Aerial tests of a sand formulation of methoprene indicate that a rate of 0.015 Ib AI/acre is required for 95% control of field populations of Aedes taeniorhynchus (Wied.) Desired gross application rates were either 5 or 7.5 Ib/acre, but in practice there was considerable variation due to the inability of the aircraft distribution equipment to apply uniformly the desired small amount of material.