摘要
杨干象在舒兰市1a发生1代,以卵及初龄幼虫越冬。翌年5月初,越冬幼虫开始活动,越冬卵也相继孵化为幼虫。5月中旬幼虫开始蛀道危害,6月中旬停止危害准备化蛹。利用辛硫磷和敌杀死进行注射和喷雾防治,效果可达80%。
Crypotorrhynchus lapathi, there is a generation per year in Jilin region of China. It overwintering in egg or first-instar larvae, at the beginning of May next year, hibernating larvae get active, and hibernating eggs also become larvae on after another. In the middle ten-day of May, the larvae do damage to poplars by burrowing; in the middle ten-day of Jun, stopping their damage prepares to pupate. Control tests of injecting and spraying by deltamethrin and phoxim showed the effectiveness of pesticides could be up to 80%.
出处
《吉林林业科技》
2003年第1期20-21,51,共3页
Journal of Jilin Forestry Science and Technology
关键词
杨干象
杨树害虫
生物学特性
危害
防治
Crypotorrhynchus lapathi
biological characteristic
control technique
