落叶松针叶的质量对落叶松毛虫影响的研究

Study on Effect of Quality of Larch Foliage on Denderolimus superans(Butler)

本文研究了落叶松针叶质量对落叶松毛虫生殖、生存及发育速度的影响．结论是：落叶松毛虫成虫有选择产卵环境的趋向，发育状况优良、产卵能力强的雌虫更倾向于在落叶松针叶质量优良的未受害或受害轻微的林分中产卵，而发育状况差、产卵能力弱的雌虫则倾向于在原危害区产卵；饲喂不同林龄针叶的落叶松毛虫产卵量差异显著，取食林龄小于４０ａ针叶的落叶松毛虫的产卵量比取食林龄大于４０ａ的高；饲喂不同危害区落叶松针叶的落叶松毛虫１～２龄幼虫，其幼虫发育速度差异不显著，而幼虫死亡率差异显著，取食严重危害区落叶松针叶的１～２龄幼虫死亡率明显高于取食轻度危害区的．

The paper studied the reproduction survival and development of Dendrolimus suparans(Butler),and results are as follows:well- developed,high- depoisited female adults of larch moths prefered to depoisit-ing eggs in lightly damaged of normal larch forests with good- quality foliage,however badly-developed,low-depoisited female moth trented to laying eggs in their damaged forests. The number of eggs laid of femalemoths feeded on foliage from different years old forests had remarkable distinction,and the number of egg laidof female moths feedecl on foliage from younger forests was higher. As for 1 to 2 instar larvae feeded on thefoliage from different damaged forests,both rates of development hadn't remarkable distinction,however bothmortality had remarkable distinction,1 to 2 instar larvae feeded on foliage from seriously damaged forest hadhigher mortality.