Dr. Jay Brunner, Washington State University entomologist, right, explains the IPM strategies for control of codling moth and leafroller that are described in the Pest Management Transition Project handbook. by Keith Granger, Jay Brunner, and Nadine Lehrer, Washington State ­University A decision by the U.S. Environmental Protection Agency to phase out the use of Guthion (azinphos-methyl) in tree fruits will force many Washington State apple growers to change their pest management practices. Washington’s tree fruit industry is already recognized internationally as a leader in integrated pest management, and the use of organophosphate insecticides, including azinphos-methyl, has decreased dramatically over the […]