Pear Scab in Oregon: Symptoms, Disease Cycle and Management

Robert A. Spotts and Steve Castagnoli
EM 9003 | Published May 2010, Reviewed 2023


This publication gives a concise description of the causes, symptoms, and disease cycle of pear scab. It also describes the OSU-MCAREC three-part model to predict scab risk and help time fungicide sprays. Integrating nonchemical methods and fungicide applications optimized with the OSU-MCAREC model can result in production of high-quality pears with reduced production costs, and multiple benefits from lower pesticide use, such as lower risk of resistance development, reduced environmental loading of pesticides, and reduced pesticide exposure.

About the authors

Robert A. Spotts
Professor emeritus
Mid-Columbia Agricultural Research and Extension Center

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