[Objective ] The toxicity and control effects were tested in order to provide basis for pest control. [Method]Toxicity of 3 pesticides was tested in the lab,and then their control effects were tested in the field outside. [ Result]The toxicity order of the 3 researched pesticides showed that the toxicity LC50 of the pesticides against the 4th instar nymph of Calliptamus italicus ( L. ) was the highest, with the cantharidin reaching 0.885, Matrine s was 269.528 ,Beta - cypermethrins was 869. 887; the toxicity LC50of the 3 pesticides against the 5 th instar nymph of Calliptamus italicus (L. ) ranges from 1. 338 to 1 200. 808 mg/L;the toxicity LC50 against the adult of Calliptamus italicus (L. ) varies from 2.493 to 2 053. 894 mg/L. In the field control efficiency it can be concluded that 1% matrine SP had better control effect,and 7 days later,81. 8% effect could be achieved, and the second better one is 4. 5% Beta - cypermethrin EC. After its being used for 7 days, the control effect could reach 74% [Conclusion] 1% matrine SP and 4. 5% Beta - cypermethrin EC had better control effects in the field.%[目的]测定不同药剂对意大利蝗的毒力和田间防治效果,为防治该虫提供理论依据.[方法]室内测定不同药剂对意大利蝗4龄、5龄蝗蝻和成虫进行室内毒力测定和田间药效试验,并测定田间防治效果.[结果]3种药剂对意大利蝗的毒力LC50大小依次为:4龄蝗蝻对杀虫剂的毒力斑蝥素的毒力最高LC50为0.885mg/L,苦参碱和高效氯氰菊酯的毒力为269.528和869.887 mg/L.5龄蝗蝻对杀虫剂的毒力LC5o在1.338～1 200.808 mg/L；成虫对这几种杀虫剂的毒力Lc50在2.493～2 053.894mg/L;田间药效结果表明,苦参碱效果最好,药后7d的防效达到81.8％,其次是4.5％高效氯氰菊酯乳油药后7d防效达到74％.[结论]苦参碱可溶性粉剂田间防治效果较好.
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