黄野螟防治药剂筛选试验

利用浸渍法在室内测定了10种和4种农药分别毒杀黄野螟高龄和低龄幼虫的药效试验,结果表明:对高龄幼虫,1.8%阿维菌素乳油500万倍液,0.5%甲维盐微乳剂500万倍液,森得保可湿性粉剂800倍液,2.5%多杀菌素悬浮剂5 000倍液,90%敌百虫晶体20 000倍液,15%茚虫威悬浮剂3 000倍液和4.5%高效氯氰菊酯乳油1000倍液的致死率均达100%;对低龄幼虫,4.5%高效氯氰菊酯乳油4 000倍液和森得保可湿性粉剂1 000倍液的致死率分别为100%和97.7%。在林间,阿维菌素或甲维盐500万倍液、森得保1 000倍液的杀虫效果均达100%。

A screening experiment on insecticides against Heortia vitessoides Moore

The control techniques of Heortia vitessoides were studied in the laboratory by leaf-dipping method.The results showed that the 5.0×106 dilution of 1.8% avermectins EC,5.0×106 dilution of 0.5% emamectin benzoate microemulsion,800 dilution of Sendebao(the mixture of avermectin B1a and Bacillus thuringiensis) wettable powder,5 000 dilution of 2.5% spinosad suspensions,20 000 dilution of 90% dipterex crystal,3 000 dilution of 15% indoxacarb suspensions,and 1 000 dilution of 4.5% beta-cypermethrin EC had significant effects on controlling the high instar larvae,and the lethality of all insecticides was reached 100%.The lethality of 4 000 dilution of 4.5% beta-cypermethrin EC and 1 000 dilution of Sendebao WP to the low instar larvae was 100% and 97.7%,respectively.In the forests the control effects of 5.0×106 dilution of avermectins or emamectin benzoate and 1 000 dilution of Sendebao were reached 100%.