Soybean diseases showing up in Iowa

August 8, 2016 4:46 PM
Blog Post

Several soybean diseases have become noticeable after recent rainfall across the state.

The following diseases are currently showing up regularly across Iowa soybean fields, depending on your location in the state:

  • Bacterial blight
  • Cercospora leaf blight
  • Downy mildew
  • Brown stem rot
  • Sudden death syndrome
  • White mold
  • Frogeye leaf spot

Some soybean diseases are not typically yield limiting in Iowa, such as bacterial blight, Cercospora leaf blight, and downy mildew, and others cannot be managed in-season, such as brown stem rot and sudden death syndrome. White mold and frogeye leaf spot have also been reported across Iowa. 

Be on the lookout for these diseases, and remember to please snap a picture of the disease and tweet it to @soydisease if you are on Twitter.

Related links:
Disease imposters
Tweet your corn and soybean diseases from the field this summer


Daren Mueller Professor

Daren Mueller is an associate professor and extension plant pathologist at Iowa State University. He is also the coordinator of the Iowa State Integrated Pest Management (IPM) program. Daren received his bachelor's degree from the University of Wisconsin-Madison in 1996, and his master's degree a...