The Issue of Races of Colletotrichum graminicola Pathogenic to Corn. R. L. Nicholson, Associate Professor, Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907. H. L. Warren, Research Plant Pathologist (SEA, USDA), Department of Botany and Plant Pathology, Purdue University, West Lafayette, IN 47907. Plant Dis. 65:143-145. . This article is in the public domain and not copyrightable. It may be freely reprinted with customary crediting of the source. The American Phytopathological Society, 1981. DOI: 10.1094/PD-65-143.

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

Keyword(s): corn anthracnose, Zea mays L.