Iowa State University researchers, with funding from soybean checkoff through the United Soybean Board and Iowa Soybean Association, have confirmed that over 70 isolates of the pathogen Cercospora sojina (cause of frogeye leafspot in soybeans in Iowa) are resistant to quinone outside inhibitor (QoI) fungicides.
Iowa State University
Mueller, Daren S. and Stoetzer, Ethan, "Instances of Frogeye Leaf Spot Resistance to QoIs Abundant in Iowa" (2020). Integrated Crop Management News. 2598.
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