菜青虫是蔬菜上的一种主要害虫,尤其嗜食甘蓝、花椰菜等,在夏秋季节发生世代多、危害重。习惯上菜农对这种害虫的防治偏重使用化学农药,从而造成其抗药性增强,防治效果下降,对蔬菜污染严重。经过多次试验证明,采用1％的石灰水或3％的过磷酸钙浸出液,在菜粉蝶(菜青虫成虫)主发世代的产卵始盛期和高峰期 Pieris rapae is a major vegetable pests, especially addicted to cabbage, cauliflower, etc., occurred in the summer and autumn more than generations, endangering heavy. Accustomed to farmers on the prevention and control of this pest emphasis on the use of chemical pesticides, resulting in enhanced resistance, prevention and control of the decline in serious pollution of vegetables. After several tests proved that the use of 1% lime water or 3% superphosphate leachate, cabbage butterfly (Pieris adults) main generation of the spawning period and peak