The efficacy of a new water-based formulation containing 30% permethrin and 30% piperonyl butoxide against laboratory and field populations of Aedes albopictus was evaluated in the laboratory, in semifield experiments, and in residential communities in St. Augustine, FL. In laboratory bottle bioassay, 3 doses (3.18 g/ml, 2.26 g/ml, and 1.59 g/ml) of the permethrin product resulted in 100% mortality of adult mosquitoes in 1 h. In semifield experiments, the insecticide sprayed by the water-based thermal fogger at 381.5 ml/min application rate caused 99% mortality of caged mosquitoes. At 24 h posttreatment in the residential communities, there was 79% and 83% reduction of the natural population (numbers) of adult Ae. albopictus and all adult mosquito species collected in BioGent (BG) sentinel traps baited with a BG lure in the 3 test sites, respectively. There was also a 79% reduction in the number of Ae. albopictus eggs collected in ovitrap used in the treated sites. The reductions were significant for adult Ae. albopictus and all mosquito species at 1 wk posttreatment, but no significant reduction was observed at 2–3 wk posttreatment. These findings demonstrate the effectiveness of the new water-based permethrin product against Ae. albopictus populations in residential communities.
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1 March 2013
Evaluation of a New Formulation of Permethrin Applied by Water-Based Thermal Fogger Against Aedes albopictus in Residential Communities in St. Augustine, Florida
Temitope O. Alimi,
Whitney A. Qualls,
Deborah D. Roque,
Diana P. Naranjo,
Dayana M. Samson,
John C. Beier,
Rui-De Xue
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Aedes albopictus
BG-Sentinel traps
water-based permethrin
water-based thermal fogger