Gray Leaf Spot of Corn: A Disease on the Move. Frances M. Latterell, Plant Disease Research Laboratory, USDA-ARS, Frederick, MD. Albert E. Rossi, Plant Disease Research Laboratory, USDA-ARS, Frederick, MD. Plant Dis. 67:842. 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, 1983. DOI: 10.1094/PD-67-842.