luis Obispo County, California was manually scrammed when operators detected inadequate flow of cooling water to the circulating water system. The power plant obtained cooling water from the Pacific Ocean. The water entered an intake structure by passing through bar racks, and then flowed through traveling screen assemblies. The bar racks and screens prevented debris and sea life from entering the circulating water pumps.
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5

Garner, Lauren C. "Meeting Learning Objectives through Service-Learning: A Pomology Case Study." HortTechnology 21, no. 1 (February 2011): 119–25. http://dx.doi.org/10.21273/horttech.21.1.119.

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Undergraduate students enrolled in the introductory pomology course at California Polytechnic State University, San Luis Obispo, CA, from 2007 to 2010, participated in a service-learning project. Students helped the community organization, the California Rare Fruit Growers (CRFG), teach grafting skills to San Louis Obispo County high school students and community members. At the end of each quarter, pomology students completed evaluations of their experience. Results of these evaluations were used to improve teaching methodology and the experience in which the students participated. Self-reported and instructor evaluations of the service-learning project demonstrated that students increased their grafting knowledge and skills, their confidence in learning new skills, and their interest in fruit science and community involvement. The service-learning project enabled students to meet course learning objectives of understanding and becoming experienced in horticultural techniques, such as grafting, and to meet university learning objectives of developing critical thinking and communication skills and increasing community involvement.
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6

Jankovitz, Kristine Z., Karen J. McGaughey, Kyla Tom, Dayna Ravalin, and Ann Yelmokas McDermott. "Prevalence of Overweight and Obesity in Hispanic Preschool Children in San Luis Obispo County, California." Californian Journal of Health Promotion 10, SI-Latino (December 1, 2012): 114–22. http://dx.doi.org/10.32398/cjhp.v10isi-latino.1488.

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The purpose of the study was to determine the prevalence of overweight and obese (OW/OB) preschool children in San Luis Obispo County. Preschool children ages 3-5 years were measured for height and weight in 2006 (n = 482) and in 2009/10 combined (n = 559). The CDC BMI calculator for ages 2-20 was used to determine BMI classification. In 2006, 26.4% were OW/OB and by 2009/10, 34.8% were OW/OB. Rates were similar among boys and girls (p = 0.70) and increased significantly over time (p = 0.0070). Caucasian and Hispanic children had similar OW/OB rates in 2006, but by 2009/10 the Hispanic children were 2.7 times more likely to be obese (CI: 1.68, 4.57). Because Hispanic children were more likely to attend Head Start or California State preschools versus private preschools (78.0%, 81.0% and 7.4% respectively), it appears Head Start and California State preschools would be a likely place for interventions directed to meet the needs of Hispanic preschoolers, and may serve to reverse the trend in childhood obesity and address the disparity in weight status among Hispanic preschool aged children.
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7

Dale, Lyle A. "Rough Justice: Felony Crime and the Superior Court in San Luis Obispo County, 1880-1910." Southern California Quarterly 76, no. 2 (1994): 195–216. http://dx.doi.org/10.2307/41171713.

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8

Clark, Howard O., and Helen K. Pigage. "New Flea (Siphonaptera) Record For Heermann's Kangaroo Rat (Dipodomys heermanni), San Luis Obispo County, California." Western North American Naturalist 74, no. 3 (November 2014): 364–65. http://dx.doi.org/10.3398/064.074.0311.

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9

Jain, Prakrit, Harper Forbes, and Lauren A. Esposito. "Two new alkali-sink specialist species of Paruroctonus Werner 1934 (Scorpiones, Vaejovidae) from central California." ZooKeys 1117 (August 15, 2022): 139–88. http://dx.doi.org/10.3897/zookeys.1117.76872.

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Herein we describe two new species of Paruroctonus (Werner 1934) from California: Paruroctonus sodasp. nov. from the Soda Lake playa at the center of the Carrizo Plain in San Luis Obispo county and Paruroctonus conclusussp. nov. from the Koehn Lake playa in the Mojave Desert of Kern County. They can be differentiated from other Paruroctonus by a combination of morphological features including deeply scalloped pedipalp fingers in males, specific patterns of fuscous pigmentation, unique setal counts, and unique morphometric ratios. They can also be separated from one another by the latter three characters. Photographs of a large selection of live scorpions are provided, including detailed images and figures of many morphological features. Their distributions, habitats, and ecologies are discussed; and important steps towards their conservation are described.
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Jankovitz, Kristine Z., Alison K. Ventura, Trevor M. Curry, Victoria B. Howarth, Caitlin C. Moran, Robin M. Mertens, Leland A. Bailey, Kristen Thompson, and Karen McGaughey. "Prevalence and Correlates of Overweight and Obesity among Preschool-Aged Children in San Luis Obispo County, 2006-2014." Californian Journal of Health Promotion 16, no. 1 (June 1, 2018): 66–72. http://dx.doi.org/10.32398/cjhp.v16i1.2125.

