Promising Organisms for Biocontrol of Nematodes. Richard M. Sayre, Nematology Laboratory, Plant Protection Institute, AR/SEA, USDA, Beltsville, MD. Plant Dis. 64:527. 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, 1980. DOI: 10.1094/PD-64-527.