The pear scab fungus (Venturia pyrina Aderh.) has been in
Oregon for many years. It has become a serious economic problem
in the main pear-growing districts since 1932. Of all diseases, scab
causes the most consistent depreciation of Oregon's 6-million-box
pear crop, although pear blight may be more spectacular during...
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...