Dr. Walsh is the research director of the Environmental and Agricultural Entomology Laboratory located at the Irrigated Agriculture Research and Extension Center in the Yakima Valley near Prosser, Washington. He is the extension integrated pest management coordinator for Washington State and the Washington state liaison representative to the USDA IR-4 Program.
Dr. Walsh has an extensive and varied IPM research and extension program, assisting regionally important commodities including hops, alfalfa, grapes, mint, and livestock. Dr. Walsh also directs environmental impact studies on alfalfa leafcutting and alkali bees, the key pollinators of alfalfa produced for seed. Dr. Walsh’s efforts in IPM have resulted in the reduction of over 100,000 pounds of insecticide use in the Pacific Northwest annually. Dr. Walsh serves on various advisory boards including the National Alfalfa and Forage Alliance, Salmon Safe, and LIVE (low input viticulture and enology) programs.