不同杀虫剂防治三叶草斑潜蝇田间药效试验

在莴苣上进行了5种不同杀虫剂对三叶草斑潜蝇的田间药效试验。试验结果表明,各药剂对三叶草斑潜蝇均有一定的防治效果,其中50%灭蝇胺可湿性粉剂2500倍液的防治效果最好,药后10d防效达到79.45%,显著好于其他处理且持效期长;其次是2%甲维盐微乳剂3500倍液、1.8%阿维菌素乳油2500倍液、5%抑太保乳油1500倍液,药后10d防效均在50%以上;3%啶虫脒可湿性粉剂3000倍液处理防效较低,低于其他4种药剂。各个药剂在供试浓度下对莴苣生长均无不良影响,表现安全。

Field Efficacy Trials of Pesticides against Liriomyza trifolii

The effect of five pesticides against Liriomyza trifolii was tested in the field. The results showed that all the pesticides had certain control effect and 50% cyromazine WP 2 500 times had the best control effect of 79.45% on the 10th day; then 2% emamectin-benzoate ME 3 500 times, 1.8% avermectins EC 2 500 times and 5% chlorfluazuron EC 1 500 times had good control effect over 50% on the 10th day. The control effect of 3% acetamiprid WP 3 000 times was worse, which was lower than the other four pesticides. All the pesticides were safe to the tested crop without harmful effects.