Conquering Phytophthora Root Rot with Resistant Alfalfa Cultivars. F. I. Froshelser, Agricultural Research, SEA, USDA, and University of Minnesota, St. Paul. Plant Dis. 64:909. 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-64-909.