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Background and Purpose: National prevalence of overweight and obesity (OW/OB) among children remains high; surveillance of OW/OB at state- and local-levels is needed. This study determines the prevalence and sociodemographic predictors of OW/OB among preschool-age children in San Luis Obispo (SLO) County. Methods: Cross-sectional convenience samples of Head Start, California State, and private preschools were surveyed in 2006 (n=482), 2009/10 (n=559), and 2014 (n=442). At all waves, preschool children aged 3-5 years were measured for height and weight using standardized stadiometer and digital scale protocols. In 2014, parents completed a demographics questionnaire. Results: Children assessed in 2009/10 and 2014 were more likely to be OW/OB than those assessed in 2006 (p=0.016). Unadjusted, bivariate odds ratios illustrated increased risk for OW/OB was associated with Hispanic ethnicity, residing in a lower income household, attending preschool in southern SLO County, and participation in a Head Start preschool. In the adjusted, multivariable model, increased risk for OW/OB was associated with attending preschool in SLO City and participation in a California State or Head Start preschool. Conclusion: OW/OB trends in SLO County are similar to national trends. Programs to continue to monitor and reduce socioeconomic disparity in OW/OB prevalence among young children are needed.
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Tabor, Stephen P., Daniel F. Williams, David J. Germano, and Rex E. Thomas. "Fleas (Siphonaptera) Infesting Giant Kangaroo Rats (Dipodomys ingens) on the Elkhorn and Carrizo Plains, San Luis Obispo County, California." Journal of Medical Entomology 30, no. 1 (January 1, 1993): 291–94. http://dx.doi.org/10.1093/jmedent/30.1.291.

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12

Niccum, Elizabeth M., Donald E. Lehrman, and William R. Knuth. "The Influence of Meteorology on the Air Quality in the San Luis Obispo County-Southwestern San Joaquin Valley Region for 3–6 August 1990." Journal of Applied Meteorology 34, no. 8 (August 1995): 1834–47. http://dx.doi.org/10.1175/1520-0450(1995)034<1834:tiomot>2.0.co;2.

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13

Sinha, Parikhit, Beth Hoffman, John Sakers, and LynneDee Althouse. "Best Practices in Responsible Land Use for Improving Biodiversity at a Utility-Scale Solar Facility." Case Studies in the Environment 2, no. 1 (2018): 1–12. http://dx.doi.org/10.1525/cse.2018.001123.

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Development of a utility-scale solar photovoltaic project involves management of various potential environmental impacts, including impacts on wildlife and habitat. Although solar facility construction activities do involve short-term disturbance, responsibly developed solar power plants can provide shelter, protection, and stable use of land to support biodiversity. Land use practices and their relationship to biodiversity are examined at one of the world’s largest solar facilities, the 550 MW Topaz Solar Farms project in San Luis Obispo County, CA, USA. Pre- and postconstruction biological monitoring data indicate similar to higher vegetation productivity on-site compared to reference sites. Postconstruction monitoring has documented the presence of dozens of wildlife species, including several with special conservation status. Best practices in responsible land use utilized in the Topaz project are specified in the categories of community, biology, water, design and construction, and end of life. These practices, as well as future solar project development innovations that reduce ground disturbance, can be applied to enhance biodiversity at other solar facilities.
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14

DeCarli, P., F. Rivera, W. Brown, and Mark Gaskell. "208 Evaluation of Vegetable Soybean Cultivars from a Range of Maturity Groups for Edamame Production in California." HortScience 34, no. 3 (June 1999): 478A—478. http://dx.doi.org/10.21273/hortsci.34.3.478a.

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Coastal California vegetable growers produce a wide range of specialty crops for diverse domestic and export markets. Vegetable-type soybean (Glycine max L.) cultivars are grown and consumed fresh in many parts of the world, but particularly in Japan and Asia, where they are known as edamame. Traditional soybean maturity group classification may not be applicable for fresh-market edamame, particularly in mild coastal California growing conditions. We evaluated a total of 55 vegetable soybean cultivars during the 1998 growing season from maturity groups ranging from group 00 to group VI. Replicated field plots were planted on 30-31 May 1998 in San Luis Obispo, Calif. (lat. 35.12°N.). Cultivars from maturity Groups 00 and I began producing on 4 Sept., followed in 7 to 10 days by maturity Group II and III, and by harvest of maturity Group III and IV cultivars on 19 Sept. Harvest of Group IV cultivars continued until 24 Oct. Percent marketable (two- and three-seeded) pods ranged from 86% to 17% among the cultivars. Marketable yields ranged more than 15-fold, with cultivars such as `Sapporo Midori', a group 00 cultivar popular in Japan, producing 348 g/plant, to cultivars such as `Early Hakucho' and `Envy' producing 20 and 5 g plant, respectively.
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15

McCrink, Timothy P., Chris J. Wills, Charles R. Real, and Michael W. Manson. "Effects of Topographic Position and Geology on Shaking Damage to Residential Wood-Framed Structures during the 2003 San Simeon Earthquake, Western San Luis Obispo County, California." Earthquake Spectra 26, no. 3 (August 2010): 779–802. http://dx.doi.org/10.1193/1.3459160.

