防治甜菜夜蛾混剂最佳配方筛选及田间防效验证  

Screening of optimal formulations of insecticide mixtures and validation of the field efficacy against Spodoptera exigua

作　　者：周利琳 熊凯凡 王攀 杨帆 望勇 王小平[2] 司升云 ZHOU Lilin#;XIONG Kaifan#;WANG Pan;YANG Fan;WANG Yong;WANG Xiaoping;SI Shengyun(Institute of Vegetables,Wuhan Academy of Agricultural Sciences,Wuhan 430345,China;College of Plant Science and Technology,Huazhong Agricultural University,Wuhan 430070,China)

机构地区：[1]武汉市农业科学院蔬菜研究所,武汉430345 [2]华中农业大学植物科学技术学院,武汉430070

出　　处：《农药学学报》2023年第3期668-677,共10页Chinese Journal of Pesticide Science

基　　金：国家科技型中小企业技术创新基金(蔬菜高效低毒农药应用技术研究服务平台)。

摘　　要：为延缓甜菜夜蛾抗药性发展及筛选高效混配药剂,采用交互测定法和共毒系数法评价了不同配方混剂对甜菜夜蛾的联合作用,并对具有增效作用的混剂进行了田间药效试验验证。交互测定法初筛和共毒系数法复筛结果表明:虫螨腈与高效氯氰菊酯混配配比为7:3~12:1(有效成分质量比1.20:1.00~6.23:1.00)时对甜菜夜蛾具有增效作用,其中二者配比为9:1 (有效成分质量比4.63:1.00)时共毒系数最高,为314.72,增效作用最明显。选择二者配比为7:3、9:1和11:1 (有效成分质量比1.20:1.00、4.63:1.00和5.71:1.00) 3个组合进行田间药效验证,与单剂相比,3个组合在中等用量(有效成分75.0 g/hm^(2))及高用量(有效成分100.5g/hm^(2))下,对甜菜夜蛾药后各天的防效均有提高,药后第3天最高防效可达93.58%。研究表明,虫螨腈与高效氯氰菊酯按有效成分质量比1.20:1.00~6.23:1.00混配对甜菜夜蛾均有增效作用,可用于武汉地区甜菜夜蛾种群的防治,推荐混配剂的有效成分用量为75.0~100.5 g/hm^(2)。In order to delay the development of the insecticide resistance and screen the highly efficient mixtures against Spodoptera exigua(Hübner),the interaction assay and co-toxicity coefficient method were used to evaluate the synergistic effects of different mixtures on S.exigua,and the field efficacy trial was conducted to verify the synergistic mixtures.The results of initial screening by interaction assay and rescreening by co-toxicity coefficient method showed that the proportion of chlorfenapyr and beta-cypermethrin at 7:3-12:1(mass ratio of active ingredients at 1.20:1.00-6.23:1.00)had the synergistic effect on S.exigua,and the proportion of 9:1(mass ratio of active ingredients at 4.63:1.00)had the highest co-toxicity coefficient of 314.72,and the synergistic effect was the greatest.The three mixtures with the proportion of 7:3,9:1 and 11:1(mass ratio of active ingredients at 1.20:1.00,4.63:1.00 and 5.71:1.00)were selected for the field efficacy test.Compared with the single insecticides,the control efficacies of these three mixtures were improved at middle dosage(75.0 g a.i./hm^(2))and high dosage(100.5 g a.i./hm^(2))on each day after treatment against S.exigua,and the highest control efficacy reached 93.58%on the third day after treatment.According to the above results,the mass ratio of active ingredients of chlorfenapyr and beta-cypermethrin at 1.20:1.00-6.23:1.00 had the synergistic effect on S.exigua,which could be used for the control of S.exigua in Wuhan,and the recommended dosage was 75.0-100.5 g a.i./hm^(2).

关 键 词：甜菜夜蛾 杀虫剂混配 增效作用 共毒系数 防治效果 

分 类 号：S481.3[农业科学—农药学]