Relevant bibliographies by topics / Control plant pathogens

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Control plant pathogens'

Author: Grafiati
Published: 4 June 2021
Last updated: 14 February 2022

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Journal articles on the topic "Control plant pathogens"

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Sutthisa, W. "Biological Control Properties of Cyathus spp. to Control Plant Disease Pathogens." Journal of Pure and Applied Microbiology 12, no. 4 (December 30, 2018): 1755–60. http://dx.doi.org/10.22207/jpam.12.4.08.

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Dawadi, Sujan, Fulya Baysal-Gurel, Karla M. Addesso, Prabha Liyanapathiranage, and Terri Simmons. "Fire Ant Venom Alkaloids: Possible Control Measure for Soilborne and Foliar Plant Pathogens." Pathogens 10, no. 6 (May 27, 2021): 659. http://dx.doi.org/10.3390/pathogens10060659.

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The purpose of this study was to evaluate fire ant venom alkaloids and an alarm pheromone analog against several plant pathogens, including Botrytis cinerea, Fusarium oxysporum, Phytophthora nicotianae, P. cryptogea, Pseudomonas syringae, Phytopythium citrinum, Rhizoctonia solani, Sclerotonia rolfsii, Xanthomonas axonopodis, and X. campestris. All pathogens were tested against red imported fire ant venom alkaloid extract and alarm pheromone compound for growth inhibition in in vitro assay. The venom alkaloid extract inhibited fungal and oomycete pathogens. Neither of the treatments were effective against bacterial pathogens. Three soilborne pathogens, P. nicotianae, R. solani, F. oxysporum, and one foliar pathogen, B. cinerea were selected for further in-vivo assays on impatiens (Impatiens walleriana ‘Super Elfin XP violet’). Total plant and root weight were higher in venom alkaloid treated plants compared to an inoculated control. The venom alkaloid treatment reduced damping-off, root rot severity, and pathogen recovery in soilborne pathogen inoculated plants. Similarly, venom alkaloid reduced Botrytis blight. However, higher venom rates caused foliar phytotoxicity on plants. Therefore, additional work is needed to evaluate rates of venom alkaloids or formulations to eliminate negative impacts on plants. Overall, these results suggest that red imported fire ant venom alkaloids may provide a basis for new products to control soilborne and foliar plant pathogens.
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Marois, James J. "Biological Control of Plant Pathogens." Ecology 71, no. 4 (August 1990): 1632. http://dx.doi.org/10.2307/1938303.

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Yandoc-Ables, C. B., E. N. Rosskopf, and R. Charudattan. "Plant Pathogens at Work: Improving Weed Control Efficacy." Plant Health Progress 8, no. 1 (January 2007): 33. http://dx.doi.org/10.1094/php-2007-0822-02-rv.

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Research in the area of the use of plant pathogens as biological control agents for weeds is conducted using either the classical or the bioherbicidal approach. In the classical approach, a pathogen is typically imported from a foreign location to control an introduced weed target. In the inundative or bioherbicide strategy, an indigenous pathogen is cultured to produce large quantities of inoculum that are applied at high rates to the entire target weed population. Research on the development of plant pathogens for biological control using the inundative or bioherbicide approach has moved from determining host range and demonstrating pathogenicity to investigating systems that enhance the efficacy of these agents. Accepted for publication 9 April 2007. Published 22 August 2007.
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Lumsden, Robert D., and George C. Papavizas. "Biological control of soilborne plant pathogens." American Journal of Alternative Agriculture 3, no. 2-3 (1988): 98–101. http://dx.doi.org/10.1017/s0889189300002253.

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AbstractSoilborne plant pathogens cause major economic losses in agricultural crops, and the present methods for control of diseases brought about by these pathogens are inadequate. Alternatives are also needed to substitute for the use of chemical fungicides. Many of these are known to induce tumors in experimental animals and are thus regarded by some investigators as potential human carcinogens when present as residues in food and water. In addition, such alternative control measures are needed because of the potential threat of development of resistance to fungicides, especially systemic fungicides, by fungal plant pathogens, and because of nontarget side effects on other plant pathogens and on beneficial microorganisms. Alternative disease control is sometimes possible through development of crop plants resistant to disease. Unfortunately, however, resistance is lacking or not available for many diseases caused by soilborne plant pathogens. Another biological means of controlling disease which is presently gaining much attention is biological control. Several systems of biological control are presently being explored and may be developed in a few years into reliable alternatives to conventional chemical control methods. The use of the mycoparasite Sporidesmium sclerotivorum, for example, against several diseases caused by Sclerotinia species is promising. Talaromyces flavus may in the future be exploited for use against several wilt diseases caused by Verticillium dahliae. Finally, practical control of several diseases caused by Pythium spp., Rhizoctonia solani, and Sclerotium rolfsii may eventually become possible through the use of Trichoderma spp. and Gliocladium virens. Development of these biological control systems will require much additional research directed toward a better understanding of the basic biology and mechanisms of action of beneficial fungi against plant pathogens. In addition, extensive cooperation will be required among research scientists, governmental agencies responsible for regulating the use of pestcontrol systems, and most importantly, private industry to develop biological control agents for the market and to coordinate acceptance and use by producers and acceptance by consumers.
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Sánchez-Vallet, Andrea, Simone Fouché, Isabelle Fudal, Fanny E. Hartmann, Jessica L. Soyer, Aurélien Tellier, and Daniel Croll. "The Genome Biology of Effector Gene Evolution in Filamentous Plant Pathogens." Annual Review of Phytopathology 56, no. 1 (August 25, 2018): 21–40. http://dx.doi.org/10.1146/annurev-phyto-080516-035303.

