摘要
通过调查 ,赤峰地区油松毛虫在树干垂直方向自下而上虫口分布百分率呈递减趋势 ,树干不同部位越冬松毛虫死亡率无显著差异 ,山坡不同坡向之间 ,山坡与平地之间树干上越冬松毛虫死亡率也无显著差异 ,树干上越冬的松毛虫仅占越冬总虫口的 3.7% ,且保持了 98%的高死亡率 。
In Chifeng, insect population distribution of Dendroltmus tabulaeformis Tsai et Liu progressively decreases on trunk vertically. There are no notable differences among the mortality of overwintering Dendrolimus tabulaeformis Tsai et Liu on different parts of trunks, directions of mountains slopes and between hillsides and plains. Only 3.7% of overwintering caterpillars are on trunk, and maintain a high mortality of 98%. It can t influence the winter control.
出处
《内蒙古林业科技》
2000年第S1期43-45,共3页
Journal of Inner Mongolia Forestry Science and Technology
关键词
油松毛虫
越冬
死亡率
冬季防治
Dendrolimus tabulaeformis Tsai et Liu
overwinter
mortality
winter control
