뇌염모기 (Culex tritaeniorhynchus)의 구제에 관한 일환으로 초미립자 공중 살포를 다음과 같이 실시하였다. 1. C-47 수송기 장착용 초미립자 살충제 공중 살포기(Fuselage-mounted spray system)를 C-46에 장착하였다. 2. 시속 150 mile로 147.5cc(5온스)/acre의 malathion원액을 15.8$ extrm{km}^2$(6mi$^2$)의 지역을 살포 완료하였다. 3. 노출 지역에 놓았던 성충과 유충의 치사율은 100%였으나 풀숲 속에 놓았던 성충은 72.5%였다. 4. 다이카아드(oil red dye card)에 낙하된 살충제의 입자 수는 9.7 droplet/inch$^2$였다.
Small scale of ULV application for mosquito control of Japanese Encephalitis was carried out at Sasang area (6 miles$^2$) of Pusan city in August 1971. Fuselage. mounted spray system was fixed to C-46 ROK Air forces Air craft with modified from that was originally made for C-47. Air craft was flown at speed of 150 MPH(241km./hr.), at a height of about 200 feet(61.3m.) and a swath spacing of 600 feet (182.6m.). Twenty one minutes were spent to actual application of insectiside, although the air-craft had flown for 75 minutes from taking off to landing. Bio-assays with caged adults and larvae of C. tritaeniorhynchus summorosus were made at selected sport within test area. In addition droplet collection on red dye cards were made, and the average number of droplet were 9.7 per inch. Results of Bio-assay test were shown 100% mortality of mosquitos exposed at open sites and 72.5% at protected sites(grasses, vegetations and buildings.).
