Insecticides were aerially applied by ULV to each of three 16 sq. mi. areas in Lonoke County. The center of a small town was the locus of the control zone. Insecticides used were naled at 1.0 fl. Oz/acre, and malathion at 3.0 and 1.5 fl. oz/acre. An LV application of fenthion (0.1 Ib ai/acre) was made to 2000 acres surrounding an additional community. The latter treatment was similar to that community. The latter treatment was similar to that most commonly used over Arkansas communities. The mosquitoes in the area were primarily Psorophora columbiae (Dyar & Knab) with some Anopheles quadrimaculatus Say also present. Percentage reduction of the mosquito population was measured by light trap and landing rate. Good control was achieved for about 24 hrs with all ULV treatments except 1.5 oz. malathion. When compared to the standard LV application, the ULV technique produced very similar results. There appeared to be little difference between 3 oz ai/acre malathion and 1.0 oz ai/acre of naled.