Impact of Sub-Lethal Exposure to Insecticides on Vector Control Lee Cohnstaedt and Sandra Allan USDA-ARS-CMAVE Triservices Meeting Feburary 2010
Behavioral assays Air+CO2 Attractant Entrance *Treatment level lethal dose25 *Infrared light was used illuminate nocturnally active mosquitoes. *Capillary release attractant *CO2 release 50ml/min
Flight path analysis Untreated Cx. quinquefasciatus Deltamethrin treated Cx. quinquefasciatus
Untreated An. albimanus Flight path analysis Permethrin treated An. albimanus
Flight path analysis Untreated Ae. aegypti Treated Ae. aegypti
Time in flight * *
Heading * *
Implications The sublethal affects of pyrethroids on a mosquito’s ability to detect and locate hosts may increase the efficacy of aerial and residual spraying treatments beyond their immediate killing impact.
Personal protective measures Sleeve Band Phlebotomus papatasi
Number of landings per 20 minutes Landing site
Implications Sand flies predominantly land on the sleeve before moving towards the exposed skin; therefore a lethal insecticidal barrier at the uniform-skin interface will reduce disease transmission.
Acknowledgments Uli Bernier Matt Aubuchon • Adrian Duehl • Erin Vrzal • Nathan Newlon