1965年7-9月间,我县白翅叶蝉猖獗为害二季晚稻,受害重的,稻叶枯萎,停止生长,甚至不抽穗或穗而不壮。应用25％DDT乳剂进行防治,效果仅为30-60％,不能有效地控制为害和蔓延。为了提高防治效果,各地普遍试用与推广了乐果乳剂进行防治。 根据作者在水边公社郭家、馆头、璃田三个大队和县良种繁育场的试验(结果如表),效果较好。一般在 From July to September 1965, the white-winged leafhopper in our county was rampant for the second season late rice, harmed seriously, the rice leaves withered, stopped growing, and did not even grow or spike but not strong. Application of 25% DDT emulsion control, the effect is only 30-60%, can not effectively control the damage and spread. In order to improve the effectiveness of prevention and control, universal testing and promotion of dimethoate prevention and treatment around. According to the author in the waterfront commune Guo, Guotou, glass field three brigade and county seed breeding field trials (results shown), the effect is better. General