我区从一九七七年到一九七八年采用飞机超低容量喷雾进行了土蝗防治,取得了良好的效果。两年来的实践证明,飞机超低容量防虫有五大优点;第一,防治效果好。四十八小时的杀虫率一般可达百分之九十;第二,工效高。一架“运五型”飞机在正常天气下,可防治三～五万亩,比常量喷雾捉高工效四、五倍;第三,不用水。对我区干旱区和山区尤为适宜;第四,飞行费低。防治地块愈大,愈能发挥其优越性,一般节省飞行费70～80%;第五,节省大量的装药运药劳力和费用。根据全国科研协作会议安排,我区于一九七七年进行了 Our area from 1970 to 1978 using the aircraft ultra-low volume spray soil Locust control, and achieved good results. Two years of practice have proved that the aircraft has five advantages of ultra-low-volume pest control; first, prevention and treatment is good. Insecticidal rate for 48 hours is generally up to 90%. Second, high efficiency. A “five-type” aircraft in normal weather, can prevent three to five acres, higher than constant spray to enhance efficiency four or five times; third, without water. Arid and mountainous areas of my area is particularly suitable; Fourth, the flight fee is low. The larger the land for prevention and control, the more it can give play to its superiority, which generally saves 70-80% of the flight cost. Fifthly, it saves a lot of medicine and labor costs for medicine loading. According to the arrangement of the national scientific research collaboration meeting, our district was started in 1977