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研究了云南松毛虫(DendrolimushouiLajonquière)的生物学特性及发生与林分因子的相关性。结果表明:云南松毛虫在景东县1年2代,以2,3龄幼虫越冬。幼虫和蛹的空间分布均为聚集分布。采用逐步回归分析法,筛选出影响云南松毛虫发生的5个关键因子:海拔高度、坡向、开阔度、林分结构、土壤综合肥力。总结了虫源地林分和有虫不成灾林分的特点,虫源地林分特征为海拔小于1550m,阳坡或半阴半阳坡、开阔度小、土壤综合肥力差、纯林;有虫不成灾林分特征为海拔大于1550m,阴坡、大开阔度、土壤综合肥力良好、混交林。
The biological characteristics of Dendrolimus houi-Lajonquière and its relationship with occurrence and stand factors were studied. The results showed that in Yunnan 1 year and 2 generations, the pine moths overwintered with the 2nd and 3rd instar larvae. The spatial distribution of larvae and pupae was aggregated. Stepwise regression analysis was used to screen out 5 key factors affecting the occurrence of Dendrolimus punctatus in Yunnan Province: altitude, aspect, openness, stand structure, soil fertility. The characteristics of the forest stands of insect and insects were summarized. The characteristics of the forest stands were less than 1550m above sea level, the sunny or semi - Unbroken forest insects are characterized by an elevation of more than 1550m, a shady slope, a large open area, and good overall soil fertility. Mixed forests.