The "poinsettia strain" of the sweetpotato whitefly, Bemisia tabaci (Gennadius) has developed into a major economic pest on numerous vegetable crops as well as cotton. Media coverage has created a public awareness and the necessity for both short- and long-term control measures. In greenhouse trials conducted on poinsettia and field trials conducted on both tomato and cotton, binary mixtures of fenpropathrin and acephate at rates ranging from 0.1 - 0.2 plus 0.5 - 1.0 lb. ai/A have demonstrated excellent activity against multiple life stages of the "poinsettia strain" of sweetpotato whitefly.