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A statistical evaluation of shaking damage to wood-framed houses caused by the 2003 M6.5 San Simeon earthquake indicates that both the rate and severity of damage, independent of structure type, are significantly greater on hilltops compared to hill slopes when underlain by Cretaceous or Tertiary sedimentary rocks. This increase in damage is interpreted to be the result of topographic amplification. An increase in the damage rate is found for all structures built on Plio-Pleistocene rocks independent of topographic position, and this is interpreted to be the result of amplified shaking caused by geologic site response. Damage rate and severity to houses built on Tertiary rocks suggest that amplification due to both topographic position and geologic site response may be occurring in these rocks, but effects from other topographic parameters cannot be ruled out. For all geologic and topographic conditions, houses with raised foundations are more frequently damaged than those with slab foundations. However, the severity of damage to houses on raised foundations is only significantly greater for those on hill slopes underlain by Tertiary rocks. Structures with some damage-resistant characteristics experienced greater damage severity on hilltops, suggesting a spectral response to topographic amplification.
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Li, Hui, John Harvey, Zhang Chen, Yuan He, Thomas J. Holland, Steve Price, and Kelly McClain. "Measurement of Pavement Treatment Macrotexture and Its Effect on Bicycle Ride Quality." Transportation Research Record: Journal of the Transportation Research Board 2525, no. 1 (January 2015): 43–53. http://dx.doi.org/10.3141/2525-05.

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This paper summarizes the results of measurements of macrotexture on a set of California Department of Transportation (Caltrans) and local government pavement surface treatments and their correlation with survey results of bicycle vibration and ride quality on the same sections. The test sections that were used for the bicycle vibration and ride quality measurements included various surface treatments placed on an existing chip seal on SR-198 in Monterey County, a chip seal on SR-1 in San Luis Obispo County, and several other sections with various textures and roughness levels on other state highway and county road sections. Macrotexture was measured in mean profile depth (MPD). Three test methods were used to measure MPD: the sand patch, the laser texture scanner, and the inertial profiler. Presented are statistical correlations between macrotexture, roughness [according to the international roughness index (IRI)], bicycle vibration, and bicycle ride quality for the surveyed treatment sections. Conclusions are presented for MPD values measured on road sections with different treatment designs and for the variability of MPD found between sections built with the same chip seal aggregate grading. Correlations between bicycle vibration and MPD are presented, along with correlations between MPD, IRI, bicycle vibration, and bicyclists' perception of ride quality and pavement acceptability for bicycle use. This study's results can assist Caltrans and other road owners considering gradation when continuing to use the cost-effective chip seal treatment to preserve their pavements while maintaining a bicycle-friendly surface.
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Matlock, Melissa, Suellen Hopfer, and Oladele A. Ogunseitan. "Communicating Risk for a Climate-Sensitive Disease: A Case Study of Valley Fever in Central California." International Journal of Environmental Research and Public Health 16, no. 18 (September 5, 2019): 3254. http://dx.doi.org/10.3390/ijerph16183254.

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Valley Fever, or Coccidioidomycosis, a fungal respiratory disease, is prevalent with increasing incidence in the Southwestern United States, especially in the central region of California. Public health agencies in the region do not have a consistent strategy for communication and health promotion targeting vulnerable communities about this climate-sensitive disease. We used the behavior adaptation communication model to design and conduct semi-structured interviews with representatives of public health agencies in five California counties: Fresno, Kern, Kings, San Luis Obispo, and Tulare County. While none of the agencies currently include climate change information into their Valley Fever risk messaging, the agencies discuss future communication methods similar to other health risk factors such as poor air quality days and influenza virus season. For political reasons, some public health agencies deliberately avoided the use of climate change language in communicating health risk factors to farmers who are particularly vulnerable to soil and dust-borne fungal spores. The effectiveness of health communication activities of the public health agencies has not been measured in reducing the prevalence of Valley Fever in impacted communities. Given the transboundary nature of climate influence on Valley Fever risk, a concerted and consistent health communication strategy is expected to be more effective than current practices.
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Menz, Myles H. M., Brian V. Brown, and Karl R. Wotton. "Quantification of migrant hoverfly movements (Diptera: Syrphidae) on the West Coast of North America." Royal Society Open Science 6, no. 4 (April 2019): 190153. http://dx.doi.org/10.1098/rsos.190153.