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Filamentous pathogens, including fungi and oomycetes, pose major threats to global food security. Crop pathogens cause damage by secreting effectors that manipulate the host to the pathogen's advantage. Genes encoding such effectors are among the most rapidly evolving genes in pathogen genomes. Here, we review how the major characteristics of the emergence, function, and regulation of effector genes are tightly linked to the genomic compartments where these genes are located in pathogen genomes. The presence of repetitive elements in these compartments is associated with elevated rates of point mutations and sequence rearrangements with a major impact on effector diversification. The expression of many effectors converges on an epigenetic control mediated by the presence of repetitive elements. Population genomics analyses showed that rapidly evolving pathogens show high rates of turnover at effector loci and display a mosaic in effector presence-absence polymorphism among strains. We conclude that effective pathogen containment strategies require a thorough understanding of the effector genome biology and the pathogen's potential for rapid adaptation.
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Fletcher, J. D., F. A. Shah, R. C. Butler, S. L. H. Viljanen-Rollinson, and M. V. Marroni. "Control of plant pathogens practical experiments in eradication." New Zealand Plant Protection 62 (August 1, 2009): 409. http://dx.doi.org/10.30843/nzpp.2009.62.4858.

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There have been relatively few attempts to eradicate plant pathogens once they have established themselves in New Zealand However when concerted attempts are made very often there have been some notable successes (eg citrus canker and common smut of maize) For a successful eradication of a plant pathogen simple practical tools are needed This research describes a series of experimental applications demonstrating the potential to eradicate seedborne fungal and bacterial pathogens and nematode incursions In simulated incursions seedborne pathogens of celery were eradicated from experimental plots using solarisation and spray chemicals singly or in combination In a simulated cyst nematode incursion Globodera rostochiensis was successfully controlled using heat treatment rather than chemical pesticides Variations on these methods could be tailored to contain and eradicate biosecurity incursions
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Kuo, Yen-Wen, and Bryce W. Falk. "RNA interference approaches for plant disease control." BioTechniques 69, no. 6 (December 2020): 469–77. http://dx.doi.org/10.2144/btn-2020-0098.

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Plant diseases caused by a variety of pathogens can have severe effects on crop plants and even plants in natural ecosystems. Despite many effective conventional approaches to control plant diseases, new, efficacious, environmentally sound and cost-effective approaches are needed, particularly with our increasing human population and the effects on crop production and plant health caused by climate change. RNA interference (RNAi) is a gene regulation and antiviral response mechanism in eukaryotes; transgenic and non transgenic plant-based RNAi approaches have shown great effectiveness and potential to target specific plant pathogens and help control plant diseases, especially when no alternatives are available. Here we discuss ways in which RNAi has been used against different plant pathogens, and some new potential applications for plant disease control.
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de Nooij, M. P., W. H. van der Putten, and R. Campbell. "Biological Control of Microbial Plant Pathogens." Journal of Applied Ecology 27, no. 3 (December 1990): 1090. http://dx.doi.org/10.2307/2404399.

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Thomashow, Linda S. "Biological control of plant root pathogens." Current Opinion in Biotechnology 7, no. 3 (June 1996): 343–47. http://dx.doi.org/10.1016/s0958-1669(96)80042-5.

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Dissertations / Theses on the topic "Control plant pathogens"

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Holliday, Gillian. "Biological control of seed-borne bacterial plant pathogens." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309601.

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Helps, Joseph Christopher. "Cultivar mixtures and the control of plant pathogens." Thesis, University of Cambridge, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708199.

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McGinley, Susan. "Exploding Zoospores: Using Biosurfactants to Control Plant Pathogens." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/622309.

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Al-Gharabally, Dunia Hashim. "Biological control of soilborne plant pathogens by greenwaste compost." Thesis, University of Exeter, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393320.

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Krupska, Iuliia. "Fungal pathogens for biological control of crabgrass «Digitaria spp.» in Canada." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110609.

