As machinery rolls back into fields to restart harvest 2018, wet weather seems to have brought another issue to Kansas agriculture.

According to a tweet from Kansas State University Plant Pathologist Dr. Doug Jardine, at least one Kansas elevator has rejected loads of soybeans due to “purple” beans.

Soybeans can be stained purple by the fungi Cercospora Kikuchii, which favors damp, humid conditions and temperatures around 75 degrees or higher. The fungal pathogen does not often affect yield, but can damage the quality of soybeans because of the stained color.

Jardine said rains from August through the beginning of October likely contributed to the increased growth; however, he said higher instances in the state are most likely contained to east of the Flint Hills.

“I got a tweet from my counterpart in Missouri that said they were seeing some quality issues with it as well,” Jardine said.

Erik Lange, senior vice president and chief operating officer for Mid-Kansas Cooperative, agreed. Lange said purple seeds have turned up at MKC elevators in central Kansas, but not in quantity to cause concern.

“We have seen small amounts of purple beans at some of our locations, but they have not been at levels that would be financially detrimental to our member-owners or our locations,” Lange said. “It is still early into soybean harvest, but as of today we are not anticipating further issues with purple beans.”

Cercospora can also be a foliage disease, causing a purple tint to the leaves of soybean plants. It occurs in Kansas often, but is usually not a large concern to growers, according to Jardine.

“In most years producers wouldn’t even spray it when they see it because we don’t know how bad it’s going to be,” Jardine said. “But every once in a while we get a lot of rains in August and September and don’t get away with it.”