绍兴市杨树主要食叶害虫发生规律及防治措施

杨扇舟蛾Lostera anachoreta、黄刺蛾Cnidocampa flavescens（Walker）是危害杨树的二种主要害虫。杨扇舟蛾在浙江省绍兴市1a发生5代，以蛹越冬。低龄幼虫期用0.3%阿维菌素乳油2000倍液、25%灭幼脲悬浮剂1500倍液、5%吡虫啉乳油1000倍液和BT可湿性粉剂800倍液喷雾防治效果分别达到98.2%、95.4%、92.6%和91.4%。黄刺蛾在浙江省绍兴市1a发生2代，以老熟幼虫越冬，低龄幼虫期用1.8%阿维菌素乳油1500倍液、森得保可湿性粉剂1500倍液、18%杀虫双水剂1000倍液和80%敌敌畏乳油1000倍液喷雾防治效果分别达到95.1%、91.3%、98.4%和93.7%。

Occurrence and control of defoliate pests on poplar tree in Shaoxin city

Lostera anachoreta, Cnidocampa flavescens （Walker） are two major pests damage on poplar trees,the former occurred 5 generations for one year in Shaoxin, and over wintered in pupae in cocoons. Spraying in young larva stage with 0. 3% Avermectin Ec 2000 times solution,5% chlorbenzuron Sc 1500 times solution,5% imidacriplod Ec 1000 times solution and BT WP 800 times solution can get effects 98.2% ,95.4% ,92.6% 和1 91.4%. The latter occurred 2 generations for one year in Shaoxin,and over wintered in matured larvae. Spraying in young larva stage with 0.3% Avermectin Ec 1500 times solution,Sedebon Wp 1500 times solution, 18% bisultap Sc 1000 times solution and 80% Dichlorvos Ec 1000 times solution can get effects 95.1% ,91.3% ,98.4% 和 93.7%.