果实套袋是提高果实外观质量和减少农药残留的有效措施 ,近年来大面积应用于苹果等果树 ,取得明显效益。但在推广应用过程中 ,许多地方出现了苹果苦痘病、痘斑病加重和果面发生黑点的问题 ,致使果实等级和售价降低 ,达不到增收目的 ,反遭受意外损失 ,亟待寻求解决办法。苹果苦 Fruit bagging is an effective measure to improve the appearance and quality of fruits and reduce pesticide residues. In recent years, fruit bagging has been applied to apples and other fruit trees in large areas, with obvious benefits. However, in the process of popularization and application, the problem of apple bitter pox, chicken pox disease and black spots on the fruit surface appeared in many places, which resulted in the decrease of fruit grade and selling price, which could not reach the purpose of increasing income. Solution. Apple bitter