Anthracnose, caused by Colletotrichum dematium (Pers. ex Tr.) Grove var. truncatum (Sahw.) Arx., can be found in most U.S. soybean producing areas. It is the most prominent disease in much of the southern U.S. and for the Texas Gulf Coast. In recent years, estimates of yield losses caused by anthracnose in the southern U.S. have exceeded 28 million bushels per year, a 2.5% loss in potential yield (Sturgeon, 1980).