Soybean Sudden Death Syndrome (SDS) is widespread in Iowa. This year has had one of the worst epidemics since the disease was found in Iowa in 1994. Severely infested soybean fields can be found in every region in Iowa. It is easy to spot brown patches caused by SDS while you are driving the highways. Fields with large portions of premature defoliation can be found in early August.
Iowa State University
Yang, Xiao-Bing, "Soybean Sudden Death Syndrome in a Flood Year - What to Do Next" (2010). Integrated Crop Management News. 391.
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