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Chinese Journal of Applied Ecology ›› 2020, Vol. 31 ›› Issue (10): 3282-3288.doi: 10.13287/j.1001-9332.202010.034

• Special Features of Plant Protection • Previous Articles     Next Articles

Cross-resistance and the underlying mechanisms of clothianidin resistant population of Frankliniella occidentalis to insecticides

YAN Gai-lan1, WANG Sheng-yin2*   

  1. 1Xi-Xian New District Administration for Market Regulation, Xi'an 710086, China;
    2College of Agriculture and Food Science, Zhejiang A&F University, Hangzhou 311300, China
  • Received:2020-01-13 Accepted:2020-07-17 Online:2020-10-15 Published:2021-04-15
  • Contact: * E-mail: wsy19840822@163.com
  • Supported by:
    Open Fund Project of the Key Laboratory of Comprehensive Harmful Pest Management of the Northwest Loess Plateau of the Ministry of Agriculture, China (KFJJ20180109).

Abstract: Clothianidin, belonging to neonicotinoid insecticide with systemic and contact mechanisms, is used to control the invasive pest Frankliniella occidentalis. To identify the resistance risk, we examined the cross-resistance to multiple insecticides and mechanisms of clothianidin resistant population of F. occidentalis. The results showed that F. occidentalis developed a high level of resis-tance to clothianidin (56.8-fold) after selecting for 45 generations. The resistant population of F. occidentalis had medium level of cross-resistance to thiamethoxam, imidacloprid, chlorpyrifos, cyhalothrin and emamectin benzoate (18.6>RR50>11.3), and the low level of cross-resistance to phoxim and methomyl, but no cross-resistance to chlorfenapyr and spinosad. The synergists piperonyl butoxide (PBO) and triphenyl phosphate (TPP) had significant synergistic effects on clothianidin in killing the resistant population (CL), Yunnan wild population (YN) and susceptible population (S). Compared with the sensitive population, the CL populations had significantly increased activities of mixed-functional oxidases P450(3.6-fold), b5(2.9-fold) and O-demethylase (4.9-fold), and carboxylesterase (2.5-fold), with no significant difference in the activities of glutathione S-transferases among CL and S populations. The results highlight the role of increasing mixed-functional oxidases and carboxylesterase in the resistance of F. occidentalis to clothianidin.

Key words: Frankliniella occidentalis, clothianidin, spinosad, cross-resistance, resistance mechanism