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Crabgrass is a major problem in turf in Canada and infestations can be as high as 30% of a residential lawn. Due to the bans and restrictions on the use of chemical herbicides in several provinces, cities and municipalities across Canada, there are currently no effective solutions for controlling crabgrass. Two species of crabgrass, large (Digitaria sanguinalis) and smooth (Digitaria ischaemum), are commonly found in cropland and turf. Several species of phytopathogenic fungi have been studied in China and USA as possible biocontrol agents of Digitaria spp. From among those tested the most promising for the use in Canada are species in the genus Curvularia (C. intermediate, C. lunata, C. eragrostidis). In the present study, twenty-three fungal cultures associated with Digitaria spp. were isolated from leaves with visual symptoms of diseases. They were identified to a genera or species level. Growth and spore production were evaluated for each isolate and slowly growing and poorly sporulating isolates were eliminated from further experiments. Twenty remaining isolates were tested for pathogenicity on large and smooth crabgrass. Isolates belonging to C. eragrostidis species were the most effective. These isolates did not appreciably harm the majority of turf grasses and cereal crops, but caused major damage on forage grass timothy. Due to the absence of difference in the host range and superiority in spore production, isolate Dip0307 (C. eragrostidis) was chosen for further evaluation. Optimal temperature and dew duration conditions and minimal requirements for successful weed control with isolate Dip0307 were determined and compared with those for QZ-2000, the Chinese strain of C. eragrostidis. It was concluded that C. eragrostidis isolate Dip0307 is a strong candidate for development as a bioherbicide against large and smooth crabgrass in Canada.
La digitaire est un problème majeur dans le gazon au Canada et les infestations peuvent être aussi élevées que 30% dans les pelouses résidentielles. En raison de l'interdiction et des restrictions sur l'utilisation des herbicides chimiques dans plusieurs provinces, villes et municipalités du Canada, il n'existe pas actuellement de solution efficace pour contrôler la digitaire. Deux espèces de digitaire sont couramment trouvées dans les terres cultivées et le gazon soit la digitaire sanguine (Digitaria sanguinalis) et la digitaire astringente (Digitaria ischaemum). Plusieurs espèces de champignons phytopathogènes ont été étudiés en Chine et aux États-Unis comme agents de lutte biologique possibles de Digitaria spp. Parmi les espèces testées, l'espèce la plus prometteuse pour l'utilisation au Canada se trouve dans le genre Curvularia (C. intermédiaire, C. lunata, C. eragrostidis). Dans la présente étude, 23 cultures fongiques associées à Digitaria spp. ont été isolées à partir de feuilles présentant des symptômes visuels de maladies. Elles ont été identifiées à un niveau de genre ou d'espèce. La croissance et la production de spores ont été évaluées pour chaque isolat et les isolats qui démontraient une faible croissance et sporulation ont été éliminés des expériences subséquentes. Les 20 isolats restants ont été testés pour leur pathogénie sur la digitaire sanguine et astringente. Les isolats appartenant à l'espèce C. eragrostidis ont été les plus efficaces. Dans un même temps, ils ne nuisaient pas de façon significative à la majorité des graminées à gazon et des cultures céréalières, mais ont causé des dégâts significatifs sur les graminées fourragères testées. En raison de l'absence de différence dans sa gamme d'hôtes et de sa supériorité pour la production de spores, l'isolat Dip0307 (C. eragrostidis) a été choisi pour une recherche plus approfondie. Il a été soumis à différentes températures et durées d'exposition à la rosée et il a été comparé avec la souche chinoise QZ-2000 de C. eragrostidis. Cette étude nous a permis de conclure que l'isolat Dip0307 de C. eragrostidis est un bon candidat pour le développement d'un bioherbicide contre la digitaire sanguine et astringente au Canada.
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Kotze, Charl. "Biological control of the grapevine trunk disease pathogens : pruning wound protection." Thesis, Stellenbosch : Stellenbosch University, 2008. http://hdl.handle.net/10019.1/2117.

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Thesis (MScAgric (Plant Pathology))--Stellenbosch University, 2008.
In recent years, several studies have conclusively shown that numerous pathogens, including several species in the Botryosphaeriaceae, Phomopsis, Phaeoacremonium, as well as Phaeomoniella chlamydospora and Eutypa lata, contribute to premature decline and dieback of grapevines. These pathogens have the ability to infect grapevines through pruning wounds, which leads to a wide range of symptoms developing that includes stunted growth, cankers and several types of wood necrosis. Pruning wounds stay susceptible for 2 to 16 weeks after pruning and sustained levels of pruning wound protection is therefore required. The aims of this study were to (i) evaluate the ability of several biological agents to protect pruning wounds, (ii) characterise unknown Trichoderma strains and identify their modes of action and (iii) determine the optimal time of season for biological agent application. Several biological agents were initially evaluated in a laboratory for their antagonism against trunk disease pathogens. The best performing control agents were tested in a field trial conducted on Merlot and Chenin blanc vines in the Stellenbosch region. Spurs were pruned to three buds and the fresh pruning wounds were treated with benomyl as a control treatment, Trichoderma-based commercial products, Vinevax® and Eco77®, Bacillus subtilis, and Trichoderma isolates, USPP-T1 and -T2. Seven days after treatment the pruning wounds were spray inoculated with spore suspensions of four Botryosphaeriaceae spp. (Neofusicoccum australe, N. parvum, Diplodia seriata and Lasiodiplodia theobromae), Eutypa lata, Phaeomoniella chlamydospora and Phomopsis viticola. After a period of 8 months the treatments were evaluated by isolations onto potato dextrose agar. Trichodermabased products and isolates in most cases showed equal or better efficacy than benomyl, especially USPP-T1 and -T2. Moreover, these isolates demonstrated a very good ability to colonise the wound tissue. The two uncharacterised Trichoderma isolates (USPP-T1 and USPP-T2), which were shown to be highly antagonistic toward the grapevine trunk disease pathogens, were identified by means of DNA comparison, and their ability to inhibit the mycelium growth of the trunk disease pathogens by means of volatile and non-volatile metabolite production studied. The two gene areas that were used include the internal transcribed spacers (ITS 1 and 2) and the 5.8S ribosomal RNA gene and the translation elongation factor 1 (EF). The ITS and EF sequences were aligned to published Trichoderma sequences and the percentage similarity determined and the two Trichoderma isolates were identified as Trichoderma atroviride. The volatile production of T. atroviride isolates was determined by placing an inverted Petri dish with Trichoderma on top of a dish with a pathogen isolate and then sealed with parafilm. Trichoderma isolates were grown for 2 days on PDA where after they were inverted over PDA plates containing mycelial plugs. The inhibition ranged from 23.6% for L. theobromae to 72.4% for P. viticola. Inhibition by non-volatile products was less than for the volatile inhibition. Inhibition ranged from 7.5% for N. parvum to 20.6% for L. theobromae. In the non-volatile inhibition USPP-T1 caused significantly more mycelial inhibition than USPP-T2. The timing of pruning wound treatment and subsequent penetration and colonisation of the wound site was also determined. One-year-old canes of the Shiraz and Chenin blanc cultivars were grown in a hydroponic system, pruned and spray treated with a spore suspension of Trichoderma atroviride (USPP-T1) as well as a fluorescent pigment. On intervals 1, 3, 5 and 7 days after treatment, the distal nodes were removed and dissected longitudinally. From the one half, isolations were made at various distances from the pruning surface, while the other half was observed under ultra-violet light to determine the depth of fluorescent pigment penetration. Shortly after spray-inoculation of a fresh pruning wound, Trichoderma was isolated only from the wound surface and shallow depths into the wound (2 to 5 mm). One week after inoculation, Trichoderma was isolated at 10 mm depths, and after 2 weeks, at 15 mm depths. Fluorescent pigment particles were observed to a mean depth of 6 mm, which suggests that initial isolation of Trichoderma at these depths was resultant of the physical deposition of conidia deeper into the pruning wound tissue, whereas the isolation of Trichoderma from deeper depths might be attributed to colonisation of grapevine tissue. In a vineyard trial, fluorescent pigment was spray-applied to pruning wounds of Shiraz and Chenin blanc grapevines during July and September at intervals 0, 1, 3, 7 and 14 days after pruning. One week after treatment, the distal nodes were removed and dissected longitudinally. Each half was observed under UV light and the pigment penetration measured. For Chenin blanc and Shiraz, July pruning wounds showed significant deeper penetration of the pigment than pruning wounds treated in September. Moreover, pruning wounds made in September showed pigment particles in longitudinal sections up to 1 day after pruning, whereas wounds made in July showed pigment particles up to 3 days in the xylem vessels. These findings suggest that the best time for application of a biological control agent should be within the first 24 hours after pruning.
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Cunniffe, Nicholas James. "Modelling dispersal of soil-borne plant pathogens and efficacy of biological control." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612498.

