First Report of Resistance of Phytophthora infestans to Metalaxyl in Eastern Washington and Southwestern British Columbia. K. L. Deahl, USDA-ARS, Vegetable Laboratory, Plant Sciences Institute, Beltsville, MD 20705. S. P. DeMuth, G. Pelter, and D. J. Ormrod. USDA-ARS, Vegetable Laboratory, Plant Sciences Institute, Beltsville, MD 20705; Washington State University, Pullman 99164; and British Columbia Ministry of Agriculture, Fisheries and Food, Surrey, V3S 4P9 Canada. Plant Dis. 77:429. Accepted for publication 11 December 1992. Copyright 1993 The American Phytopathological Society. DOI: 10.1094/PD-77-0429C.