作者王金友等报道,通过1988～1990年的研究,明确辽宁兴城地区苹果斑点落叶病菌主要在地面落叶病斑、树上徒长枝病斑、秋梢顶芽等部位以菌丝形态越冬.翌年苹果树发芽期开始,大量产生病菌孢子,直至6月雨季来临前.5月下旬至6月上旬,树上新病斑开始产生孢子,7～8月为产孢高峰期. The author Wang Jinyou and other reports, through the 1988 to 1990 studies, clear Xingcheng City, Liaoning apple spot leaf spot disease mainly in the ground deciduous lesions, tree branches only disease spot, fall tip bud and other parts of the mycelial form of winter .In the following year apple Tree germination period, a large number of bacteria spores, until the rainy season in June before late May to early June, the new spores began to produce spores, July to August sporulation peak.