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马尾松毛虫(Dendrolimus punctatus Walker)是我国马尾松林危害最严重、分布最广泛的食叶害虫。为了预测这种害虫的发生数量和进行综合防治,我们采用生命表的方法,在浙江省余杭县长乐林场对湿地松林马尾松毛虫的各种死亡因子进行了系统的考察,分析了影响数量变动的各个因子的作用。本文报道的是1979年～1982年对越冬代松毛虫的研究结果,其它各代的考查材料将陆续整理成文。 马尾松毛虫在浙江余杭县一年发生2～3代,第一代发生期5月中旬～7月下旬,第二代7月下旬～10月上旬,第三代10月上旬到下一年的5月中旬。发生2代的年份,即第二代发育到下一年的5月中旬结束。马尾松毛虫以四龄幼虫越冬为主。这种害虫除危害马尾松(Pinus massoniana Lamb.)外,也取食湿地松(Pinus elliottii Engelm.)和火炬松(Pinus taeda L.)。
Dendrolimus punctatus Walker is one of the most harmful and widely distributed leaf-eating pests in Pinus massoniana in China. In order to predict the number of pests and to carry out integrated control, we used the life table method to systematically investigate the various mortality factors of Dendrolimus punctatus in Pinus elliotottii in Changle Forest Farm, Yuhang County, Zhejiang Province. The role of each factor. This paper reports the results of the research on overwintering Dendrolimus from 1979 to 1982, and the materials of other generations will be sorted out one after another. Masson pine caterpillars occur in Yuhang County, Zhejiang Province, 2 to 3 generations a year, the first generation occurred in mid-May to late July, the second generation in late July ~ early October, the third generation in early October to the next year Mid-May. The second generation of the year, the second generation of development until the middle of May of the next year. Dendrolimus punctatus fourth-instar larvae overwinter. In addition to Pinus massoniana Lamb, this pest also feeds Pinus elliottii Engelm. And Pinus taeda L.