Over the past several weeks, we have received several samples in the Plant and Insect Diagnostic Clinic with irregular blotches and necrotic lesions on the pods.
After eliminating all of the known causes, a sample was screened for several common bean viruses*. The sample came back strongly positive for tobacco streak virus (TSV).
Iowa State University
Mueller, Daren S. and Saalau Rojas, Erika, "Tobacco Streak Virus on Soybean Confirmed in Iowa" (2013). Integrated Crop Management News. 26.
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