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贵州省林业科学研究所,在毛主席革命路线指引下,针对该省大面积松、杉林木遭受赤枯病、落针病严重为害的情况,在有关部门的配合下大力开展科学实验,获得了用(621)杀虫烟剂防治松、杉赤枯病、落针病的良好效果。该所图云关试验林场在1965年用(621)杀虫烟剂防治马尾松赤枯病140亩,1966年防治455亩。经放烟防治的松林,针叶浓郁翠绿,被害率、感病指数大为降低;反之,未放烟的
Under the guidance of Chairman Mao’s revolutionary line, Guizhou Academy of Forestry Science and Technology has vigorously carried out scientific experiments with the cooperation of relevant departments under the guidance of Chairman Mao’s revolutionary line and against the large area of pine and cedar forest suffering from the disease of blight and needle drop disease. With (621) insecticide and tobacco control pine, red wilt, needle drop disease good effect. The map cloud test forest farm in 1965 with (621) pesticides and tobacco control of 140 acres of Masson’s pine blight, control of 455 acres in 1966. The pine forest with loose smoke control and rich coniferous green leaves have greatly reduced the victimization rate and susceptibility index. On the contrary,