氰氟虫腙对草地贪夜蛾的毒力与田间防效  

Toxicity and field efficacy of metaflumizone against the fall armyworm,Spodoptera frugiperda(Lepidoptera:Noctuidae)

作　　者：殷雪 方小涵 牛多邦 廖敏[1] 盛成旺 操海群[1] YIN Xue;FANG Xiao-Han;NIU Duo-Bang;LIAO Min;SHENG Cheng-Wang;CAO Hai-Qun(Anhui Province Key Laboratory of Integrated Pest Management on Crops,School of Plant Protection,Anhui Agricultural University,Hefei 230036,China)

机构地区：[1]安徽农业大学植物保护学院,作物有害生物综合治理安徽省重点实验室,合肥230036

出　　处：《昆虫学报》2023年第1期63-70,共8页Acta Entomologica Sinica

基　　金：安徽省自然科学基金项目(2008085QC159);安徽省科技重大专项(201903a06020027);大学生创新创业训练项目(S202010364264)。

摘　　要：【目的】本研究旨在明确氰氟虫腙对草地贪夜蛾Spodoptera frugiperda幼虫的毒力水平和田间防治效果,为科学使用氰氟虫腙防治草地贪夜蛾提供参考依据。【方法】采用饲料混毒法在室内测定了氰氟虫腙与4种常用杀虫剂甲维盐、氯虫苯甲酰胺、虱螨脲和茚虫威对草地贪夜蛾3和6龄幼虫的致死中浓度(LC_(50))及LC_(90)值,以及LC_(90)浓度的这些杀虫剂对3龄幼虫的致死中时(medium lethal time,LT_(50))值。采用人工喷雾方法测定了玉米田中22%氰氟虫腙悬浮剂(6.6 g/667 m^(2))、22%氰氟虫腙悬浮剂(17.6 g/667 m^(2))、5.7%甲维盐水分散剂(1 g/667 m^(2))和150 g/L茚虫威悬浮剂(2 g/667 m^(2))对草地贪夜蛾幼虫的防效。【结果】室内生测结果显示,供试的5种杀虫剂中氰氟虫腙对草地贪夜蛾3和6龄幼虫均具有较高的毒力,其LC 50值分别为2.64和4.36 mg/kg,对6龄幼虫的毒力仅次于甲维盐。此外,LC 90浓度的氰氟虫腙对草地贪夜蛾3龄幼虫的LT 50值为11.98 h,与茚虫威的(11.50 h)相当,低于氯虫苯甲酰胺、甲维盐和虱螨脲的LT 50值(分别为17.20,23.40和39.24 h)。田间药效实验显示,17.6 g/667 m^(2)的22%氰氟虫腙悬浮剂对草地贪夜蛾幼虫具有良好的防治效果,在施药后1,3和7 d时校正防效分别为69.97%,78.98%和82.86%,均与1 g/667 m 25.7%甲维盐水分散剂的防治效果无显著差异。【结论】本研究结果表明,氰氟虫腙对草地贪夜蛾幼虫具有快速良好的室内杀虫活性,对6龄幼虫杀虫活性尤为显著;且对草地贪夜蛾具有良好的田间防治效果,说明氰氟虫腙可用于中国草地贪夜蛾的防治。【Aim】This study aims to determine the toxicity level and field control efficacy of metaflumizone against the larval fall armyworm,Spodoptera frugiperda,and to provide a reference for scientific use of metaflumizone in the control of S.frugiperda.【Methods】The median lethal concentration(LC_(50))and LC_(90)values of metaflumizone and four commonly used insecticides including emamectin benzoate,chlorantraniliprole,lufenuron and indoxacarb against the 3rd and 6th instar larvae of S.frugiperda and the medium lethal time(LT_(50))values of these insecticides at the concentration of LC 90 against the 3rd instar larvae were determined in the laboratory with diet-incorporated method.Simultaneously,the control efficacies of 22%metaflumizone suspension concentrate(6.6 g/667 m^(2)),22%metaflumizone suspension concentrate(17.6 g/667 m^(2)),5.7%emamectin benzoate water dispersant(1 g/667 m^(2)),and 150 g/L indoxacarb suspension concentrate(2 g/667 m^(2))against S.frugiperda larvae were determined in corn field by artificial spray approach.【Results】Laboratory bioassay results revealed that among the tested five insecticides metaflumizone showed higher toxicity to the 3rd and 6th instar larvae of S.frugiperda,with the LC_(50)values of 2.64 and 4.36 mg/kg,respectively,and its toxicity to the 6th instar larvae of S.frugiperda was only lower than that of emamectin benzoate.The LT_(50)value of metaflumizone at the concentration of LC_(90)against the 3rd instar larvae of S.frugiperda was 11.98 h,comparable to that of indoxacarb(11.50 h)and lower than those of chlorantraniliprole,emamectin benzoate and lufenuron(17.20,23.40,and 39.24 h,respectively).Field efficacy test showed that 22%metaflumizone suspension concentrate at the application rate of 17.6 g/667 m^(2)had an excellent control efficacy against S.frugiperda larvae,with the corrected control efficacies of 69.97%,78.98%and 82.86%at 1,3 and 7 d after application,respectively,showing no significant difference from that of the control agent 5.7%emamectin benzoate water

关 键 词：草地贪夜蛾 氰氟虫腙 毒力 致死时间 田间防效 

分 类 号：Q965.9[生物学—昆虫学]