0.5%甲氨基阿维菌素苯甲酸盐微乳剂对烟青虫的防治效果研究

 2006年5～8月于云南省通海县九街乡烟站， 对0.5%甲氨基阿维菌素苯甲酸盐微乳剂（商品名：科满）在烟田防治烟青虫的效果进行了研究。结果表明，烟田喷雾使用0.5%甲氨基阿维菌素苯甲酸盐微乳剂后，对烟青虫有良好的防治效果，施药后虫口减退率及防治效果明显，在剂量为450 mL/hm²时，药后第2d，5d，10d和14d防效分别为95.4%，96.6%，96.9%和97.1%，虫口减退率分别为95.4%,96.3%,96.7%,96.7%，在低剂量150 mL/hm²时的防效分别为88.1%，93.1%，92.3%和91.6%，虫口减退率分别为88.8%，94.1%，95.8%和93.4%。与2.5%氯氟氰菊酯乳油相比，在用药后5～14d，两者在虫口减退率及防治效果间无明显异，而该药剂为高效无公害抗生素类杀虫剂，符合无公害农业生产需求。因此。该研究结果为烟青虫防治无公害药剂筛选及使用剂量均具有重要的指导意义。

Control Efficacy of Emamectin Benzoate 0.5% ME Against the Helicoverpa Assulta(Guenee)

Test on the control efficacy of Emamectin Benzoate 0.5% ME against the Helicoverpa assulta(Guenee) was carried out in Tonghai county tobacco planting area,in Yunnan province,from May to August,2006.Results showed that emamectin benzoate 0.5%ME has a good effect on the control of oriental tobacco budworm,H.assulta(Guenee).The control efficacy was 95.4%,96.6%,96.9% and 97.1%,the density decrease was 95.4%,96.3%,96.7%,96.7% under the application concentration of 450 mL/hm2.in the day of 2,5,10 and 14 after the application,respectively.The control efficacy was 88.1%,93.1%,92.3% and 91.6%,density decrease 88.8%,94.1%,95.8% and 93.4% by using it at the lower dose of 150 mL/hm2.The control efficacy and density decrease were same with that 2.5% lambda-cyhalothrin at the same application for the control of H.assulta(Guenee).This result is very useful for the pesticide selection on the control of H.assulta(Guenee).