几种杀虫剂防治甘蓝菜青虫药效试验

Effectiveness Tests on Several Pesticides Against Cabbage Worm Pieris rapae L. in the Field

田间试验结果表明:4.5%高效氯氰菊酯乳油20 ml/667m2、2.5%溴氰菊酯乳油20 ml/667m2、20%氰戊菊酯乳油30 ml/667m2、25%杀螨隆乳油40 ml/667m2、85%甲萘威可湿性粉剂65 ml/667m2、20%甲萘威@氰戊菊酯乳油50 ml/667m2等杀虫剂单剂和复配剂对甘蓝菜青虫具较好的防治效果,且持效期长,对蔬菜安全,药后2 d防效在88.52%~99.15%,药后7 d防效在94.25%~99.05%.

The results of field trial showed that 4.5% alphacypermethrin EC at the rate of 20 ml/667m2, 2.5% deltamethrin EC at the rate of 20 ml/667m2, 20% fenvalerate EC at the rate of 30 ml/667m2, 25% diafenthiuron EC at the rate of 40 ml/667m2, 85% carbaryl WP at the rate of 65 ml/667m2, 20% carbaryl-fenvalerate at the rate of 50 ml/667m2 had better control effect and long persistence against cabbage butterfly, Pieris rapae L.. Their controlling efficacy was 88.52%~99.15% and 94.25%~99.05% during 2 days and 7 days after treatment, respectively.