![]() The maritime climate with mild year-round temperatures, abundant winter rains, and cool-humid summers is critical in the development and virulence of this disease. In areas west of the Cascade Mountains, apple anthracnose is caused by the fungus Neofabraea malicorticis (synonyms Pezicula malicorticis, Cryptosporiopsis curvispora). ![]() Other potential disease-causing species are Neofabraea alba and Cryptosporiopsis kienholzii. The geographical distribution of Neofabraea species varies significantly with the environment, with tree cankers (apple anthracnose canker) west of the Cascade Mountains attributed to Neofabraea malicorticis, whereas tree cankers (perennial canker) east of the Cascade Mountains are attributed to Neofabraea perennans. Species within the fungal genus Neofabraea are the causal agents responsible for production of apple tree cankers and Bull’s-eye fruit rot. ![]() The cankers serve as the source of inoculum for inciting the fruit rot phase of the disease and can limit long-term orchard productivity. The fungus produces cankers on trees and a post-harvest fruit rot known as “Bull’s-eye rot”. Apple anthracnose is a fungal disease that significantly impacts apple production in the maritime Pacific Northwest and in regions with similar climates. ![]()
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