植物防病膜剂“京2 B”系由中国农业科学院农业气象室研制的高分子有机成膜化合物,喷布于植物体表,很快形成一层白眼几乎看不见的均匀薄膜。它无毒无害能透光,不影响气孔开张和光合作用进行,植株亦能正常生长发育;“京2B”膜层能隔氧疏水,改变植株表面的微气象状况,使水气热条? Phytosanitary agent “Beijing 2 B” is a polymer organic film-forming compound developed by the Agricultural Meteorological Office of the Chinese Academy of Agricultural Sciences. It is sprayed on the plant surface to form an even thin film with almost invisible white eyes. Its non-toxic and harmless to light, does not affect the stomatal opening and photosynthesis, the plants can also grow normally; “Beijing 2B” membrane can oxygen percolation, changing the micro-weather conditions on the surface of the plant so that hot water vapor?