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Bester, Wilma. "Characterisation and management of trunk disease-causing pathogens on table grapevines." Thesis, Stellenbosch : Stellenbosch University, 2006. http://hdl.handle.net/10019.1/21550.

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Thesis (MScAgric)--University of Stellenbosch, 2006.
ENGLISH ABSTRACT: Phaeomoniella chlamydospora, Eutypa lata, Phomopsis, Phaeoacremonium, and Botryosphaeria spp. are important trunk disease pathogens that cause premature decline and dieback of grapevine. Previous research has focused primarily on wine grapes and the incidence and symptomatology of these pathogens on table grapes were largely unknown. A survey was therefore conducted to determine the status and distribution of these pathogens and associated symptoms in climatically diverse table grape growing regions. Fifteen farms were identified in the winter rainfall (De Doorns, Paarl and Trawal) and summer rainfall (Upington and Groblersdal) areas. Samples were taken in July and August 2004 from Dan-ben-Hannah vineyards that were 8 years and older. Distal ends of arms were removed from 20 randomly selected plants in each vineyard. These sections were dissected and isolations were made from each of the various symptom types observed: brown or black vascular streaking, brown internal necrosis, wedge-shaped necrosis, watery necrosis, esca-like brown and yellow soft wood rot, as well as asymptomatic wood. Fungal isolates were identified using molecular and morphological techniques. Pa. chlamydospora was most frequently isolated (46.0%), followed by Phaeoacremonium aleophilum (10.0%), Phomopsis viticola (3.0%), Botryosphaeria obtusa (3.0%), B. rhodina (2.2%), B. parva (2.0%), Fusicoccum vitifusiforme (0.6%), B. australis, B. dothidea and an undescribed Diplodia sp. (0.2% each), while E. lata was not found. Most of these pathogens were isolated from a variety of symptom types, indicating that disease diagnosis can not be based on symptomatology alone. Pa. chlamydospora was isolated from all areas sampled, although most frequently from the winter rainfall region. Pm. aleophilum was found predominantly in Paarl, while P. viticola only occurred in this area. Although B. obtusa was not isolated from samples taken in De Doorns and Groblersdal, it was the most commonly isolated Botryosphaeria sp., being isolated from Upington, Paarl and Trawal. B. rhodina occurred only in Groblersdal and B. parva in Paarl, Trawal and Groblersdal, while B. australis was isolated from Paarl only. The rest of the isolates (33%) consisted of sterile cultures, Exochalara, Cephalosporium, Wangiella, Scytalidium, Penicillium spp. and two unidentified basidiomycetes, which were isolated from five samples with yellow esca-like symptoms from the Paarl area. These findings clearly illustrate that grapevine trunk diseases are caused by a complex of fungal pathogens, which has serious implications for disease diagnosis and management. Protection of wounds against infection by any of these trunk disease pathogens is the most efficient and cost-effective means to prevent grapevine trunk diseases. However, previous research on the effectiveness of chemical pruning wound protectants has mostly focused on the control of Eutypa dieback only. Fungicide sensitivity studies have been conducted for Pa. chlamydospora, P. viticola and Eutypa lata, but no such studies have been conducted for the pathogenic Botryosphaeria species from grapevine in South Africa. Ten fungicides were therefore tested in vitro for their efficacy on mycelial inhibition of the four most common and/or pathogenic Botryosphaeria species in South Africa, B. australis, B. obtusa, B. parva and B. rhodina. Iprodione, pyrimethanil, copper ammonium acetate, kresoxim-methyl and boscalid were ineffective in inhibiting the mycelial growth at the highest concentration tested (5 μg/ml; 20 μg/ml for copper ammonium acetate). Benomyl, tebuconazole, prochloraz manganese chloride and flusilazole were the most effective fungicides with EC50 values for the different species ranging from 0.36-0.55, 0.07-0.17, 0.07-1.15 and 0.04-0.36 μg/ml, respectively. These fungicides, except prochloraz manganese chloride, are registered on grapes in South Africa and were also reported to be effective against Pa. chlamydospora, P. viticola and E. lata. Results from bioassays on 1-year-old Chenin Blanc grapevine shoots indicated that benomyl, tebuconazole and prochloraz manganese chloride were most effective in limiting lesion length in pruning wounds that were inoculated with the Botryosphaeria spp after fungicide treatment. The bioassay findings were, however, inconclusive due to low and varied re-isolation data of the inoculated lesions. Benomyl, tebuconazole, prochloraz manganese chloride and flusilazole can nonetheless be identified as fungicides to be evaluated as pruning wound protectants in additional bioassays and vineyard trials against Botryosphaeria spp. as well as the other grapevine trunk disease pathogens.
