小菜蛾、菜青虫在北林区菜田普遍发生。特别是小菜蛾幼虫对药剂易产生抗性 ,为害逐年加重 ,株受害率达 80 %以上 ,平均减产 2 0 %左右 ,且品质劣化 ,经济效益下降。考虑到瑞德丰农药有限公司生产的阿维必虫清是生物性杀虫剂 ,有利于生产“无公害”蔬菜、提高生态效益和社会效益 Plutella xylostella, Pieris rapae commonly occur in vegetable fields in Beilin District. In particular, Plutella xylostella larvae are easy to produce the drug resistance, pests increased year by year, the strain rate of more than 80%, an average of 20% reduction in production, and the deterioration of quality, economic decline. Taking into account the production of Reid Fung Pesticide Co., Ltd. Abamectin Qing biological insecticide, is conducive to the production of “pollution-free” vegetables, improve ecological and social benefits