二化螟是危害我市水稻的主要害虫之一,每年在我市盛发2代,钻蛀为害,造成枯鞘、枯心或白穗,严重影响产量。为探索最佳防治药剂和防效,笔者用杀螟丹做了田间药效及对比试验,现将结果报告如下:一、试验条件1.供试药剂50%杀螟丹可溶性粉剂(兴农药业上海有限公司提供);对照:90%杀虫 Chilo suppressalis is one of the major pests that endanger the rice in our city. Each year, two generations of chrysanthemum in our city flourish and borers damage, resulting in dead sheath, withered or white spike, seriously affecting the yield. In order to explore the best prevention and treatment of pesticides and control effects, the author made a field efficacy and comparative test using cartap chock, the results are reported as follows: First, the test conditions 1 for 50% test pesticide Cartap soluble powder (Hing pesticides Industry Co., Ltd. Shanghai); control: 90% insecticide