AFRIKAANSE OPSOMMING: Phaeomoniella chlamydospora, Eutypa lata, Phomopsis, Phaeoacremonium, en Botryosphaeria spesies is die mees belangrikste stamsiekte patogene wat agteruitgang en vroeë terugsterwing van wingerd veroorsaak. Voorafgaande navorsing het hoofsaaklik gefokus op wyndruiwe en die voorkoms en simptomatologie van hierdie patogene op tafeldruiwe is dus grootliks onbekend. ‘n Opname is gevolglik gedoen in verskillende klimaaatsareas waar tafeldruiwe verbou word om die voorkoms en verspreiding, asook die simptome geassosieer met hierdie patogene, te bepaal. Vyftien plase is geïdentifiseer in die winter- (De Doorns, Paarl en Trawal) en somer-reënval (Upington en Groblersdal) streke. Wingerde (8 jaar en ouer) met die kultivar Dan-ben-Hannah is gekies vir opname en monsters is gedurende Julie en Augustus 2004 geneem. Die distale deel van ‘n arm is verwyder vanaf 20 lukraak gekose plante in elke wingerd. Hierdie dele is ontleed en isolasies is gemaak vanuit elke simptoomtipe wat beskryf is, naamlik bruin en swart vaskulêre verkleuring, bruin interne nekrose, wig-vormige nekrose, waterige nekrose, esca-geassosieerde bruin en geel sagte houtverrotting en asimptomatiese hout. Identifikasie van die swamagtige isolate is gedoen op grond van morfologiese eienskappe en molekulêre tegnieke. Pa. chlamydospora is die meeste geïsoleer (46.0%), gevolg deur Phaeoacremonium aleophilum (10.0%), Phomopsis viticola (3.0%), Botryosphaeria obtusa (3.0%), B. rhodina (2.2%), B. parva (2.0%), Fusicoccum vitifusiforme (0.6%), B. australis, B. dothidea en ‘n onbeskryfde Diplodia sp. (0.2% elk), terwyl E. lata nie geïsoleer is nie. Hierdie patogene is elk geïsoleer vanuit ‘n verskeidenheid simptoomtipes, wat daarop dui dat siektediagnose nie alleenlik op simptomatologie gebaseer kan word nie. Pa. chlamydospora is geïsoleer vanuit al die gebiede, alhoewel die patogeen opmerklik meer voorgekom het in die winter-reënval area. Pm. aleophilum het hoofsaaklik voorgekom in Paarl, terwyl P. viticola slegs in hierdie area voorgekom het. Alhoewel B. obtusa nie voorgekom het in die De Doorns en Groblersdal areas nie, was dit die mees algemeen geïsoleerde Botryosphaeria sp. en het in Upington, Paarl en Trawal voorgekom. B. rhodina het slegs in Groblersdal voorgekom, B. parva in Paarl, Groblersdal en Trawal en B. australis het slegs in Paarl voorgekom. Die res van die isolate (33%) het bestaan uit steriele kulture, Exochalara, Cephalosporium, Wangiella, Scytalidium, en Penicillium spesies asook twee onbekende basidiomycete isolate, geïsoleer vanuit vyf monsters met geel eska-geassosieerde simptome vanuit die Paarl area. Hierdie resultate illustreer dus die feit dat wingerdstamsiektes deur ‘n kompleks van swampatogene veroorsaak word, wat belangrike implikasies het vir die bestuur en diagnose van hierdie siektes. Wondbeskerming teen infeksie van enige van hierdie stamsiekte patogene is die mees doeltreffende en koste-effektiewe manier om wingerdstamsiektes te voorkom. Vorige navorsing aangaande die effektiwiteit van chemiese wondbeskermingsmiddels het egter slegs gefokus op die beheer van Eutypa terugsterwing. In vitro swamdoder sensitiwiteitstoetse is gedoen vir Pa. chlamydospora, P. viticola en Eutypa lata, maar geen studies is al gedoen ten opsigte van die patogeniese Botryosphaeria spesies op wingerd in Suid-Afrika nie. Tien swamdoders is dus getoets vir inhibisie van in vitro miseliumgroei van die vier mees algemene en/of patogeniese Botryosphaeria spesies wat in Suid-Afrika voorkom, naamlik B. australis, B. obtusa, B. parva en B. rhodina. Iprodione, pyrimethanil, koper ammonium asetaat, kresoxim-metiel en boscalid was oneffektief by die hoogste konsentrasies getoets (5 μg/ml; 20 μg/ml vir koper ammonium asetaat). Benomyl, tebuconasool, prochloraz mangaan chloried en flusilasool was die mees effektiewe swamdoders met EC50 waardes tussen 0.36-0.55, 0.07-0.17, 0.07-1.15 en 0.04-0.36 μg/ml, onderskeidelik vir die verskillende spesies. Hierdie fungisiedes, behalwe prochloraz mangaan chloried, is geregistreer op druiwe in Suid-Afrika en is ook effektief gevind teenoor Pa. chlamydospora, P. viticola en E. lata. Resultate van biotoetse op 1-jaar-oue Chenin Blanc wingerd lote het getoon dat benomyl, tebuconasool en prochloraz mangaan chloried die effektiefste was om die lengte van letsels in snoeiwonde, geinokuleer met Botryosphaeria spesies na die aanwending van swamdoder behandelings, te verminder. Die bevindinge was egter onbeslis as gevolg van die lae en variërende her-isolerings data. Benomyl, tebuconasool, prochloraz mangaan chloried en flusilasool kan egter geïdentifiseer word as swamdoders wat verder geevalueer kan word as snoeiwond beskermingsmiddels teen Botryosphaeria spesies asook ander wingerd stamsiekte patogene in verdere biotoetse en wingerdproewe.
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Murray, Donna. "Interactions of Pseudomonas fluorescens and soil-borne oomycete plant pathogens in a biological control system." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259856.

