松瘿小卷蛾生物学特性的研究

STUDY ON THE BIONOMIC OF LASPEYRESIAZEBEANA

松瘿小卷蛾Ｌａｓｐｅｖｒｅｓｉａｚｅｂｅａｎａ（Ｒａｔｚ．）是落叶松人工林一种重要的枝梢害虫。在黑龙江省两年发生一代，跨３个年度。当年和翌年９月未或１０月初分别以幼龄幼虫和老龄幼虫越冬，第３年度５月初开始化蛹，５月下旬开始羽化，５月末开始产卵．６月中、下旬幼虫孵化。幼虫期有两种寄生蜂，寄生率为２５％左右。

Laspeyesia zebeana(Ratz.)is an important branch pest on the afforested larchforest.The pest happens one generation in two years in Heilongjiang Province,overwinters two times in early and last larva stage in late September or earlyOctober of the first and second year. Pupa stage begins from.the early May in third year,the adults emerge in late May,and lay eggs in the end of May.Larvae emerges from middle to late June.There are two species of parasitoids onlarvae,and the parasits rate is about 25%.