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落叶松毛虫是我国北部落叶松上的重要食叶害虫。为了更加经济、有效地抑制其大发生,保护森林生态平衡,我们在细致地研究了松毛虫生物学特性之后,对防治方法进行了进一步探讨。落叶松毛虫在黑龙江省以2-5龄幼虫于9-10月开始在枯枝落叶层内越冬,翌年4月中旬上树继续危害。抓住松毛虫上树之际进行防治是有利时机。因为:松毛虫幼虫经一个冬季的休眠,抵抗力很低,且都集中在树干基部;松毛虫尚未取食,对落叶松还没产生危害,此时对落叶松局部树干用药,即节省人力和物力,
Dendrolimus caterpillars is an important leaf-eating pests on the larch in northern China. In order to control its occurrence more economically and effectively and to protect the ecological balance of the forest, we conducted a further study on the control methods after studying the biological characteristics of the pine caterpillars carefully. Larix caterpillar in Heilongjiang Province to 2-5 instar larvae began in September-October in the litter layer of winter, mid-April the following year to continue the damage on the tree. It is a good time to take control of the pine tree on the tree. Because: Dendrolimus larvae after a winter dormancy, resistance is very low, and are concentrated in the base of the trunk; pine caterpillars have not yet eaten, the larch has not yet produced harm to the local trunk of larch medication, this saves manpower and Material and material resources,