For many years, the only viable alternative for management of the soybean cyst nematode (SCN) has been the use of resistant varieties. Problems arise because the nematode is readily able to adapt to resistance, resulting in SCN types that can reduce the yields of varieties labeled as resistant. In order to provide alternative tactics for SCN management, several commercial companies are in the process of developing seed treatments intended to protect developing seedlings from infection. Some of these products are based on biological agents. The combination of biocontrol and seed treatment, if effective, would provide soybean farmers with an environmentally friendly, economically rational,...