落叶松毛虫[Dendrolimus Superans(Butler)]危害以落叶松为主兼有红松、油松等松树的食叶性害虫。故应对其制定出一套经济和技术上可行的控制计划。然而,只有事先掌握虫情,方能收到预期效果。本文就松毛虫下一代发生程度及发生数量,采用判别分析和回一归分析等方法,进行了研究。现概述如下: 一、落叶松毛虫种群与主要环境因子关系影响昆虫种群数量的环境因子,可归纳为:天敌因子、食物因子和气候因子。天敌因子对落叶松毛虫现已发现其各虫期天敌种类有100多种,其数量消长对松毛虫的 Dendrolimus Superans (Butler) harms leafy insects mainly composed of larch and pine and other pine trees. Therefore, it should formulate a set of economic and technically feasible control plans. However, only the prior knowledge of the bug can receive the expected result. In this paper, the occurrence and the number of the next generation of pine caterpillars, using discriminant analysis and back to the regression analysis and other methods were studied. Are summarized as follows: First, the population of Dendrolimus caterpillar and the main environmental factors affect the number of insect populations environmental factors, can be summarized as: natural enemy factors, food factors and climate factors. Natural enemies of the deciduous pine caterpillars have been found in its various stages of the natural enemies of more than 100 species, the decline in the number of Dendrolimus