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飞机喷洒药液防治森林害虫,现在较多使用的是常量喷洒。实际上,低容量喷洒经济效益十分显著。常量最大喷洒面积一般为每架次400亩,而低容量每架次至少为1200亩。85年与86年我市用这两种方式防治马尾松毛虫,事实证明,在防治面积基本相同的情况下,低容量喷洒比常量喷洒可提高工效2倍,节省飞行作业时间近2/3。而用这两种喷洒方式,灭虫率二年试验均达到95％以上。为便于比较常量与低容量喷洒的经济效益,下面试就我市两年飞防时采用的常量和低
Aircraft spraying pesticides to prevent forest pests, and now more constant use is the spray. In fact, low-volume spraying is very cost-effective. The maximum constant spray area is generally 400 acres per order, while the low capacity of at least 1200 acres for each sort. 85 years and 86 years, the city of these two ways to control Dendrolimus punctatus, facts have proved that the control area is basically the same circumstances, the low-volume spraying than constant spraying can improve work efficiency 2 times, save flight time nearly 2/3. With these two spraying methods, pest control rate of two years tests have reached more than 95%. In order to compare the economic benefits of constant and low-volume spraying, the following test on the city two years when flying constant and low