Plant pathologists at Iowa State University and University of Kentucky have confirmed that isolates of Cercospora sojina, the pathogen that causes frogeye leaf spot of soybean, have shown resistance to quinone outside inhibitor (QoI, strobilurin) fungicides in Iowa.
Iowa State University
Mueller, Daren S., "Frogeye Leaf Spot Fungicide Resistance Confirmed in Iowa Soybean" (2018). Integrated Crop Management News. 2462.
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