The field bioassay of 4 trunk injection insecticides(14% Imidacloprid+DDVP,4.5%Imidacloprid,2%Abamectin and 30%DDVP+omethoate) was conducted against Brontispa longissima.

• 利用14%25吡虫啉.；敌敌畏注干液剂、4