近年来我区一些地区松毛虫危害面积仍然很大,猖獗周期从过去的5—6年变为1—2年,甚至没有明显的规律,出现了年年治虫、年年有灾的局面,已遭到了“农药恶性循环”的惩罚。过去防治松毛虫,都是偏重于治标方面,其原因是有些同志不了解松毛虫的发生为害的规律和森林具有的自控能力;或产生 In recent years, some areas in our region, the area of ​​harmful effects of pine caterpillars is still large, the rampant cycle from the past 5-6 years into 1-2 years, and even no obvious laws, there has been annual pest control, disaster situation has been It was punished by the vicious circle of pesticides. In the past, the prevention and control of the pine caterpillars were all based on the principle of stopping symptoms. Some of them did not understand the laws of the damage caused by the pine caterpillars and the self-control ability of the forests.