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Reyna-Granados, Javier Rolando. "Control of Foodborne Pathogenic Bacteria Using Natural Plant Antimicrobials." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/228511.

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Foodborne pathogens are a threat to public health worldwide. Because many consumers prefer natural compounds to synthetic additives, research on safe plant-derived compounds with antimicrobial activity against foodborne pathogens is vital. The aim of this investigation was to evaluate the antimicrobial activities of plant essential oils (oregano, cinnamon, lemongrass), their active components (carvacrol, trans-cinnamaldehyde, citral) and plant-extracts such as green tea, apple skin extract, black and decaffeinated black tea, grapes seed and pomace extracts against foodborne bacteria. Salmonella enterica serotype Typhimurium DT104, and serotype Newport, were selected conducting an antibiotic screening on 23 Salmonella isolates using seven antibiotics to determine antibiotic resistance. Listeria monocytogenes (strain 101M; beef and pork sausage isolate; resistant to antimicrobials in past investigations) was included to represent gram-positive bacteria. Escherichia coli O157:H7 virulent isolates (932- apple juice isolate; ATCC 35150- human isolate; F4637- sprouts isolate; used as a cocktail) were selected after conducting a Multiplex PCR over nine E. coli O157:H7 isolates to detect shiga-toxin 1 and 2 genes. All antimicrobials were evaluated in vitro in phosphate buffered saline. In general, all pathogens were more susceptible to essential oils and their active components, than powder extracts. The most active antimicrobials from each category were directly applied on foods. The activity of oregano oil (0.5%) and green tea (3%) was evaluated against S. Typhimurium on chicken and S. Newport on tomatoes and sprouts, and the results showed that oregano oil was more effective. In addition, baby spinach leaf samples inoculated with green fluorescent protein labeled S. Newport were examined under confocal scanning laser microscope before and after antimicrobial treatments. Antimicrobial experiments against L. monocytogenes on sprouts, ham and bologna, carvacrol at 0.5% and grape seed extract at 3% were used and carvacrol showed better activity. Antimicrobial activity against E. coli O157:H7 was tested on romaine lettuce, spinach and ground beef using oregano oil at 0.5% and green tea at 3%. Both compounds were effective showing no recovery of E. coli O157:H7 from lettuce and spinach; however, was not reduced in ground beef. Antimicrobial plant compounds have the potential for reducing foodborne pathogenic bacteria on/in various foods.
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Books on the topic "Control plant pathogens"

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H, Dickinson C., ed. Plant pathology and plant pathogens. 3rd ed. Malden, Mass: Blackwell Science, 1998.

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Campbell, R. E. Biological control of microbial plant pathogens. Cambridge: Cambridge University Press, 1989.

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INDERJIT and K. G. MUKERJI, eds. Allelochemicals: Biological Control of Plant Pathogens and Diseases. Dordrecht: Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4447-x.

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Melbourne), International Congress of Plant Pathology (4th 1983 University of. Ecology and management of soilborne plant pathogens. St. Paul, Minn., U.S.A: American Phytopathological Society, 1985.

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editor, Moorman Gary, Wohanka Walter editor, and Büttner Carmen editor, eds. Biology, detection, and management of plant pathogens in irrigation water. St. Paul, Minnesota: APS Press, The American Phytopathological Society, 2014.

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US DEPARTMENT OF AGRICULTURE. Biological control: spreading the benefits. [Washington, D.C.]: U.S. Dept. of Agriculture, 1989.

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European Foundation for Plant Pathology. Conference. Biotic interactionsand soil-borne diseases. Amsterdam: Elsevier, 1991.

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Porter, Read. Strategies for effective state early detection/rapid response programs for plant pests and pathogens. [Washington, D.C.]: Environmental Law Institute, 2007.

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Porter, Read. Strategies for effective state early detection/rapid response programs for plant pests and pathogens. [Washington, D.C.]: Environmental Law Institute, 2007.

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Porter, Read. Strategies for effective state early detection/rapid response programs for plant pests and pathogens. [Washington, D.C.]: Environmental Law Institute, 2007.

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Book chapters on the topic "Control plant pathogens"

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Van Driesche, Roy G., and Thomas S. Bellows. "Biological Control Agents for Plant Pathogens." In Biological Control, 93–101. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1157-7_6.

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Stouvenakers, Gilles, Peter Dapprich, Sebastien Massart, and M. Haïssam Jijakli. "Plant Pathogens and Control Strategies in Aquaponics." In Aquaponics Food Production Systems, 353–78. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_14.

