Ten commercial household permethrin products in aerosol formulations were evaluated for knockdown (KD) and mortality of female Culex quinquefasciatus. The permethrin concentrations of these products ranged from 0.05% to 0.50%. Eight of the 10 products produced significant KD (%) and mortality (%) posttreatment. At 15 min posttreatment, 3 household permethrin products provided 100% mortality. At 60 min posttreatment, 8 products provided 100% mortality. At 120 min, only 2 products resulted in less than 100% mortality with permethrin concentrations of 0.05% and 0.10%. A linear regression analysis shows a significant relationship between the mortality and times posttreatment.
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