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The seasonal migration of huge numbers of hoverflies is frequently reported in Europe from mountain passes or spurs of land. The movement of such large numbers of beneficial insects is thought to provide significant ecosystem services in terms of pollination and pest control. Observations from the East Coast of the USA during the 1920s indicate the presence of migratory life histories among some hoverfly species there, but 90 years have now passed since the last reported observation of hoverfly migration in the USA. Here, we analyse video footage taken during a huge northward migration of hoverflies on 20 April 2017 on the West Coast of California. The quantification of migrant numbers from this footage allows us to estimate the passage of over 100 000 hoverflies in half an hour over a 200 m section of headland in Montaña de Oro State Park (San Luis Obispo County). Field collections and analysis of citizen science data indicate different species from the previously reported Eristalis tenax migrations on the East Coast of the USA and provide evidence for migration among North American hoverflies. We wish to raise awareness of this phenomenon and suggest approaches to advance the study of hoverfly migration in North America and elsewhere.
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Cantu, D. A. "America The Bountiful. San Luis Obispo, Calif.: Vocational Education Productions, 1992. Video Tape Series. Each video tape may be purchased individually for $89.95, or the entire six tape series for $375." OAH Magazine of History 8, no. 1 (September 1, 1993): 60–61. http://dx.doi.org/10.1093/maghis/8.1.60-a.

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Kellar, James H. "Petroglyphs of Ohio. James L. Swauger Ohio University Press, Athens, 1984. xxi + 340 pp., figures, appendices, literature cited, index. $44.95 (cloth). - Papers on Chumash Rock Art. Joseph Alioto Georgia Lee, Travis Hudson, Kathleen Conti, Janice Timbrook, and Katherine Bracher. Occasional Paper 12, San Luis Obispo County Archaeological Society, San Luis Obispo, 1984. 102 pp., figures, tables, references. $14.00 (paper)." American Antiquity 51, no. 1 (January 1986): 205. http://dx.doi.org/10.2307/280435.

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Úrbez-Torres, J. R., W. D. Gubler, and J. Luque. "First Report of Botryosphaeria iberica and B. viticola Associated with Grapevine Decline in California." Plant Disease 91, no. 6 (June 2007): 772. http://dx.doi.org/10.1094/pdis-91-6-0772c.

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Grapevine decline symptoms in California include dead spurs and cordon and trunk dieback due to canker formation in the vascular tissue. Seven Botryosphaeria spp. are known to be associated with grapevine cankers in California, viz. Botryosphaeria australis, B. dothidea, B. lutea, B. obtusa, B. parva, B. rhodina, and B. stevensii (3). Recently, B. iberica and B. viticola also were isolated from grapevine cankers in a field survey that was conducted throughout California. Identification was based on morphological comparisons along with DNA analyses with previously identified isolates from Spain (1,2): B. iberica (CBS115035, ex-type) and B. viticola (CBS117006 and CBS117009, ex-type). DNA sequences of the rDNA internal transcribed spacer region (ITSI-5.8S-ITS2), part of the β-tubulin gene (BT2), and part of the translation elongation factor 1-α gene (EF1-α) from B. iberica and B. viticola isolates from California were amplified using primers ITS4/ITS5, Bt2a/Bt2b, and EF-728F/EF-986R, respectively. All DNA sequences of B. iberica and B. viticola from California showed 99 to 100% homology with those previously identified and deposited in GenBank. B. iberica, isolated from grapevine cankers from San Luis Obispo County (central coast), formed colonies on potato dextrose agar (PDA) that were dark green with aerial mycelium, optimum growth at 20 to 25°C, and formed pycnidia after 15 days of incubation at 25°C. Conidia were brown, one-septate, oblong to ovoid with a rounded apex, and measured (20.1-) 22.5 to 23.5 (-27.1) × (8.1) 9.3 to 9.8 (-11.2) μm, length/width ratio = 2.4 (n = 60). B. viticola, isolated from grapevine cankers in Sonoma (north coast), San Luis Obispo, Santa Barbara (south coast), Riverside (southern California), and Yolo (Sacramento Valley) counties, formed colonies on PDA that were dark green to grayish with aerial mycelium, optimum growth at 25°C, and formed pycnidia after 2 weeks. Conidia were brown, one-septate, oval to oblong, and measured (16.6-) 19.3 to 20.3 (-23.5) × (8.1) 9.3 to 9.6 (-11.1) μm, length/width ratio = 2.1 (n = 60). Two isolates of each species were used to complete pathogenicity tests (B. iberica: ATCC MYA-4110, ATCC MYA-4111; B. viticola: ATCC MYA-4115, ATCC MYA-4116). Ten fresh pruning wounds on 15-year-old cv. Zinfandel vines were inoculated per isolate using 50 μl of a 5 × 106 conidia per ml suspension. Twenty control pruning wounds were inoculated with the same amount of sterile water. Twelve months after inoculation, all wood inoculated with B. iberica and B. viticola showed internal necrosis extending 35 to 50 and 30 to 35 mm from the point of inoculation, respectively. Necrosis and extent of vascular discoloration in infected wounds was significantly greater (P < 0.05) than in control inoculations (6.5 mm). B. iberica and B. viticola were reisolated from the necrotic region surrounding all inoculation sites. Representative isolates of B. iberica and B. viticola from California were deposited at the American Type Culture Collection (B. iberica: MYA-4110, MYA-4111; B. viticola: MYA-4112 to MYA-4116). Sequences from the studied DNA regions of all isolates were deposited at GenBank. To our knowledge, this is the first report implicating either species as a cause of grapevine decline in California and B. iberica as a pathogen of Vitis vinifera anywhere in the world. References: (1) J. Luque et al. Mycologia 97:1111, 2005. (2) A. J. L. Phillips et al. Mycologia 97:513, 2005. (3) J. R. Úrbez-Torres et al. Plant Dis. 90:1490, 2006.
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Owen, Buzz. "The “Cambrian Explosion” – a study of the abnormally large population of Haliotis kamtschatkana kamtschatkana / kamtschatkana assimilis “intergrades” following species decline due to several years of unusually warm temperatures in San Luis Obispo County, California." Festivus 48, no. 3 (August 1, 2016): 159–65. http://dx.doi.org/10.54173/f483159.

