不同杀虫剂对番茄潜叶蛾的毒力及田间药效

Toxicity and field efficacy of different insecticides against Tuta absoluta

【目的】筛选防治番茄潜叶蛾的高效低风险药剂。【方法】选用9种以昆虫生长调节剂为主的杀虫剂进行毒力测定,并开展田间药效试验,测定9种杀虫剂的室内毒力和田间喷施后对番茄潜叶蛾的防治效果。【结果】室内毒力结果表明,10.5%甲维盐SC的毒力最高,48 h的LC 50值为0.061 mg•L^(-1),10%四氯虫酰胺SC也表现出良好的杀虫活性,LC 50值为0.064 mg•L^(-1)。9种药剂对番茄潜叶蛾的毒力大小排序为10.5%甲维盐SC>10%四氯虫酰胺SC>5%氟铃脲EC>30%灭蝇胺SC>25%灭幼脲SC>50000 IU•mg^(-1) Bt-G033A WP>20%虫酰肼SC>22%氰氟虫腙SC>50%氟啶脲EC。田间防效结果表明,药后3~14 d防效16.67%~85.33%,其中30%灭蝇胺SC处理见效速度快、持效期长、防治效果佳,施药后14 d其田间防治效果可保持在65.00%,高于其他药剂(P<0.05)。其次是25%灭幼脲SC和20%虫酰肼SC在施药后14 d其田间防治效果仍保持60%,高于其他药剂(P<0.05)。【结论】30%灭蝇胺SC、25%灭幼脲SC和20%虫酰肼SC最适合作为防治番茄潜叶蛾的首选药剂。

【Aim】The main goal was to screen highly efficient and low-risk insecticides for controlling Tuta absoluta.【Method】A total of nine insecticides based on insect growth regulators were selected for toxicity and field efficacy testing.Indoor toxicity of nine insecticides and their control effects after field spraying were determined.【Result】The results of indoor toxicity showed that 10.5%emamectin benzoate SC had the highest toxicity,with the LC 50 value at 48 h was 0.061 mg•L^(-1).Moreover,10%tetrachlorantraniliprole SC also exhibited good insecticidal activity,with an LC 50 value of 0.064 mg•L^(-1).The order of toxicity of the nine insecticides to tomato leaf miner moth:10.5%emamectin benzoate SC>10%tetrachlorantraniliprole SC>5%hexaflumuron EC>30%cyromazine SC>25%chlorbenzuron SC>50000 IU/mg Bt-G033A WP>20%tebufenozide SC>22%metaflumizone SC>50%chlorfluazuron EC.The results of field control showed that the control effect ranged from 16.67%to 85.33%,3 d to 14 d after application.Among them,treatment with 30%cyromazine SC treatment demonstrated fast effect,prolonged duration,and effective control.The field control effect could be maintained at 65.00%14 d after application,which was higher than that of other pesticides(P<0.05).This was followed by 25%chlorbenzuron SC and 20%tebufenozide SC,with the field control effect for 30%cyromazine SC remained at 60%14 d after application,which was higher than other agents(P<0.05).【Conclusion】In conclusion,30%cyromazine SC,25%chlorbenzuron SC,and 20%tebufenozide SC were identified as the most suitable pesticides for controlling T.absoluta.