生物安全学报（中英文）2025，Vol.34Issue(2)：155-161,179,8.DOI:10.3969/j.issn.2095-1787.20240052
福建省草地贪夜蛾对5种常用杀虫剂的抗药性
Resistance monitoring of the fall armyworm,Spodoptera frugiperda to five commonly used insecticides in Fujian Province
摘要
Abstract
[Aim]To clarify the relatively sensitive baselines and resistance levels of Spodoptera frugiperda to five commonly used insecticides in Fujian Province,and evaluate the sensitivity of young larvae of S.frugiperda to these insecticides.[Method]The tox-icities of the five commonly used insecticides towards the 1st and 2nd instar larvae of the relatively sensitive population of S.frugiper-da were determined using the leaf dipping method.Monitoring resistance of S.frugiperda populations from three different regions to these insecticides was performed.The 95％ confidence limits of LC50 values that did not overlap were used as the criterion for judging the significant differences in sensitivity of the same instar larvae from different geographical populations or between the 1st and 2nd instar larvae of the same population to the same insecticide.[Result]The toxicities of the five insecticides to the larvae of the rela-tively sensitive population of S.frugiperda were as follows:emamectin benzoate＞spinetoram＞chlorantraniliprole＞lufenuron＞indox-acarb.The insecticides exhibited higher toxicity to the 1st instar larvae than to the 2nd instar.The data obtained in the toxicity tes-ting of emamectin benzoate,spinetoram,and lufenuron on the 1st instar larvae of S.frugiperda showed a smaller chi-square value and larger P-value than that for the 2nd instar larvae,whereas in the toxicity testing of chlorantraniliprole and indoxacarb,the 1 st instar larvae showed slightly larger chii-square value than that for the 2nd instar larvae,but their P-values were both above 0.9190.The results indicated that the degree of resistance of S.frugiperda field populations from the three different regions to emamectin and indoxacarb was at the stage of decreased sensitivity to low-level resistance in Fujian,and that the pest had developed low resistance to chlorantraniliprole.The degree of resistance of the three different geographical populations to spinetoram was at the stage of de-creased sensitivity,however all populations maintained sensitivity to lufenuron.[Conclusion]The population of S.frugiperda re-mained sensitive to lufenuron in Fujian Province.Overall,the resistance degree of the pest was at a stage of decreased sensitivity or low-level resistance to the other four common insecticides.Both the 1st and 2nd instar larvae are suitable for the toxicity testing of insecticides against S.frugiperda;however,the 1st instar larvae that hatched within 12 h without feeding are more suitable than the 2nd instar larvae.关键词
草地贪夜蛾/杀虫剂/浸叶法/敏感基线/毒力/抗药性Key words
Spodoptera frugiperda/insecticide/leaf dipping method/sensitive baseline/toxicity/resistance引用本文复制引用
邱良妙,陈秀琴,卢学松,刘必炮,刘其全..福建省草地贪夜蛾对5种常用杀虫剂的抗药性[J].生物安全学报（中英文）,2025,34(2):155-161,179,8.基金项目
福建省自然科学基金项目(2022J01459、2021J05088) （2022J01459、2021J05088）
福建省公益类科技计划项目(2021R1024008、2020R1024007) （2021R1024008、2020R1024007）
福建省"5511"协同创新工程项目(XTCXGC2021011) （XTCXGC2021011）
福建省农业科学院科技创新团队(CXTD2021002-1) （CXTD2021002-1）
福建省农业科学院科技自由探索项目(ZYTS202211) （ZYTS202211）
中央引导地方科技发展资金项目(2023L3059) （2023L3059）
