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Chinese Journal of Biological Control ›› 2022, Vol. 38 ›› Issue (1): 215-221.DOI: 10.16409/j.cnki.2095-039x.2021.05.021

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Repellency of Two Volatile Pyrethroids to Aedes

ZHOU Qiaoling1, XU Zhanyi1, YAN Ru1, ZHU Guonian1, CHEN Mengli2   

  1. 1. Institute of Pesticide and Environmental Toxicology, Zhejiang University, Hangzhou 310058, China;
    2. College of Agricultural and Food Science, Zhejiang A&F University, Hangzhou 311300, China
  • Received:2021-02-05 Online:2022-02-08 Published:2022-03-01

Abstract: Pyrethroids, with both insecticidal and repellent activities, have been widely used in mosquito coils and other mosquito-repellent products. However, the repellent mechanism of pyrethroid remains unknown. In this study, two volatile pyrethroids, dimefluthrin and meperfluthrin, induced spatial (non-contact) repellency in Aedes aegypti and Aedes albopictus in a hand-in-cage assay. Electroantennography (EAG) recordings showed that, except dimefluthrin, other pyrethroids did not elicit EAG responses from adult antennae. Furthermore, the repellency of dimefluthrin and meperfluthrin was weaker against pyrethroid-resistant population of Aedes aegypti (Puerto Rican) carrying kdr mutations on sodium channels than against the susceptible population. Our results suggest that activation of olfactory system is not responsible for pyrethroid repellency in mosquitoes, maybe other factors, such as sodium channels, contribute to pyrethroid repellency.

Key words: Aedes aegypti, Aedes albopictus, pyrethroids, repellency, EAG

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