The excessive rains and cool temperatures during early summer created conditions that favor certain diseases. Besides iron chlorosis, growers and agronomists from co-ops report occurrence of Phytopathora, Fusarium wilt, brown stem rot, and soybean brown spot, which is prevalent in many soybean fields. This article focuses on brown spot.
Iowa State University
Yang, X. B., "Soybean brown spot and bacterial blight" (2003). Integrated Crop Management News. 1610.
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