众所周知,套袋可优化果园的生态环境,改善果品外观质量和内在品质,降低农药在果面的残留,减少病虫侵害,有效防治轮纹病及蛀果害虫的发生。但随着套袋技术的大力推广,生产上又出现了另一些病虫害的危害,在苹果上主要是黑点病的危害,并有加重的趋势。我们经过一个多月 It is well-known that bagging can optimize the ecological environment of orchards, improve the quality and inherent quality of fruit appearance, reduce pesticide residue on the fruit surface, reduce pest and disease infestation, and effectively prevent occurrence of ring rot and fruit pests. However, with the popularization of bagging technology, another pest and disease hazard has appeared in the production. The main cause of the black spot disease in apples is aggravating trend. We have been through more than a month