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采用树干钻孔注药防治害虫,不仅操作简便、效果显著,而且省药、省工、不污染空气和伤害天敌,既可防治天牛、吉丁虫等蛀干害虫,又可防治蚜虫、蚧壳虫、螨类等食叶的害虫,是一种较好的防治方法。现根据多年的防治实践,谈谈树干注药应注意的几个问题。一、注药时期:在树木芽萌动期至落叶前的生长期都可进行,以4～8月份的生长期效果最好,具体注药时间应根据防治的害虫生活史,确定其最佳注药时间。树木落叶后至萌动前的休眠期不能注药。
It is not only easy to operate and remarkable effect, but also saves medicine, saves labor, does not pollute the air and injures the natural enemies. It can not only prevent the pests such as the beetles and the jylintons, but also prevent the aphids, Beetles, mites and other food insects, is a better method of prevention and treatment. Now based on years of prevention and control practices, to talk about the trunk injection of drugs should pay attention to several issues. First, the injection period: Sprout in the tree bud to the deciduous before the growth period can be carried out in April to August the best growing season, the specific injection time should be based on pest life control, to determine the best injection Drug time. After deciduous trees to pre-dormancy dormant period can not be injected drugs.