DISTRAIN: a Computer Program for Training People to Estimate Disease Severity on Cereal Leaves. J. R. Tomerlin, Germplasm Quality and Enhancement Laboratory, Plant Genetics and Germplasm Institute, and T. A. Howell, Research Automation Staff, United States Department of Agriculture, Agricultural Research Service, Beltsville, MD 20705. Plant Dis. 72:455. Copyright 1988 American Phytopathological Society. DOI: 10.1094/PD-72-455.