Aerial delivery systems were evaluated for season-long control of sweetpotato whitefly (SPW), Bemisia tabaci in cotton near Maricopa, AZ in 1993. Application treatments included rotary atomizers, winglets, trumpet nozzles, and CP nozzles. No single application treatment produced consistently higher nymphal mortality either at the mid-canopy or the top-canopy height. The trumpet nozzle caused the lowest percentage mortality of small and large nymphs at the mid- and top-canopy heights. Regardless of application hardware, Danitol and Orthene applied at 0.20 and 0.50 lb active ingredient per acre, respectively, using a spray rate of 5 gallons per acre, significantly improved control of SPW in cotton when compared with a grower's standard.