Skip to main content
AMCA24 Main banner
Icon Legend
This session is not in your schedule.
This session is in your schedule. Click again to remove it.
Back

Adult Control III

Adult Control III

Session: Adult Control III

254 - Statewide examination of insecticide resistance and mechanisms in Florida Culex quinquefasciatus

Thursday, March 7, 2024
2:35pm – 2:45pm  
Location: D2
Abstract: Culex quinquefasciatus serves as a primary vector of West Nile virus and St. Louis encephalitis viruses in Florida. Only limited insecticide resistance testing of Florida Cx. quinquefasciatus populations has been previously performed; therefore, we undertook a comprehensive, statewide evaluation of pyrethroid and organophosphate phenotypic insecticide resistance and the potential mechanisms responsible. We found that all Florida Cx. quinquefasciatus populations tested were resistant to pyrethroids but varied in susceptibility to organophosphates. While the L1014F conversion and kdr-associated resistance was identified in many Florida Cx. quinquefasciatus, detoxification enzyme-based resistance primarily mediated by beta-esterases appeared to play a more important role in the phenotypic resistance we observed in CDC bottle bioassays.