松毛虫的大量发生，严重威胁着林业生产的发展。为了战胜虫害，每年都要投入大量的人力物力以消灭害虫，由于长期使用化学农药，使害虫抗药性不断增强，并又使化学农药的用量不断的增加，这样一来，就会严重的破坏了自然间的生态平衡。近年来，朝阳市森防站在松毛虫的防治工作 Dendrolimus occurred in large numbers, a serious threat to the development of forestry production. In order to defeat the insect pests, a large amount of manpower and material resources are spent every year to eliminate the pests. As the long-term use of chemical pesticides increases the resistance of the pests, and in turn, increases the amount of chemical pesticides, which in turn can severely damage The ecological balance between nature. In recent years, Chaoyang City Forest Prevention Station in the prevention and control of pine caterpillars