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一、导言云南松毛虫是云南松、思茅松和柳杉的主要害虫之一。在贵州除危害柳杉以外,还危害侧柏、马尾松和华山松,尤其是对侧柏纯林危害最为严重。影响林木的正常生长甚至导致死亡。自1979年以来,该虫在安顺、遵义等地不断发生,并且有继续蔓延的趋势。今年,普定县共有的1000多亩柏树林,由于遭受云南松毛虫危害,成灾面积就达700多亩,占整个柏树
I. Introduction Yunnan pine caterpillars are one of the major pests of Pinus yunnanensis, Pinus kesiya and Cryptomeria. In addition to damaging cedar in Guizhou, but also endanger Platycladus orientalis, Pinus massoniana and Pinus armandii, especially the most serious damage to the Arborvitae pure forest. Affect the normal growth of trees and even lead to death. Since 1979, the insects have been happening continuously in Anshun and Zunyi and have continued to spread. This year, Puding County, a total of more than 1,000 acres of cypress trees, due to the damage caused by the Yunnan pine caterpillars, disaster area reached 700 acres, accounting for the entire cypress