Red crown rot of soybean has been found for the first time in Minnesota, according to a University of Minnesota report on Thursday, Oct. 9.
The disease was detected and confirmed in one field in southwestern Minnesota. This disease can cause significant yield loss in soybeans depending on severity, weather, and timing of disease development.
Red crown rot is caused by a soilborne fungal pathogen (Calonectria ilicicola) that infects the roots and lower parts of stems of soybean plants. It is considered an emerging disease in the Midwest, according to the Crop Protection Network.
Symptoms on leaves include yellow and brown patches between veins that are like symptoms of sudden death syndrome and brown stem rot. Red coloration (similar to Rhizoctonia stem rot) and reddish dots develop on