Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"fungicide sensitivity"”.
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Phytophthora nicotianae: Fungicide Sensitivity, Fitness, and Molecular Markers
… resistance to this compound and to investigate fungicide resistance management strategies. Phytophthora nicotianae, a destructive pathogen of numerous herbaceous and some woody ornamental plants, was used as a model system. P. cinnamomi, a major pathogen of a wide range of tree species and shrub …
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Fungicide Sensitivity of Erysiphe necator and Plasmopara viticola from Virginia and nearby states
This study was undertaken to determine the sensitivity of grape downy mildew (DM, Plasmopara viticola) and powdery mildew (PM, Erysiphe necator) to commonly used single-site fungicides in Virginia and nearby states. DM and PM isolates were collected from 2005 to 2007. In grape leaf disc bioassays, …
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Genetic diversity and fungicide sensitivity of Rhizoctonia solani associated with soybean seedling disease
… to members of this species, seed treatment fungicides have become increasingly important as a management option. However, our knowledge of the groups associated with soybean seedlings, the genetic structure of the pathogenic groups, as well as their potential for adaptation to fungicide seed …
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Detection of new Calonectria spp. and Calonectria Diseases and Changes in Fungicide Sensitivity in Calonectria scoparia Complex
Le specie appartenenti al genere Calonectria sono state associate ad un'ampia gamma di piante ospite, causando vari sintomi di malattia e presenti in tutto il mondo. Su colture orticole, le specie di Calonectria sono state riportate per lo più nell'emisfero settentrionale, soprattutto in giardini …
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Evaluation of race population distribution, fungicide sensitivity, and fungicide control of Exserohilum turcicum, the causal agent of northern leaf blight of corn
… NLB control. Demethylation inhibitor (DMI) fungicides have been labeled for corn use since the early 1990s; in this dissertation a study was conducted to measure E. turcicum baseline sensitivity to DMI fungicides and monitor shifts in sensitivity over years. Metconazole, propiconazole, and …
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Characterization, development of a field inoculation method, and fungicide sensitivity screening of the Pythium blight pathogen of snap bean (Phaseolus vulgaris L.)
… bean (Phaseolus lunatus L.) and in New Jersey. Fungicide labeling and cultivar selection for Pythium blight management is hindered by difficulties associated with conducting successful trials, because the disease occurs sporadically and clustered in the field. Three P. aphanidermatum-infested …
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Characterization of oomycete species causing soybean diseases in Illinois and management applications
… for Ph. sansomeana. The aggressiveness and fungicide sensitivity of the isolates was also evaluated. Aggressiveness assays were performed in the greenhouse for Phytophtora spp. isolates, and a petri plate assay was used to assess the aggressiveness of Pythium isolates. Ph. sojae was more …
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Genotypic characterization and fungicide resistance monitoring for Virginia populations of Parastagonospora nodorum in wheat
… practices, resistant varieties, and foliar fungicides. There are increasing trends of severity and incidence of SNB in Virginia and the surrounding mid-Atlantic region, but it is not known if changes in the pathogen population are contributing to this trend. The overall goal of this research …
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The chemotaxonomy of the fungal genus Endothia fr.
… Polyacrylamide gel electrophoresis and fungicide sensitivity assays were also used to examine biochemical relationships among the organisms and to establish additional means of distinguishing among the closely related taxa. The morphological features of 12 species of <i>Endothia</i> were …
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Characterization of Fungicide Resistance in Venturia inaequalis Populations in Virginia
… of apples that is predominantly controlled with fungicides. Of the chemical classes currently available, the sterol-inhibiting (SI) and strobilurin (QoI) fungicides are the most commonly used. Recent observations indicate that V. inaequalis populations in Virginia have developed resistance to …
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Cercospora sojina: over-winter survival and fungicide resistance
… monitoring of Quinone outside inhibitor (QoI) fungicide resistance in C. sojina. QoI fungicides have been effective in managing frogeye leaf spot, but the risk of selecting C. sojina strains with resistance to this class of fungicides is considered high. A QoI fungicide resistance monitoring …
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Accurate identification and grouping of Rhizoctonia isolates infecting turfgrasses in MD and VA and their sensitivity to selected fungicides in vitro
… 1-IB and AG 2-2IIIB from isolates of other AGs. Sensitivity of Rhizoctonia species and AGs was tested in vitro to commercial formulations of iprodione, triticonazole and pyraclostrobin. W. circinata isolates were moderately sensitive to iprodione while isolates of R. solani and BNR were extremely …