实验室观察证明中华草蛉(Chrysopa sinica)幼虫期平均能捕食桔全爪螨(Panonychus citri)1392头,最多2584头。小区试验按1:100—200比例释放初孵幼虫防治桔全爪螨,5天后叶螨虫口下降90.09％;对照区仅下降0.26％。草蛉释放量减少,效果也降低。当释放草蛉的果树上猎物大量减少时,草蛉幼虫就下树迁移。 1979—82年在四川南充等县进行田间试验,证明早春天敌尚未活动前,在桔全爪螨孵化盛期喷洒农药压低基数,4、6、6月挑治点片发生的害虫,5、6月释放草蛉,综合治理能收到良好效果,比单纯化防区节省农药62.5—83.4％,减少生产投资31.25％。从麦田采草蛉茧,室内养成虫获卵释放,是人工利用草蛉最经济有效的办法。 Laboratory observations show that the larval period of Chrysopa sinica predisposes to 1,392 panonychus citri, with a maximum of 2584 heads. Community test released 1: 100-200 proportion of newly hatched larvae to prevent and control citrus red mite, 5 days after the spider mite population decreased 90.09%; control area decreased only 0.26%. Grass 蛉 release reduced, the effect is also reduced. When a large number of prey on the release of the grass 蛉 fruit trees, the grass 蛉 larvae migrate under the tree. In 1979-82, a field experiment was conducted in counties of Nanchong, Sichuan Province to prove that pesticides were sprayed at the peak of the hatching period of Allium mongolicus until the early spring natural enemies were active. Pests were picked at the juncture of April, June and June, and 5,6 The release of grass mulberry leaves in a month can achieve good results through comprehensive treatment, saving 62.5-83.4% of pesticides and simplifying the production of 31.25% of the investment in production. Cocoon harvesting from the wheat field, the indoor development of eggs by the release of eggs, is the most economical and effective way to make use of the grass.