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近年来平昌县植保站在果园生物防治方面,总结了不少经验,概括起来有以下三种办法: 一、保护利用果园自然天敌。果树虫害的天敌种类十分丰富,初步调查,仅苹果树叶螨类的捕食性天敌,就有二十余种,如食螨瓢虫类、草蛉类、花蝽类、蓟马类、隐翅(虫甲)类等。这些主要天敌捕食量很大,如束管食瓢虫的成虫一天就捕食山楂叶螨成虫二十多头;若虫一生捕食近二百头。此外,寄生性天敌对消灭果园虫害也有很好效果,如卷叶
In recent years, Pingchang County Plant Protection Station in the orchard biological control, summed up a lot of experience, summed up in the following three ways: First, the protection or use of orchard natural enemies. There are more than 20 species of predatory natural enemies of apple tree mites, such as ladybugs, herbivores, stinkbugs, thrips, Insect A) category and so on. Predators of these major predators, such as Beetles tube ladybug adult one day predation hawthorn spider mite adult twenty; nymphs prey nearly 200. In addition, parasitic natural enemies have good effects on the eradication of orchards and insect pests, such as curly leaves