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Villablanca, Francis X., Christopher P. Kofron, Lauralea Oliver, Michael J. Walgren, Lisa E. Andreano, and Alexandra Thiel. "Survey for Morro Bay Kangaroo Rat: A Rare Mammal of Uncertain Status." Journal of Fish and Wildlife Management 12, no. 1 (November 23, 2020): 263–70. http://dx.doi.org/10.3996/jfwm-20-022.

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Abstract The Morro Bay kangaroo rat Dipodomys heermanni morroensis is a small, nocturnal, burrowing rodent endemic to the vicinity of Morro Bay in San Luis Obispo County, California. It was listed as endangered pursuant to the U.S. Endangered Species Act in 1973. Despite many searches over three decades, the Morro Bay kangaroo rat has not been captured or sighted in the wild since 1986. While recognizing that the Morro Bay kangaroo rat may be extinct, two of us in a previous paper also speculated it may be persisting at extremely low density in isolated colonies and recommended surveying with wildlife scent-detection dogs and baited camera traps. We searched with a wildlife scent-detection dog and baited camera traps in four historically occupied areas and detected no Morro Bay kangaroo rats. Unfortunately, our data combined with all other existing data do not allow us to conclude whether the Morro Bay kangaroo rat is extinct or extant. Essentially, the International Union for the Conservation of Nature international standard has not been met to make a definitive determination of extinction. That is, a species should be considered extinct only when there is no reasonable doubt that the last individual has died. We acknowledge that because of resource limitation we surveyed only a small sample of the numerous patches of habitat in the expansive landscape. Further, we now consider the Morro Bay sand spit (total area 4.35 km2, foredunes 3.75 km2), a peripheral area, as potentially part of the geographic range with suitable habitat, and it has never been searched. Therefore, considering all available information, we conclude that the Morro Bay kangaroo rat must be considered as possibly extant. We recommend that search efforts continue in several specific areas, including the Morro Bay sand spit. If the Morro Bay kangaroo rat still exists, it will be challenging and difficult to rediscover because of its likely low density and patchy distribution in the expansive landscape, combined with its small size, nocturnal nature, and secretive lifestyle.
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24

Adesemoye, A. O., and A. Eskalen. "First Report of Spencermartinsia viticola, Neofusicoccum australe, and N. parvum Causing Branch Canker of Citrus in California." Plant Disease 95, no. 6 (June 2011): 770. http://dx.doi.org/10.1094/pdis-02-11-0092.

