芽果霉心病是四川省苹果生产区阿坝、甘孜、凉山三个自治州最重要的病害之一,危害严重时果实采收期发病率可达70—80%),并能引起贮藏期的果实腐烂。我们曾对其病原作过研究,发现交链孢(Alter-naria spp)占61.8—68.1%,A.alternata占整个交链孢的85%。交链孢是较难防治的,曾报道用多种药剂防治的效果都不够理想。对霉心病的研究也缺少较全面和系统的研究,尤其是越冬问题涉及甚少。为 Buds and molds are the most important diseases in three autonomous prefectures of Aba, Garze and Liangshan in the apple producing area of ​​Sichuan Province. The incidence of the fruit is up to 70-80% when the damage is serious, and can cause fruit decay during storage . We have studied the pathogen and found that Alter-naria spp accounted for 61.8-68.1%, A.alternata accounted for 85% of the entire Alternaria. Alternaria is more difficult to prevent and control, has been reported with a variety of agents to prevent the effect is not ideal. There is also a lack of comprehensive and systematic research on the pathogenesis of mildew, especially the overwintering problem. for