湖南靖县排牙山林场的杉木嫁接种子园,曾发生过较严重的病虫害(见全国林木良种选育科技协作会议交流材料《杉木嫁接种子园病虫害初步调查》)。1976年8月中旬调查后,立即煮制松碱合剂防治龟蜡蚧、用烧碱2份、松香3份、水16份,将水煮沸后,加入烧碱,待溶 Hunan Jingxian Pai Yashan Forestry Center of the grafted fir seed orchard, there have been more serious pests and diseases (see National Forestry Breeding and Breeding Science and Technology Symposium meeting materials “fir grafted seed orchard of pests and diseases preliminary investigation”). In mid-August 1976 after the investigation, immediately cooked pine softwood mixture control turtle scale, with 2 parts of caustic soda, 3 parts of rosin, 16 parts of water, the water after boiling, adding caustic soda to be dissolved