larch casebearer

基本解释

This paper introduces the life history and habits of Northern China's larch casebearer in Shanxi province, and puts forward some comprehensive preventive measures.
对华北落叶松鞘蛾在山西省的生活史及其生活习性作了介绍，并提出了综合防治措施。
Early and late frost, Dedrolimus superans, sawfly and needle cast of larch could reduce the quality and quantity of foods of larch casebearer and had indirect effects on its population density.
早霜、晚霜、松毛虫、叶蜂及落叶松早期落叶病等都能直接影响鞘蛾食物的质量和数量，进而间接地使鞘蛾种群密度降低。