河南省林业厅技术推广站和信阳地区林业局于一九八五年四月一日至四日,在信阳县南部山区顺利结束了飞机超低容量喷洒灭幼脲(一号和三号)防治马尾松毛虫的试验工作。这次试验,每亩用药量分别为1.5、5、7.5和10克;以食盐、尿素、羧基纤维素为助剂; Henan Province Forestry Department of Technology Promotion Station and Xinyang District Forestry Bureau from April 1 to April 4, 1985, in the southern mountainous Xinyang County, the successful conclusion of the aircraft ultra-low-capacity spraying of mefenapyl (I and III) control Dendrolimus punctatus test work. The test, the dosage per acre were 1.5, 5, 7.5 and 10 grams; with salt, urea, carboxymethyl cellulose as aids;