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Baseline susceptibility of the diamondback moth (Lepidoptera: Plutellidae) to Chlorantraniliprole in China

文献类型： 外文期刊

作者： Wang, Xingliang 1 ; Li, Xiangyong 2 ; Shen, Aidong 2 ; Wu, Yidong 1 ;

作者机构： 1.Nanjing Agr Univ, Coll Plant Protect, Key Lab Monitoring & Management Crop Dis & Pest I, Minist Agr, Nanjing 210095, Peoples R China

2.Yunnan Acad Agr Sci, Inst Agr Resources & Environm, Kunming 650205, Peoples R China

关键词： Baseline susceptibility;Chlorantraniliprole;Discriminating dose;Plutella xylostella;Resistance monitoring

期刊名称：JOURNAL OF ECONOMIC ENTOMOLOGY （ 影响因子：2.381； 五年影响因子：2.568 ）

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收录情况： SCI

摘要： Diamondback moth, Plutella xylostella (L.) (Lepidoptera: Plutellidae), has evolved resistance to various kinds of insecticides in the field. Chlorantraniliprole, which is a new pesticide of the anthranilic diamide group, provides potent and broad-spectrum activity within the insect order Lepidoptera. This insecticide provides a new option for control of P. xylostella populations resistant to other chemicals. The susceptibility of 16 field populations and seven laboratory maintained strains of P. xylostella to chlorantraniliprole were determined through leaf dip bioassay. The susceptibility variation among 16 field populations was low (five-fold), with median lethal concentrations (LC50 values) varying from 0.221 to 1.104 mg/liter. However, wider ranges of variation in LC50 values (10-fold) were observed among seven laboratory strains. Low level tolerance (six- to 10-fold) was detected in two laboratory-selected strains and three field-collected populations when compared with the susceptible Roth strain. A discriminating concentration (15 mg/liter) was calibrated from pooled toxicological data of the 16 field populations, as an important first step in resistance management, for the routine monitoring of resistance in the future. When assessed at the established discriminating dose 15 mg/liter, seven laboratory strains and five field populations showed an average mortality of 99.75% (from 98 to100%). Synergism assays showed metabolic enzymes might be involved in chlorantraniliprole detoxification in the susceptible Roth strain, but not in the additional observed tolerance of strains selected for resistance with other insecticides.

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