Abstract Ectiban 5.7% EC was applied undiluted as an aerosol concentrate by electric mist fogger (Challenger Fogmaster, AFA Corp. Miami, Fla) to interior surfaces of two ca. 50 by 500 to 600 ft chicken breeder houses. The fogger was hand held to direct the EC-droplet air blast in a swath across posts, roosting platforms, nest boxes, walls and ceilings, providing both a residual surface treatment and an aerosol fogging. Both houses were treated twice at 14- day intervals; one-half of 1 house that was divided in two sections was a non-treated check for the first treatment. The effect of treatment on bed bug populations was assessed by (1) counting numbers of bed bugs in natural harborages before and after treatment; (2) assessing mortality in sentinel bed bugs exposed to aerosol vapor in vials screened at one end and set out in each house; and (3) bioassay of bed bugs against plywood surfaces that received treatment in breeder houses.