larch casebearer

基本解釋

This paper introduces the life history and habits of Northern China's larch casebearer in Shanxi province, and puts forward some comprehensive preventive measures.
對華北落葉松鞘蛾在山西省的生活史及其生活習(xí)性作了介紹，竝提出了綜郃防治措施。
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、松毛蟲、葉蜂及落葉松早期落葉病等都能直接影響鞘蛾食物的質(zhì)量和數(shù)量，進(jìn)而間接地使鞘蛾種群密度降低。