›› 2017, Vol. 29 ›› Issue (1): 73-80.DOI: 10.3969/j.issn.1004-1524.2017.01.11

• Plant Protection • Previous Articles     Next Articles

Detoxified enzymatic activities and insecticidal susceptibility of Cnaphalocrocis medinalis from different geographic populations

WANG Caiyun1, 2, YANG Yajun2, XU Hongxing2, ZHENG Xusong2, TIAN Junce2, LU Yanhui2, LYU Zhongxian2, *   

  1. 1. College of Chemistry and Life Science, Zhejiang Normal University, Jinhua 321004, China;
    2. State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Plant Protection and Microbiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2016-05-06 Online:2017-01-15 Published:2017-02-23

Abstract: Detoxified enzymatic activity and insecticidal susceptibilities are important characteristics of the insect populations. Understanding these characteristics of Cnaphalocrocis medinalis from different populations will promote the formulation of tactics on C. medinalis control. Detoxified enzymatic activity and insecticidal susceptibilities of Cnaphalocrocis medinalis from different geographic populations, Hepu (HP) and Nanning (NN) populations from Guangxi, Changsha (CS) population from Hunan and Hangzhou (HZ) population from Zhejiang were determined to clarify the population differences of C. medinalis, and the differences among four populations were discussed in this study. Results showed that activities of esterase, multi-function oxidase and glutathione S-transferase (GST) varied among C. medinalis larvae from 4 geographic populations. CS population had the highest enzymatic activities, while HP population had a lowest esterase activity, NN population had a lowest multi-function oxidase activity and HP, NN, and HZ population had similar GST activity. Bioassay data showed that the differences were observed in the susceptibilities of 4 C. medinalis populations against insecticides, and the susceptibility of C. medinalis against a same insecticide differed with 1-4 folds among 4 populations. Among the four detected insecticides (chlorpyrifos, chlorantraniliprole, emamectin benzoate and spinosad), NN and HZ populations had higher susceptibility against chlorpyrifos than HP and CS populations, NN population had the lowest susceptibility against chlorantraniliprole, HP population had the highest susceptibility against emamectin benzoate, CS population had the lowest susceptibility against spinosad. Results indicated that C. medinalis had the geographic differences on the detoxified enzymatic activity and insecticidal susceptibilities, the differences of geographic populations would be considered into the formulation of the tactics on the C. medinalis control.

Key words: Cnaphalocrocis medinalis, difference on population, detoxified enzyme, susceptibility, insecticide

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