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AbstractAmong the diversity of plant diseases occurring in aquaponics, soil-borne pathogens, such as Fusarium spp., Phytophthora spp. and Pythium spp., are the most problematic due to their preference for humid/aquatic environment conditions. Phytophthora spp. and Pythium spp. which belong to the Oomycetes pseudo-fungi require special attention because of their mobile form of dispersion, the so-called zoospores that can move freely and actively in liquid water. In coupled aquaponics, curative methods are still limited because of the possible toxicity of pesticides and chemical agents for fish and beneficial bacteria (e.g. nitrifying bacteria of the biofilter). Furthermore, the development of biocontrol agents for aquaponic use is still at its beginning. Consequently, ways to control the initial infection and the progression of a disease are mainly based on preventive actions and water physical treatments. However, suppressive action (suppression) could happen in aquaponic environment considering recent papers and the suppressive activity already highlighted in hydroponics. In addition, aquaponic water contains organic matter that could promote establishment and growth of heterotrophic bacteria in the system or even improve plant growth and viability directly. With regards to organic hydroponics (i.e. use of organic fertilisation and organic plant media), these bacteria could act as antagonist agents or as plant defence elicitors to protect plants from diseases. In the future, research on the disease suppressive ability of the aquaponic biotope must be increased, as well as isolation, characterisation and formulation of microbial plant pathogen antagonists. Finally, a good knowledge in the rapid identification of pathogens, combined with control methods and diseases monitoring, as recommended in integrated plant pest management, is the key to an efficient control of plant diseases in aquaponics.
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Reddy, P. Parvatha. "Biological Control of Plant Pathogens." In Sustainable Crop Protection under Protected Cultivation, 61–69. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-952-3_5.

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Van Driesche, Roy G., and Thomas S. Bellows. "Methods for Biological Control of Plant Pathogens." In Biological Control, 235–56. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-1157-7_12.

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Watson, Alan K. "The Classical Approach with Plant Pathogens." In Microbial Control of Weeds, 3–23. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-9680-6_1.

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Charudattan, R. "The Mycoherbicide Approach with Plant Pathogens." In Microbial Control of Weeds, 24–57. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-9680-6_2.

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Elad, Yigal, and Stanley Freeman. "Biological Control of Fungal Plant Pathogens." In Agricultural Applications, 93–109. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-03059-2_6.

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Kuc, Joseph, and Norman E. Strobel. "Induced Resistance Using Pathogens and Nonpathogens." In Biological Control of Plant Diseases, 295–303. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4757-9468-7_40.

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Saxena, Prachi, Jyoti Srivastava, Shrishti Pandey, Shreya Srivastava, Neha Maurya, Niharika Chand Kaushik, Shubham Mishra, et al. "Plants for Biocontrol and Biological Control of Plant Pathogens." In Plant Biotic Interactions, 147–79. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-26657-8_10.

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Kaur, Surinder, and K. G. Mukerji. "Biological Control of Bacterial Plant Diseases." In Biotechnological Approaches in Biocontrol of Plant Pathogens, 157–76. Boston, MA: Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-4745-7_8.

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Conference papers on the topic "Control plant pathogens"

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Barriga Medina, elia. "Exploring fungal pathogens to control invasive raspberry (Rubus niveus) in the Galapagos Islands." In ASPB PLANT BIOLOGY 2020. USA: ASPB, 2020. http://dx.doi.org/10.46678/pb.20.1383218.

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Megan N. Marshall and Jean S. VanderGheynst. "Combining Compost Application and Soil Solarization for Control of Soilborne Plant Pathogens." In 2003, Las Vegas, NV July 27-30, 2003. St. Joseph, MI: American Society of Agricultural and Biological Engineers, 2003. http://dx.doi.org/10.13031/2013.14969.

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Lencautan, M. "Determinarea nivelului de rezistenţă a genotipurilor contra atacul bolilor principale a materialului genetic de ameliorare a culturilor leguminoase pe fonduri naturale şi artificiale de infecţie." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.69.

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In the soil and climatic conditions of the Republic of Moldova, legume crops are attacked by a complex of harmful species, which present a danger in decreasing the level of plant productivity. To solve the problem of increasing the level of production, the basic factor is to estimate highly productive varieties (hybrids), adopted under stressful environmental conditions endowed with high levels of resistance to harmful pathogens can later be used in the process of plant improvement as initial genetic material.
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"Quarantine and surveillance strategies for plant pathogen detection and control." In 21st International Congress on Modelling and Simulation (MODSIM2015). Modelling and Simulation Society of Australia and New Zealand, 2015. http://dx.doi.org/10.36334/modsim.2015.f3.baxter.

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Lupascu, Galina, and Svetlana Gavzer. "Variabilitatea şi heritabilitatea vigorii boabelor de grâu comun la interacţiunea cu Drechslera Sorokiniana." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.68.

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The article presents data on the effects of the interaction of common wheat with the fungus Drechslera sorokiniana on grain vigor. Its differentiated action on germination and seedling length (LP) was found. The vigor index (VI) depended more on LP (r = 0.90 *) than on the germination 278 level (r = 0.52 *, p≤0.05). The coefficient of heritability in the broad sense (h2) was 71.3% for LP and 60.1% – for VI. The association of h2 and genetic progress with high values reveals the pronounced contribution of additive genetic variance in the control of the vigor index, which offers increased opportunities in the selection of wheat plants resistant to this pathogen in restricted terms.
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Stingaci, Aurelia, and Leonid Volosciuc. "Biotehnologii avansate de obținere a preparatului biologic în scopul combaterii dăunătorilor." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.30.

