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于 1997～ 1998年研究了华北落叶松鞘蛾ColeophorasinensisYang的发育进度 ,其中包括生活史、成虫羽化进度、幼虫化蛹进度、幼虫发育的 4个龄期确定等。同时研究了虫口密度与华北落叶松林Larixprincipis rupprechtiiMary受害等级的关系 ,制定出该虫防治的虫口密度指标
The developmental stages of Coleophora sinensisYang were studied from 1997 to 1998, including the life history, progress of adults emergence, larval pupation progress and larval development of 4 instars. At the same time, the relationship between insect population density and Larix principis rupprechtiiMary damage degree of Larix principis-rupprechtii was studied, and the insect density index