This presentation will help consultants, growers, and other agricultural professionals in U.S. soybean production regions to scout and identify soybean stem canker. Diaporthe species cause seed decay, stem blight, and stem canker, resulting in yield losses. Diaporthe longicolla, the causal agent of Phomopsis seed decay, has been reported to cause stem disease on soybean in the north central United States. This presentation will cover symptoms produced by the causal agents of soybean stem canker and how the two Diaporthe species, D. longicolla and D. caulivora, vary in aggressiveness. Finally, the few available management options are discussed.
