"Early detection of major quarantine postharvest pathogens of apple and pear in the U.S. Pacific Northwest" Dr. Arild R. Arifin, Department of Plant Pathology, Tree Fruit Research and Extension Center Washington State University Abstract: The postharvest pathogens Phacidiopycnis washingtonensis, Phacidiopycnis pyri, Sphaeropsis pyriputrescens, and Neofabraea spp. are important quarantine pathogens of apple and pear from […]