Prevention and Detection of Fungicide Resistance Development in Rhizoctonia zeae from Soybean and Corn in Nebraska

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dc.contributor.authorGambhir, Nikita
dc.contributor.authorKodati, Srikanth
dc.contributor.authorHuff, Matthew
dc.contributor.authorSilva, Flavio [UNESP]
dc.contributor.authorAjayi-Oyetunde, Olutoyosi
dc.contributor.authorStaton, Margaret
dc.contributor.authorBradley, Carl
dc.contributor.authorAdesemoye, Anthony O.
dc.contributor.authorEverhart, Sydney E.
dc.contributor.institutionUniversity of Nebraska
dc.contributor.institutionUniversity of Tennessee
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversity of Wisconsin
dc.contributor.institutionUniversity of Kentucky
dc.date.accessioned2022-04-28T19:50:14Z
dc.date.available2022-04-28T19:50:14Z
dc.date.issued2021-01-01
dc.description.abstractThegoalofthisresearch was to advance the foundational knowledge required to quantify and mitigate fungicide resistance in Rhizoctonia zeae, the seedling disease pathogen ofsoybean and corn. In vitro sensitivity to azoxystrobin, fludioxonil, sedaxane, and/or prothioconazole was determined for 91 R. zeae isolates obtained mostly from soybean and corn fields in Nebraska. Isolates were sensitive to flu-dioxonil, sedaxane, and prothioconazole (EC50 <3 µg/ml) and had a positively skewed EC50 distribution. Isolates were not sensitive to azoxystrobin in vitro (EC50 > 100 µg/ml) or in planta. Application of azoxystrobin did not significantly decrease disease severity or improve total dry weight of the soybean plants (P > 0.05). The risk of resistance developmentin R. zeae was estimated by characterizing its population structure. Eighty-one R. zeae isolates were genotyped using six microsatellite markers. Results showed that the population has a mixed mode of reproduction and is structured according to geographic region, suggesting limited dispersal. These population characteristics suggest that R. zeae has an intermediate risk of resistance development. Overall, this research establishedthecurrent status of fungicide sensitivity in R. zeae in Nebraska and estimated its risk of resistance development, which can inform fungicide resistance management for R. zeae.en
dc.description.affiliationDepartment of Plant Pathology University of Nebraska
dc.description.affiliationWest Central Research and Extension Center University of Nebraska
dc.description.affiliationDepartment of Entomology and Plant Pathology University of Tennessee
dc.description.affiliationDepartment of Plant Protection Sao Paulo State University
dc.description.affiliationDepartment of Plant and Earth Science University of Wisconsin
dc.description.affiliationDepartment of Plant Pathology University of Kentucky
dc.description.affiliationUnespDepartment of Plant Protection Sao Paulo State University
dc.format.extent465-469
dc.identifierhttp://dx.doi.org/10.1094/PHP-11-20-0100-SYN
dc.identifier.citationPlant Health Progress, v. 22, n. 4, p. 465-469, 2021.
dc.identifier.doi10.1094/PHP-11-20-0100-SYN
dc.identifier.issn1535-1025
dc.identifier.scopus2-s2.0-85123802690
dc.identifier.urihttp://hdl.handle.net/11449/223371
dc.language.isoeng
dc.relation.ispartofPlant Health Progress
dc.sourceScopus
dc.subjectAzoxystrobin
dc.subjectFludioxonil
dc.subjectFungicide resistance management
dc.subjectFungicide sensitivity
dc.subjectGlycine max
dc.subjectPopulation structure
dc.subjectProthioconazole
dc.subjectRisk of resistance development
dc.subjectSedaxane
dc.subjectZea mays
dc.titlePrevention and Detection of Fungicide Resistance Development in Rhizoctonia zeae from Soybean and Corn in Nebraskaen
dc.typeArtigo

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