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中国农业科学院农业气象研究室从1975年开始研制“防病薄膜”—京2B(以下简称京2B),于1980年试制成功。京2B 是一种合成高分子化合物,喷到植物和果实表面后,能形成一层极薄的、肉眼几乎看不见的透光疏水薄膜。如果使用得适当,它不阻塞气孔,不影响植株和果实的正常生长发育。植物体或果实被京2B 覆盖后,已附着在植株表面的病原菌,其生活所需的氧气和水分,被薄膜隔绝了;以后侵染到植物上的病原菌,也因膜的疏水、
Agricultural Meteorology Research Institute of Chinese Academy of Agricultural Sciences from 1975 started the development of “anti-disease film” - Beijing 2B (hereinafter referred to as Beijing 2B), in 1980 trial success. Beijing 2B is a synthetic polymer compound, sprayed onto the surface of plants and fruits to form a very thin layer of the naked eye can hardly see the light-emitting hydrophobic film. If used properly, it does not block stomata and does not affect normal plant and fruit growth. After the plant or fruit is covered by Beijing 2B, the pathogen that has adhered to the surface of the plant is separated from the oxygen and water needed for life by the membrane; afterwards,