Widespread occurrence of quinone outside inhibitor fungicide-resistant isolates of cercospora sojina, causal agent of frogeye leaf spot of soybean, in the United States

Authors

Guirong Zhang, University of Illinois Urbana-Champaign
Tom W. Allen, Delta Research and Extension Center
Jason P. Bond, Southern Illinois University Carbondale
Ahmad M. Fakhoury, Southern Illinois University Carbondale
Anne E. Dorrance, Ohio Agricultural Research and Development Center
Linda Weber, Ohio Agricultural Research and Development Center
Travis R. Faske, University of Arkansas System Division of Agriculture
Loren J. Giesler, University of Nebraska–Lincoln
Donald E. Hershman, University of Kentucky Research and Education Center
Brenda S. Kennedy, University of Kentucky Research and Education Center
Danilo L. Neves, University of Kentucky Research and Education Center
Clayton A. Hollier, LSU Agricultural Center
Heather M. Kelly, University of Tennessee
Melvin A. Newman, University of Tennessee
Nathan M. Kleczewski, University of Delaware
Steve R. Koenning, NC State University
Lindsey D. Thiessen, NC State University
Hillary L. Mehl, Virginia Polytechnic Institute and State University
Tian Zhou, Virginia Polytechnic Institute and State University
Michael D. Meyer, Corteva Agriscience
Daren S. Mueller, Iowa State University
Yuba R. Kandel, Iowa State University
Paul P. Price, Louisiana State University Agricultural Center
John C. Rupe, University of Arkansas
Edward J. Sikora, Auburn University
Jeffrey R. Standish, College of Agricultural and Environmental Sciences Athens Campus
Maria Tomaso-Peterson, Mississippi State University
Kiersten A. Wise, Purdue University
Carl A. Bradley, University of Kentucky Research and Education Center

Document Type

Article

Publication Date

1-1-2018

Abstract

Isolates of Cercospora sojina, causal agent of frogeye leaf spot of soybean (Glycine max), were collected across Alabama, Arkansas, Delaware, Illinois, Indiana, Iowa, Kentucky, Louisiana, Mississippi, Missouri, North Carolina, Ohio, Tennessee, and Virginia and were evaluated for quinone outside inhibitor (QoI) fungicide resistance. Collection of these isolates from these 14 states occurred between 2010 and 2017. QoI fungicide-resistant C. sojina isolates were detected in all 14 states surveyed and represent a total of 240 counties or parishes. In 2017, these 240 counties and parishes represented approximately 13% of the harvested soybean hectares in the United States. In light of this widespread occurrence of QoI fungicide-resistant C. sojina isolates, management of frogeye leaf spot should focus on integrated management practices such as planting resistant soybean cultivars, rotating with nonhost crops, and tilling to speed up decomposition of infested soybean residue. When foliar fungicide application is warranted, fungicide products that contain active ingredients from chemistry classes other than the QoI class should be applied for frogeye leaf spot management.

Publication Source (Journal or Book title)

Plant Health Progress

First Page

295

Last Page

302

Recommended Citation

Zhang, G., Allen, T., Bond, J., Fakhoury, A., Dorrance, A., Weber, L., Faske, T., Giesler, L., Hershman, D., Kennedy, B., Neves, D., Hollier, C., Kelly, H., Newman, M., Kleczewski, N., Koenning, S., Thiessen, L., Mehl, H., Zhou, T., Meyer, M., Mueller, D., Kandel, Y., Price, P., Rupe, J., Sikora, E., Standish, J., Tomaso-Peterson, M., Wise, K., & Bradley, C. (2018). Widespread occurrence of quinone outside inhibitor fungicide-resistant isolates of cercospora sojina, causal agent of frogeye leaf spot of soybean, in the United States. Plant Health Progress, 19 (4), 295-302. https://doi.org/10.1094/PHP-04-18-0016-RS