甘薯猿叶虫(Chrysochus chinensis Baly)是南方山区和丘陵地带—种甘薯的重要害虫,成虫取食嫩梢、嫩叶、茎皮与叶柄;幼虫食害根部,能钻进块根内蛀成孔洞,发生多时,便显著的影响了甘薯的产量和品质。 由于此虫的成虫对666与DDT的抗药力较大,施用一般杀虫浓度的这一类药剂,都不能收到防除效果。今年5月间,我试用农药“敌百虫”(含有效成分50％的液体,上海信诚化工厂新近的出品)进行杀除成虫试 Chrysochus chinensis Baly is an important pest of sweetpotato in the mountainous and hilly areas of the South China. Adults feed on young shoots, young leaves, bark and petioles. The larva eats the roots and drills into roots and moth into holes A long time, it significantly affected the sweet potato yield and quality. Due to the adult worm on the 666 and DDT greater resistance, the general concentration of pesticides to use this type of agent, can not receive control effect. May this year, I try the pesticide “trichlorfon” (containing the active ingredient 50% of the liquid, Shanghai Xincheng Chemical Plant recently produced) to kill adults test