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Dothiorella gummosis and canker on citrus is generally viewed as a minor disease but can result in serious decline of trees. Symptoms, mostly found on branches, include grayish-to-brown cast on cankered bark, which can extend into the xylem. Dothiorella gummosis was earlier believed to be caused by Dothiorella gregaria (2). In a continuing survey on citrus in six California counties (Fresno, Riverside, San Diego, San Luis Obispo, Tulare, and Ventura) in 2010, branch cankers were collected. Small pieces of symptomatic tissues were plated onto potato dextrose agar amended with 0.01% tetracycline (PDA-tet) and incubated at 25°C for 4 days. Fungi most frequently isolated were initially identified as Botryosphaeriaceae based on morphological characters (1,3). Total genomic DNA was PCR amplified with primers Bt2a/2b for the β-tubulin (BT); EF1-728F/986R for the elongation factor α-1 (EF); and ITS4/5 for the internal transcribed spacer ITS1-5.8S-ITS2 regions (3). Sequences were compared in a BLAST search. Spencermartinsia viticola UCP105 was isolated from cv. Parent Washington on Sour Orange rootstock in Tulare County, Neofusicoccum australe UCR1110 from cv. Satsuma in Riverside County, and N. parvum UCR1166 from cv. Meyer Lemon on Volkameriana rootstock in Ventura County. Sequences of UCP105, UCR1110, and UCR1166 have been deposited in GenBank under Accession Nos. JF271766, JF271776, and JF271780 for BT; JF271784, JF271793, and JF271796 for EF; and JF271748, JF271758, and JF271762 for the ITS regions. The sequences matched with isolates in GenBank as follows: ITS region of strain UCP105—98% match with Accession Nos. AY905556–8; BT of strain UCR1110—99% with GU251879–80; and EF of strain UCR1166—98% with GU251238. Pathogenicity tests were conducted by inoculating green shoots of healthy citrus trees similar to cultivar/rootstock from which each isolate was obtained. Fresh wounds were made on 1-year-old citrus shoots with a 3-mm cork borer, and the freshly wounded surfaces were inoculated with 3-mm mycelial plugs from 5-day-old cultures on PDA-tet. Control shoots were inoculated with sterile agar plugs and each treatment had 10 replicates. Inoculated wounds and shoot ends were covered with petroleum jelly and wrapped with Parafilm to prevent desiccation. Shoots were incubated at 25°C in moist chambers for 4 weeks. Lesions were observed on all inoculated shoots except for the control. Mean lesion lengths were 6.4, 7.0, and 6.9 cm for UCP105, UCR1110, and UCR1166, respectively, which were significantly (P = 0.05) different from the control (0.8 cm). The three isolates were reisolated from symptomatic tissues of inoculated shoots to confirm their pathogenicity. This test was repeated and similar results were obtained. Results indicate that there are multiple species in the Botryosphaeriaceae family causing symptoms on citrus that were previously believed to be caused by D. gregaria. To our knowledge, this is the first report of S. viticola, N. australe, and N. parvum on citrus in California. References: (1) P. W. Crous et al. Stud. Mycol. 55:235, 2006. (2) V. McDonald et al. Plant Dis. 93:967, 2009. (3) B. Slippers et al. Mycologia 96:83, 2004.
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Kofron, Christopher P., and Francis X. Villablanca. "Decline of the Endangered Morro Bay Kangaroo Rat in California." Journal of Fish and Wildlife Management 7, no. 1 (March 1, 2016): 237–54. http://dx.doi.org/10.3996/102014-jfwm-078.

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AbstractThe Morro Bay kangaroo rat Dipodomys heermanni morroensis occurs in the vicinity of Morro Bay (specifically in and near Los Osos) in western San Luis Obispo County in coastal central California. It was listed as endangered pursuant to the U.S. Endangered Species Conservation Act in 1970 and subsequently the U.S. Endangered Species Act in 1973. Field research from the late 1950s to the mid-1980s has documented a rapid population decline. Despite many efforts, researchers have not captured the Morro Bay kangaroo rat since 1986, and the last captive individual died in 1993. We review the biology and conservation status of the Morro Bay kangaroo rat, including taxonomy and genetics, soil type and burrows, history of decline, primary causes of decline, breeding in the wild and in captivity, habitat restoration, and threats. In particular, there are two primary causes of decline. First, development (urban, agricultural, and industrial) has resulted in direct loss of habitat. Second, in the absence of fire, the early seral stages of coastal dune scrub (optimal habitat) have matured to later successional stages of vegetation, which are denser and with substantially fewer annual food plants, and which negatively impact the locomotion of kangaroo rats and change the diversity of the small mammal community with a likely increase in competition. In 2016 only pockets of habitat remain, with optimal habitat comprising an estimated 1% of the historical geographic range. Although researchers have not demonstrated predation by domestic cats, it is likely a major threat and we suspect it has contributed to the decline based upon a review of the literature. In 2011 we observed potential signs of the Morro Bay kangaroo rat at two historical areas, which suggests it may be persisting at extremely low densities in a few isolated colonies. In addition, we could not obtain permission to survey on four private properties with potential habitat. In consideration of the vast loss and fragmentation of its habitat, along with the continuing and pervasive threats, the Morro Bay kangaroo rat is clearly conservation-reliant. We believe that without urgent human intervention, the Morro Bay kangaroo rat will soon become extinct if it is not already.
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26

Serdani, M., S. Rooney-Latham, K. M. Wallis, and C. L. Blomquist. "First Report of Colletotrichum phormii Causing Anthracnose on New Zealand Flax in the United States." Plant Disease 97, no. 8 (August 2013): 1115. http://dx.doi.org/10.1094/pdis-12-12-1155-pdn.

