Abstract
Contrary to a report by others, 7 isolates of C. graminicola were not distinguished as physiological races. Lesion type and size were determined on corn inbreds Mo940 and 33-16 seven days after inoculation. The inbred Mo940 was susceptible to each isolate and the inbred 33-16 was hypersensitively resistant to each isolate. Thus, the 7 isolates were not distinguished as races on these corn inbreds.