松赤枯病、杉落针病、松落针病是我省主要森林病害,轻者影响林木生长,重者引起林木死亡。据不完全统计,危害面积达9万多亩,并逐渐扩大,如独山林场、龙里林场正向几十万亩飞播造林区蔓延。在毛主席革命路线的指引下,在黔南州林业局等有关单位大力支持下,我所科技人员用毛主席的哲学思想指导科学试验,在十几个县15个林场,约5万亩的林地上进行防治试验,证明以六六六为主要成分的“621”杀虫烟剂防治松赤枯病效果好,对防治松、杉落针病也有一定效果。同时通过对松赤枯病菌孢子萌发、菌 Pine red blight, fir needle drop disease, needle drop needle disease is the main forest disease in our province, the light affect the growth of trees, heavy trees cause death. According to incomplete statistics, the damage area amounts to more than 90,000 mu and is gradually expanding. For instance, Dushan Forest Farm and Longli Forestry Farm are spreading to several hundred thousand mu of aerial sowing afforestation areas. Under the guidance of Chairman Mao’s revolutionary line and with the strong support of Qiannan Prefecture Forestry Bureau and other relevant units, our scientific and technical personnel have guided the scientific experiments with Chairman Mao’s philosophical thinking. In a dozen of the 15 forest farms, about 50,000 mu Woodland on the prevention and control test, to prove that 666 as the main component of the “621” insecticide and tobacco control pine blight good effect, prevention and treatment of pine, fir needle disease also have some effect. At the same time through the pine spore germination germs, bacteria