Soybeans

Amy Mayer/IPR file photo

This summer's hot weather could bring down soybean yields for some farmers.

Iowa State University extension is alerting farmers that hot, dry conditions are what the disease charcoal rot waits for. Daren Mueller, an ISU extension plant pathologist, says once it attacks, there's little a farmer can do.

"At this point it's more of trying to scout and figure out what fields would have that pathogen in it to make decisions in future years," he says, "the next time you planted soybeans."