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ARS Home » Southeast Area » Gainesville, Florida » Center for Medical, Agricultural and Veterinary Entomology » Mosquito and Fly Research » Research » Publications at this Location » Publication #330601

Research Project: Biting Arthropod Surveillance and Control

Location: Mosquito and Fly Research

Title: Field evaluation of indoor thermal fog and ultra-low volume applications for control of Aedes aegypti, in Thailand

Author
item Ponlawat, A - Armed Forces Research Institute Of Medical Sciences
item Harwood, J - Department Of Defense
item Putnam, J - Walter Reed Army Institute
item Nitatsukprasert, C - Armed Forces Research Institute Of Medical Sciences
item Pongsiri, A - Armed Forces Research Institute Of Medical Sciences
item Kijchalao, U - Armed Forces Research Institute Of Medical Sciences
item Linthicum, Kenneth - Ken
item Kline, Daniel - Dan
item Clark, Gary - Retired ARS Employee
item Obenauer, Peter - Department Of Defense
item Doud, C - Department Of Defense
item Mccardle, P - Armed Forces Research Institute Of Medical Sciences
item Richardson, A - Department Of Defense
item Szumlas, D - Walter Reed Army Institute
item Richardson, J - Walter Reed Army Institute

Submitted to: Journal of the American Mosquito Control Association
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/1/2016
Publication Date: 6/5/2017
Citation: Ponlawat, A., Harwood, J.F., Putnam, J.L., Nitatsukprasert, C., Pongsiri, A., Kijchalao, U., Linthicum, K., Kline, D.L., Clark, G.G., Obenauer, P.J., Doud, C.W., Mccardle, P.W., Richardson, A.G., Szumlas, D.E., Richardson, J.H. 2017. Field evaluation of indoor thermal fog and ultra-low volume applications for control of Aedes aegypti, in Thailand. Journal of the American Mosquito Control Association. 33(2):116-127.

Interpretive Summary: To improve the ability to control populations of Aedes aegypti mosquitoes inside houses two hand held sprayers and 3 insecticides were evaluated in villages in Central Thailand. One sprayer used thermal fogging technology and the other used Ultra-low Volume (ULV) technology. When an adulticide (containing pyrethrins and piperonylbutoxide as the active ingredients) were mixed with a larvicide (pyriproxyfen) adult mosquito populations were reduced for up to 20 days with both sprayers. Larval stage bioassays indicated that the ULV machine provided more control of immature mosquitoes developing in water.

Technical Abstract: Efficacies of a hand-held thermal fogger (PatriotTM) and hand-held Ultra-low volume (ULV) sprayer (TwisterTM) with combinations of two different adulticides and an insect growth regulator (pyriproxyfen) were field assessed and compared for their impact on reducing dengue vector populations in Thailand. The effectiveness of the space sprays was evaluated by sampling the natural Ae. aegypti population in houses and determining their physiological status, by monitoring mortality of sentinel caged mosquitoes and by assessing larval mortality in laboratory bioassays using water exposed to the spray. The total of 14,584 Ae. aegypti were collected from BGS sentinel traps in this study. Results showed the combination of ULD® BP-300 (3% pyrethrin) and pyriproxyfen sprayed either by the Patriot or Twister significantly reduced Ae. aegypti populations up to 20 days post spray relative to the control clusters. The addition of pyriproxyfen to the adulticide significantly influenced the duration to suppress mosquito populations. The thermal fogger resulted in higher mortality in caged mosquitoes than the ULV. However, neither machine was able to achieve high mortality Ae. aegypti placed in hidden cages. The larval bioassay results demonstrated that the ULV machine provided better adult emergence inhibition than the thermal fogger.