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1985年6月15—17日北京农业大学研究院和河北省长城化工厂联合在重庆中国农科院柑桔研究所召开了“无毒高脂膜防病增产及综合利用经验交流会”。来自全国10个省(市)的34个生产、科研、教
June 1985 June 15-17, Beijing Agricultural University Institute and the Great Wall Chemical Plant in Hebei Province jointly held in Chongqing Institute of Citrus Chinese Academy of Agricultural Sciences held a “non-toxic high-fat film disease prevention and yield increase and comprehensive utilization of experience exchange.” From the 10 provinces (cities) of the 34 production, research, teaching