1988—1990年在福建漳浦县设点进行灭幼脲Ⅲ号防治马尾松毛虫试验。结果表明:灭幼脲Ⅲ号防治马尾松毛虫效果好,用药量少,对天敌杀伤作用小,对松毛虫成虫羽化、产卵量均有抑制作用;但触杀效果不佳、药效较慢。在闽南地区防治3—4龄马尾松毛虫,浓度以1250倍～2500倍为宜;防治越冬代幼虫,施药时间最好在11月份以前。 1988-1990 in Zhangpu County, Fujian Province, set off points for meflorazin III control Masson Dendrolimus test. The results showed that the effect of mefivluate Ⅲ on controlling Dendrolimus punctatus was good, its dosage was low, its killing effect on the natural enemies was small, and the adults of Dendrolimus punctatus fecundity and fecundity were inhibited. But the contact effect was not good and its efficacy was slow. In Minnan area 3-4 age-dependent Dendrolimus punctatus, the concentration of 1250 times to 2500 times is appropriate; control overwinter larvae, spraying time is best in November before.