１９８９年以来，作者在山东省高青、惠民、博兴、东平等地发现苹果叶片于生长期大量枯死，其上长出浓密的菌丝层和大量菌核。查阅国内文献未见记载，自１９９２年开始立项进行研究，本文是该病害的鉴定结果。１　症状和病情初期枝表面有白色菌丝蔓延，后经叶柄蔓延至叶背，叶 Since 1989, the authors found that apple leaves died in large numbers during the growing season in high-green, huimin, Boxing, and Dongping prefectures of Shandong Province, and grew thick mycelium layers and a large number of sclerotia. Access to domestic literature has not been documented, since 1992, the project started research, this article is the identification of the disease. 1 Symptoms and disease early branches surface white mycelium spread, after the petioles spread to leaf back, leaves