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十字花科蔬菜是蔬菜主要种类之一,在其害虫的防治上,除了采取农业、物理、生物等防治措施外,化学防治占有重要地位。现根据多年实践经验,介绍一些符合无公害蔬菜生产要求的药剂防治方法。1.菜青虫菜青虫是甘蓝、花椰菜上最严重的害虫种类之一。防治时应抓住害虫发生初期,在虫口尚不大时防治,一般在甘蓝幼苗初期(2叶)百株有虫5头以上,团棵期(6～8叶)百株有虫15头以上,莲座期(10～24叶)百株有虫50头以上,成熟期(24叶以上)百株有虫
Cruciferous vegetables are one of the main types of vegetables. In the prevention and control of their pests, chemical prevention and control occupy an important position in addition to prevention and control measures such as agriculture, physics and biology. Now based on years of practical experience, introduced some of the pollution-free vegetable production requirements of pharmaceutical control methods. 1. Pieris brassicae Pieris is one of the most serious types of pests on cabbage and cauliflower. Prevention and control should seize the early pests, insects in the mouth is not yet large prevention and control, usually in the early stage of cabbage seedlings (2 leaves) a hundred insects 5 or more, Mission period (6 to 8 leaves) , Rosette stage (10 to 24 leaves) one hundred more than 50 insects, mature (more than 24 leaves) a hundred insects