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粉剂是农药的原药加入填补料,经过加工磨碎制成的粉状混合物。粉剂药粒直径在100微米以下,一般不能用来喷雾。因为绝大部分原药都不溶于水(敌百虫、磷胺除外),加上粉剂中的填补料又主要是陶土、高陵上、滑石粉等,既不溶于水,也难在水中悬浮,如果用于喷雾,就会在药液中出现沉淀,使喷雾器的喷枪、喷嘴阻塞,还会造成作物药害。
Powder is the original pesticide added to fill material, after processing the powder made of pulverized mixture. Dust particles below 100 microns in diameter, the general can not be used to spray. Because most of the original drug are not soluble in water (trichlorfon, except for phosphorus amines), together with the filler in the powder and the main clay, Gaoling, talc, etc., neither soluble in water, it is difficult to suspend in water, If used for spraying, it will precipitate in the liquid medicine, causing the sprayer’s spray gun and nozzle to clog, and will also cause crop injury.