尺蠖幼虫有吐丝下垂、在空中飘荡的习性和一步一曲,形似拱桥的行走方式,所以又俗称“吊死鬼”“步曲虫”或“造桥虫”。危害松树的尺蠖,统称为松尺蠖。松尺蠖是食叶性害虫,其繁殖力强,蔓延速度快,暴食针叶成灾,造成松树大量死亡。我省松尺蠖种类多,在昆明地区已造成灾害的至少有三种。据调查,海口林场1959—1962年、1984—1986年曾两次松尺蠖猖獗成灾,第一次发生面积多达万亩,第二次发生面积2380亩。阳宗海林场1982年有1300多亩松林发生灰星尺蠖。禄丰村林场尖山林区1985年以来有4500多亩华山松连遭松尺蠖为害,灾情严重,损失很大。据不完全统计,尖山林区共有尺蠖十多种,其中优势种有一种,寄主为华山松。为了搞好防治工作,首先要做好虫情的预测预报。不论是有发生历史的老灾区,还是开始发生的 Chickweed larvae have silky drooping, floating in the air and the habit of a step by step, similar to the way the arch bridge, it is also commonly known as “Hanging Death Ghost,” “Buqu worm” or “bridge bugs.” Hazardous pines of the pine, collectively referred to as pine 蠖. Siberian pine is a leaf-eating pest, its reproductive ability, rapid spread, gluttonous needle disaster, resulting in a large number of pine deaths. There are at least three kinds of troubles in our province that have caused disasters in Kunming. According to the survey, Haikou Forest Farm from 1959 to 1962, 1984-1986 twice slash pine rampant disaster occurred, the first occurrence of up to acres of area, the second occurrence of an area of ​​2380 acres. Yangzong Hailin field in 1982 there are 1300 acres of gray forest ash pine 蠖. Lufeng Village Forest Jianshan forest area since 1985, there are 4,500 acres of Huashan pine was slash 蠖 蠖 damage, the disaster was serious, a great loss. According to incomplete statistics, Jianshan Forest Area has a total of more than ten species, of which one is dominant and the host is Huashan pine. In order to do a good job prevention and control work, we must first make a good prediction of insects. Whether it is a historic disaster area, it is still happening