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Impact of Sub-Lethal Exposure to Insecticides on Vector Control

Impact of Sub-Lethal Exposure to Insecticides on Vector Control. Lee Cohnstaedt and Sandra Allan USDA-ARS-CMAVE Triservices Meeting Feburary 2010. Insecticide contact. Pyrethroids. If not dead, then what?. Mosquito species. Behavioral assays. Air+CO 2. Attractant. Entrance.

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Impact of Sub-Lethal Exposure to Insecticides on Vector Control

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  1. Impact of Sub-Lethal Exposure to Insecticides on Vector Control Lee Cohnstaedt and Sandra Allan USDA-ARS-CMAVE Triservices Meeting Feburary 2010

  2. Insecticide contact

  3. Pyrethroids

  4. If not dead, then what?

  5. Mosquito species

  6. 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

  7. Flight path analysis Untreated Cx. quinquefasciatus Deltamethrin treated Cx. quinquefasciatus

  8. Untreated An. albimanus Flight path analysis Permethrin treated An. albimanus

  9. Flight path analysis Untreated Ae. aegypti Treated Ae. aegypti

  10. Average flight velocity * *

  11. Time in flight * *

  12. Heading * *

  13. Blood feeding *

  14. 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.

  15. Personal protective measures Sleeve Band Phlebotomus papatasi

  16. Number of landings per 20 minutes Landing site

  17. Sleeve Band

  18. 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.

  19. Acknowledgments Uli Bernier Matt Aubuchon • Adrian Duehl • Erin Vrzal • Nathan Newlon

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