马尾松毛虫是丽水地区主要森林害虫,过去涉及丽水地区马尾松毛虫生活史的文献资料很少有关于第三代的记载,但根据丽水地区气温较高、降水多、相对湿度大的特点,属于南京林产工业学院薛贤清划分的川、湘、赣、浙温暖湿润山地丘陵区类,有可能出现第三代马尾松毛虫。为了确认丽水地区马尾松毛虫第三代是否存在,我们在丽水白云山脚马尾松纯林内建立0.5亩标准地,从第一代卵期开始,每隔三天调查一次,在站内进行灯诱成虫观察,并配合缙云县飞防工作进行 Dendrolimus punctatus is the main forest pest in Lishui area. In the past, the literature about the life history of Dendrolimus punctatus in Lishui area was seldom recorded in the third generation. However, according to the characteristics of high temperature, heavy precipitation and relative humidity in Lishui area, Nanjing Forestry Industry Xue Xianqing divided Sichuan, Hunan, Jiangxi, Zhejiang warm and humid mountain hilly areas, there may be the third generation of Masson pine caterpillars. In order to confirm the existence of the third generation of Dendrolimus punctatus in Lishui, we set up a standard of 0.5 mu in pure Pinus massoniana forest in Lishui. From the first generation of eggs, we investigated once every three days, , And cooperate with Yunfei Yunfei work