Powdery Mildew of Brassica spp. in Wyoming. A. Karakaya, Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie 82071-3354. F. A. Gray, and D. W. Koch. Department of Plant, Soil and Insect Sciences, University of Wyoming, Laramie 82071-3354. Plant Dis. 77:1063. Accepted for publication 18 June 1993. Copyright 1993 The American Phytopathological Society. DOI: 10.1094/PD-77-1063A.