摘要
本文对青杨天牛成虫进行了化学防治试验 ,确定了防治的最佳时期为成虫出孔盛期 ,即5℃以上积温达 339 4日度 ;利用浓度为 1∶4 0 0的 4 0 %氧化乐果、 2 5 %敌杀死、 5 0 %敌敌畏均取得较好的防治效果 ,其虫口减退率分别为 89 6 %、 6 1 1%、 6 0 3%。
Result of chemical control experiment on adult Saperda populnea shows that, the best controlling time was the peak period whey they are coming out of holes. When accumulated temperature over 5℃ reached at 339 4 ℃, using 1:400 of 40% omethoate, 2.5% decis and 50% dichlorvos, good control results can be obtained .The receding rate respectively are: 89.6%, 61.1% and 60.3%.
出处
《吉林林业科技》
2001年第4期45-47,共3页
Journal of Jilin Forestry Science and Technology
