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早春刮除果树老翘皮,不仅能消灭山楂红蜘蛛、苹果小卷叶虫、梨星毛虫等越冬害虫,而且也会明显减轻苹果腐烂病、干腐病及轮纹病的发生。但是,在这些翘皮里也同时潜栖着很多害虫的天敌,如捕食性蜘蛛、小花蝽等,如果能保持和利用好这些害虫天敌,科学地刮除翘皮,将会收到更好的防虫效果。为此,我们在东郭苇场一个虫害较重的苹果园,对害虫、天敌在树体不同部位越冬数量进行了详细调查。
Scraping the old tree in early spring can not only eliminate the overwintering insect such as red spider moth, apple roller leafworm and pear star caterpillar, but also significantly reduce the incidence of apple rot, dry rot and ring rot. However, many natural enemies of pests, such as predatory spiders and small red bugs, also inhabit these skins, and will scientifically scrape off the skin if they are kept and used well. Pest control effect. For this reason, we conducted a detailed investigation on the number of overwintering pests and natural enemies in different parts of the tree in a heavily damaged apple orchard in the East Kwai Wai Farm.