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Phormium colensoi Hook.f. (syn. P. cookianum), New Zealand flax, (family Xanthorrhoeaceae) is popular in ornamental landscapes in the United States because of its sturdy blade-like foliage available in diverse colors. In February 2012, the Oregon State University Plant Clinic received three potted plants of P. colensoi ‘Black Adder’ from a commercial nursery in Santa Cruz County, California. The margins and midribs of several leaves had brown lesions that were variable in size, and fusiform to ellipsoidal in shape. Embedded in the lesions were black acervuli without setae that exuded salmon-colored spore masses under moist conditions. Conidia were hyaline, cylindrical to fusiform, straight to slightly curved, and 22.4 to 35.2 × 4.0 to 6.4 (average 24.7 × 4.9) μm. Based on morphology, the fungus was confirmed by USDA-APHIS National Identification Services to be Colletotrichum phormii (Henn.) D.F. Farr & Rossman (2). In March 2012, the California Department of Food and Agriculture Plant Pest Diagnostic Lab received additional samples from the same nursery lot (25% disease incidence) from which a similar fungus was recovered. rDNA sequences of the internal transcribed spacer (ITS) region from the California isolate (GenBank KC122681), amplified using primers ITS1 and ITS4 (2), were 100% identical to multiple species of Colletotrichum, including C. phormii by a BLAST query (JQ948446 through JQ948453). ITS sequence similarity alone is not sufficient to address Colletotrichum taxonomy and must be used in combination with host range and morphology (1). Pathogenicity of C. phormii (isolate CDFA986) was tested on three ‘Black Adder’ plants, which were inoculated with 6-mm agar plugs from a 14-day-old culture grown on half strength potato dextrose agar (PDA). Leaves were wound-inoculated along the midrib using colonized plugs (4). Five leaves per plant were inoculated with C. phormii plugs and five leaves per plant were treated with uncolonized PDA agar plugs as controls. Plants were sprayed with water and incubated in plastic bags at 22°C with a 12-h photoperiod. After 48 h, the bags and caps were removed and plants were kept under the same conditions. Two weeks later, water-soaked lesions had developed on the inoculated leaves. Lesions expanded along the midrib and became fusiform in shape after 21 to 28 days. C. phormii was isolated from lesion margins of all the inoculated leaves, but not from control leaves. This experiment was repeated once with similar results. Another Colletotrichum species, C. gloeosporiodes, also occurs on Phormium spp., but differs from C. phormii in morphology and symptom expression. Subsequent nursery and landscape surveys showed that anthracnose caused by C. phormii occurs on several P. colensoi cultivars as well as on P. tenax in five California counties including Santa Cruz, Yolo, Sacramento, San Luis Obispo, and Solano. C. phormii is also reported to infect P. colensoi and P. tenax in New Zealand, Europe, the United Kingdom, Australia, and South Africa (2,3). To our knowledge, this is the first report of C. phormii causing anthracnose on Phormium in North America. This disease could impact the American nursery trade and New Zealand flax production due to crop loss and increased production costs for pest management. References: (1) J. Crouch et al. Mycologia 101:648, 2009. (2) D. F. Farr et al. Mycol. Res. 110:1395, 2006. (3). H. Golzar and C. Wang. Australas. Plant Pathol. 5:110, 2010. (4) L. E. Yakabe et al. Plant Dis. 93:883, 2009.
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27

Siong, Schani. "Illustrated Design Model for Strategic Growth in San Luis Obispo County." Focus 9, no. 1 (October 1, 2012). http://dx.doi.org/10.15368/focus.2012v9n1.12.

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28

Carter, Benjamin E. "A PRELIMINARY CHECKLIST OF THE BRYOPHYTES OF SAN LUIS OBISPO COUNTY, CALIFORNIA." Madroño 68, no. 3 (November 8, 2021). http://dx.doi.org/10.3120/0024-9637-68.3.141.

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29

Griffith, Don. "Results from a Winter Cloud Seeding Feasibility Study Conducted for the Lopez Lake and Salinas Reservoir Drainage Basins in Southern San Luis Obispo County, California." Journal of Weather Modification 51, no. 1 (January 8, 2019). http://dx.doi.org/10.54782/jwm.v51i1.611.

