甘蓝、花椰菜、大葱等蔬菜,叶面上有一层白粉状蜡质,这对减少蒸发、提高抗旱能力有重要作用。但在防治病虫害时却给喷药带来困难,常使药液呈水珠状,不能湿润植物表面而流失。如果在药液中加入湿润剂(即展着剂、粘着剂),就可解决这一问题。常用的湿润剂有纸浆废液、皂角、大豆粉及洗衣粉等。 Cabbage, broccoli, green onions and other vegetables, a layer of white waxy leaf surface, which reduce evaporation and improve drought tolerance has an important role. However, in the control of pests and diseases spray to bring difficulties, often make the liquid was bead-like, can not be wetted plant surface and lost. If the solution was added humectant (ie, spreading agent, adhesive), you can solve this problem. Commonly used wetting agent pulp waste, saponins, soy flour and washing powder.