两种杀虫剂对甘蓝蚜的毒力测定及室内药效试验

 在室内用氯氰菊酯、敌敌畏分别对甘蓝蚜［Brevicoryne brassicae(Linnaeus)］进行了毒力测定及防治试验。结果表明:氯氰菊酯和敌敌畏乳油对甘蓝蚜的ＬC₅₀分别为4.113 7,116.486 1 μg/mL,10%氯氰菊酯和80%敌敌畏乳油分别稀释成1 500～3 000倍液和1 500倍液对甘蓝蚜的室内防治效果较好,其药后第1～5 d的防效分别为75.3%～87.4%和76.7%～86.6%.

Toxicity Determination and Control Effects of Two Pesticides to Vegetable Aphis Brevicoryne brassicae in the Laboratory

Toxicity determination and control effect experiments of Cypermethrin and Dichlorvos to the vegetable aphis (Brevicoryne brassicae) were conducted in the laboratory. The results showed that the LC₅₀ of Cypermethrin and Dichlorvos were 4.113 7 μg／mL and 116.468 1 μg／mL respectively. When 10% Cypermethrin EC and 80% Dichlorvos EC were diluted at 1 500～3 000 times and 1 500 times respectively, the control effects were better to the vegetable aphis. Their effects were 75.3%～87.4% and 76.7%～86.6% for each during the first five days after application.