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Biopesticides have also attracted great interest in the international research community, with a significant increase in the number of publications devoted to the subject. At Institute of Genetics, Physiology and Plant Protection are prepared the bioinsecticides for use in Republic Moldova, mostly for the control In order to reduce the population of insect it is recommended utilization inoffensive preparations baculoviruses highly-pathogenic for the leaf-champing vermis of the H.cunea,were selected from the insect natural populations which is an efficient preparation for combating this pest in agricultural, onamental and forest biocenosis. This study aimed to highlight new agents for biological control of pest..
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Kalaiselvi, V. K. G., J. Ranjani, D. Pushgara Rani, S. M. Vignesh Kumar, and S. Mohana Priya. "Deep Learning based Pathogen Infestation Detection In Plants." In 2021 5th International Conference on Intelligent Computing and Control Systems (ICICCS). IEEE, 2021. http://dx.doi.org/10.1109/iciccs51141.2021.9432106.

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Crucean, Stefan. "Principalii dăunători ale culturii nucifere din clasa Arachnida și manifestarea efectelor negative ale acestora." In International Scientific Symposium "Plant Protection – Achievements and Prospects". Institute of Genetics, Physiology and Plant Protection, Republic of Moldova, 2020. http://dx.doi.org/10.53040/9789975347204.04.

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This material results from the research of the nut culture in order to identify pathogenic organisms of the class Arachnida and to represent the effects of these organisms on tree organs. The research was made at the Botanical Garden Institute, Chișinău on a number of 300 trees. This paper includes the identification of the main pests of the class Arachnida, namely: the gall mite of walnut leaves (Aceria tristriata) and the disease named walnut blister mine caused by Aceria erinea. At the same time, the methods of pest control and the negative effects of their presence are exposed here.
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Drobotova, E. N. "Pests of essential oil crops grown at the Research Institute of Agriculture of Crimea." In CURRENT STATE, PROBLEMS AND PROSPECTS OF THE DEVELOPMENT OF AGRARIAN SCIENCE. Federal State Budget Scientific Institution “Research Institute of Agriculture of Crimea”, 2020. http://dx.doi.org/10.33952/2542-0720-2020-5-9-10-18.

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During the study, we found that 2019 was favourable for pests’ growth, development and spread. Cicadellidae and Aphidoidea were the most harmful and numerous ones that damaged essential oil plants. Salvia sclarea was the most susceptible among the studied plants. We also found that the number of pathogens did not exceed the economic injury level thanks to timely monitoring and weed control methods.
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Diánez, F., M. Santos, M. de cara, and J. C. Tello. "Evaluation of Crude Glycerol from Biodiesel Production as a plant pathogen control agent." In Proceedings of the II International Conference on Environmental, Industrial and Applied Microbiology (BioMicroWorld2007). WORLD SCIENTIFIC, 2009. http://dx.doi.org/10.1142/9789812837554_0007.

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Reports on the topic "Control plant pathogens"

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Harms, Nathan, Judy Shearer, James Cronin, and John Gaskin. Geographic and genetic variation in susceptibility of Butomus umbellatus to foliar fungal pathogens. Engineer Research and Development Center (U.S.), August 2021. http://dx.doi.org/10.21079/11681/41662.

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Large-scale patterns of plant invasions may reflect regional heterogeneity in biotic and abiotic factors and genetic variation within and between invading populations. Having information on how effects of biotic resistance vary spatially can be especially important when implementing biological control because introduced agents may have different Impacts through interactions with host-plant genotype, local environment, or other novel enemies. We conducted a series of field surveys and laboratory studies to determine whether there was evidence of biotic resistance, as foliar fungal pathogens, in two introduced genotypes (triploid G1, diploid G4) of the Eurasian wetland weed, Butomus umbellatus L. in the USA. We tested whether genotypes differed in disease attack and whether spatial patterns in disease incidence were related to geographic location or climate for either genotype. After accounting for location (latitude, climate), G1 plants had lower disease incidence than G4 plants in the field (38% vs. 70%) but similar pathogen richness. In contrast, bioassays revealed G1 plants consistently received a higher damage score and had larger leaf lesions regardless of pathogen. These results demonstrate that two widespread B. umbellatus genotypes exhibit different susceptibility to pathogens and effectiveness of pathogen biological controls may depend on local conditions.
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Safeguarding through science: Center for Plant Health Science and Technology 2009 Accomplishments. U.S. Department of Agriculture, Animal and Plant Health Inspection Service, February 2011. http://dx.doi.org/10.32747/2011.7296843.aphis.

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The Center for Plant Health Science and Technology (CPHST) provides scientific support for the regulatory decisions and operations of the Animal and Plant Health Inspection Service’s (APHIS) Plant Protection and Quarantine (PPQ) program in order to safeguard U.S. agriculture and natural resources. CPHST is responsible for ensuring that PPQ has the information, tools, and technology to make the most scientifically valid regulatory and policy decisions possible. In addition, CPHST ensures that PPQ’s operations have the most scientifically viable and practical tools for pest exclusion, detection, and management. This 2009 CPHST Annual Report is intended to offer an in-depth look at the status of our programs and the progress CPHST has made toward the Center’s long-term strategic goals. CPHST's work is organized into six National Science Programs: Agricultural Quarantine Inspection and Port Technology; Risk and Pathway Analysis; Domestic Surveillance, Detection, and Identification; Emergency Response; Response and Recovery Systems Technology - Arthropods; and Response and Recovery Systems Technology - Plant Pathogens and Weeds. the scientists of CPHST provide leadership and expertise in a wide range of fields, including risk assessments that support trade, commodity quarantine treatments, pest survey and detection methods, molecular diagnostics, biological control techniques, integrated pest management, and mass rearing of insects. Some highlights of significant CPHST efforts in 2009 include: Establishment of the National Ornamentals Research Site at Dominican University of California, Established LBAM Integrated Pest Management and Survey Methods, Continue to develop Citrus Greening/Huanglongbing Management Tools, and further European Grapevine Moth (EGVM) Response.
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