This guide is intended as a reference of the control and management tactics for important plant diseases in the Pacific Northwest. No attempt has been made to include all of the plant diseases that could possibly occur in the PNW. The specific cultural, biological and chemical recommendations are intended for a specific plant disease but may not always be appropriate under all production circumstances. The synthesis of a specific management recommendation should be done by a qualified individual. For this reason, this book should be used by - and has been expressly written for - County Extension agents, consultants, field and nursery people, and chemical industry representatives.