Seed infection takes place when rain occurs during flowering. There are no foliar symptoms. Seeds are stained with a purplish-brown color, reducing quality. Disease management includes planting disease-free seed, using resistant cultivars, and seed treatment.
Taken from Kansas State University Agricultural Experiment Station and Cooperative Extension Service Publication #C-449. Soybean Diseases, Dr. Douglas J. Jardine, Extension State Leader, Plant Pathology Program.