Guide for grape pest management available Washington State University’s 2013 Grape Pest Management Guide includes recommendations for controlling insects, weeds, diseases, and other pests. The guide also includes results of 2012 fungicide efficacy trials, a table with Fungicide Resistance Action Committee (FRAC) codes for resistance management, and suggestions of fungicide timing. The guide comes in a pdf format or printed bulletin. To order, visit: https://pubs.wsu.edu and search for Extension ­Bulletin 0762 (EB 0762). Once you see a problem with powdery mildew in your vineyard, you’re already too late. Washington State University extension specialists want grape growers to focus on prevention, […]