多年来霜霉病、灰霉病已成为保护地蔬菜疑难病害 ,对于这些病害通常采用药液喷洒方法 ,虽然有一定防治效果 ,但存在因用水量大而增加棚内湿度等生产中疑难问题 ,为病害的发生流行提供了适宜的环境条件。粉尘法施药不仅提高防效、降低棚内湿度、增产、增值 ,而且省工省力 ,并在 Over the years downy mildew, botrytis cinerea has become a protective vegetable difficult diseases, for these diseases are usually used spray method, although there is a certain control effect, but there is a large amount of water because of increased humidity and other greenhouse production problems, The prevalence of disease provides the appropriate environmental conditions. Dust law not only improve pesticide application efficiency, reduce shed humidity, increase production, value-added, and labor-saving and labor-saving