飞机喷药治虫是农业机械化的内容之一。我国飞机治虫,最初以喷粉为主,后来逐渐改为喷雾。一架“运五型”飞机一般能装两千斤药液,约可治虫三百亩,一天最多防治七、八千亩。 为了提高功效,曾设想在药剂里少加水,使每亩喷洒量由6—8市斤降低到1—2市斤,则每架次防治面积可扩大到一、二千亩,这就叫做飞机低容量喷雾。但低容量喷雾药液里还要加水,而且在雾滴降落过程中,由于水份挥发使雾滴变小,容易随风飘移而降落到目的地以外,甚至长时间悬浮空中不能降落,以致影响防治效果。其实,治虫所需的有效剂量是很少的,如果直接喷洒原药,每亩地只要喷几十克到一、二百克就够了, Aircraft spraying pest control is one of the elements of agricultural mechanization. China’s aircraft worm, initially dominated by dusting, and later gradually changed to spray. A “five-transport” aircraft can generally hold two thousand kilograms of liquid, about three hundred acres of pest control, a day up to prevent seven or eight thousand acres. In order to improve efficacy, it has been envisaged in the pharmaceutical less water, so that the amount of spray per acre from 6-8 jins reduced to 1-2 jins, the control area can be expanded to one or two acres, which is called the aircraft low Capacity spray. However, low-volume spray liquid to add water, but also in the droplet drop process, due to evaporation of water to smaller droplets, easy to wind drift and landing outside the destination, or even suspended in the air for a long time can not be landed, resulting in impact Control effect. In fact, the effective dose of pest control is very small, if the direct spraying of the original drug, just spray a few dozen grams per mu to one or two hundred grams is enough,