Field experiments were conducted during 1981 and 1982 to evaluate the effectiveness of ultra low volume (ULV) aerial applications of naled (Dibrom 14) against natural populations of Culicoides biting midges, mosquitoes and tabanids in Parris Island, SC. Effectiveness of the applications was measured by trapping natural populations of all 3 groups of insects and by bioassays with caged mosquitoes and biting midges. The first test (1981) consisted of 2 applications of a 1:5 mixture of Dibrom 14 in heavy aromatic naphtha (HAN) at a rate of 1.5 oz/acre (0.25oz/acre Dibrom 14) on the same day spaced ca. 20 min apart. A very low reduction (24%) in the biting midge population following this treatment indicated that the dose of active ingredient (0.5 oz/acre) was inadequate under the prevailing weather conditions, which included marginally high winds. The second test (1982) consisted of 2 applications of undiluted Dibrom 14 at a rate of 1.0 oz/acre each on 2 consecutive days. Results of this test showed that the larger dose of undiluted Dibrom 14 (2 oz/acre total) provided excellent control (99%) of biting midges, as well as mosquitoes and tabanids, for 3 days after the treatments.