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ABSTRACTThe San Luis Obispo County Flood Control and Water Conservation District (District) to conduct a feasibility/design study for a winter cloud seeding program to target the Lopez Lake and Salinas Reservoir (LLSR) drainage basins located in southern San Luis Obispo County, California contracted north American Weather Consultants (NAWC) in 2016. Recommendations from the American Society of Civil Engineers (ASCE 2016) publication entitled “Guidelines for Cloud Seeding to Augment Precipitation” were followed in determining that the proposed project was both technically and economically feasible. NAWC reviewed available information, compiled and analyzed data, and then developed a proposed program design. Regression relationships were established between November through April precipitation and annual runoff into the two target reservoirs. Estimated increases in precipitation of 9% or 17%, from an analysis of the long-term effects of an operational cloud seeding program conducted by the Santa Barbara County Water Agency in an adjacent drainage were inserted into the regression equations to estimate average increases in inflow to the two target drainages. The District provided NAWC with estimates of the value of this augmented runoff. The costs of conducting a seasonal cloud seeding program were estimated. These steps provided data that could be used to estimate benefit to cost ratios. NAWC concluded that the proposed program was both technically and economically feasible based upon ASCE 2016 criteria.
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30

DOWNEY, DONALD, Chevron Overseas Pe. "Petrography and Provenance of the Miocene-Pliocene Pismo Formation, San Luis Obispo County, California." AAPG Bulletin 84 (2000). http://dx.doi.org/10.1306/a9673590-1738-11d7-8645000102c1865d.

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31

Marilyn E. Tennyson, M. A. Keller,. "Early Miocene Sedimentation and Tectonics in Western San Luis Obispo County, Central California: ABSTRACT." AAPG Bulletin 74 (1990). http://dx.doi.org/10.1306/44b4bdd8-170a-11d7-8645000102c1865d.

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COOPER, JON W., Kennedy/Jenks/Chilt. "A Geophysical Study of the Hydrogeology of the Carrizo Plain Area, San Luis Obispo County, California." AAPG Bulletin 75 (1991). http://dx.doi.org/10.1306/20b23647-170d-11d7-8645000102c1865d.

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33

Henry Walrond, John E. Clare. "Taylor Canyon Field and Government Pool of Morales Canyon Oil Field, San Luis Obispo County, California: ABSTRACT." AAPG Bulletin 72 (1988). http://dx.doi.org/10.1306/703c8e7f-1707-11d7-8645000102c1865d.

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34

Ayoughi, Farnoosh, Maria Handley, Jeff Garza, Samir Amin, Richard Volpe, and Amy Lammert. "Parental perspective and feeding practices effects on food neophobia in elementary school children in San Luis Obispo County." Journal of Sensory Studies 37, no. 1 (September 29, 2021). http://dx.doi.org/10.1111/joss.12717.

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35

Kofron, Christopher P., Connie Rutherford, David L. Magney, Mark Borchert, and Lloyd G. Simpson. "Camatta Canyon amole Hooveria purpurea var. reducta (Agavaceae): a Threatened Plant in La Panza Range, San Luis Obispo County, California." Bulletin, Southern California Academy of Sciences 120, no. 1 (June 22, 2021). http://dx.doi.org/10.3160/0038-3872-120.1.26.

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36

Michael W. Oldershaw. "Depositional Environments of Painted Rock Sandstone Member of Miocene Vaqueros Formation in Eastern Caliente Range, San Luis Obispo County, California: ABSTRACT." AAPG Bulletin 72 (1988). http://dx.doi.org/10.1306/703c8df3-1707-11d7-8645000102c1865d.

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McLEAN, HUGH, U.S. Geological Surve. "Miocene Lavas Constrain Right Slip Movement on the West Huasna Fault in San Luis Obispo County to Less Than 8 Km." AAPG Bulletin 77 (1993). http://dx.doi.org/10.1306/bdff71d8-1718-11d7-8645000102c1865d.

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Clem, C. Scott, Brittany D. Wingert, Andrea R. Kautz, Amanda L. Roe, Teagan Mulford, David Bettman, Robert T. Conrow, et al. "Checklist of true flies (Diptera) from San Luis Obispo County, California, U.S.A.: an outcome of the Fly School II taxonomic workshop." Pan-Pacific Entomologist 98, no. 4 (December 20, 2022). http://dx.doi.org/10.3956/2022-98.4.270.

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39

Javid, David, Kris Krasnove, Vicente del Rio, and Daniel Levi. "Sense of Community and Travel Behavior: Investigating New Urbanism and Smart Growth Principles in Two Residential Neighborhoods in San Luis Obispo County." Focus 2, no. 1 (April 1, 2005). http://dx.doi.org/10.15368/focus.2005v2n1.7.

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40

Deborah C. Goaldman. "Depositional Environments of Quail Canyon Sandstone and Soda Lake Shale Members of Miocene Vaqueros Formation in Southeastern Caliente Range, San Luis Obispo County, California: ABSTRACT." AAPG Bulletin 72 (1988). http://dx.doi.org/10.1306/703c8d03-1707-11d7-8645000102c1865d.

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