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杀菌剂是专门用来防治植物病害的一类农药。它可以抑制或杀死危害植物的病原菌,一般对害虫无效。目前使用的杀菌剂一般都属于低毒或中等毒性的农药,对人畜比较安全,但使用中若不慎重,也会引起中毒事故。使用杀菌剂必须掌握杀菌剂的防治对象。杀菌剂的种类很多,但都有各自的有效防治对象,没有一种杀菌剂是包治百病的。例如瑞毒霉对鞭毛菌亚门真菌病害,如黄瓜、葡萄、白菜、啤酒花的霜霉病,谷子白发病,蔬菜晚疫病等特别有效,但对其它真菌病害,如小麦、瓜类白粉病,小麦锈病等却无效。
Fungicide is a class of pesticides that are used exclusively to control plant diseases. It can inhibit or kill pathogenic bacteria that endanger plants and are generally ineffective against pests. Currently used fungicides are generally low or moderate toxicity of pesticides, more safe for humans and animals, but if not careful use, can also cause poisoning. The use of fungicides must control the fungicide. Many types of fungicides, but have their own effective prevention and treatment, none of the bactericide is a cure. For example, Ruixi mold is particularly effective against Flammulina fungi diseases such as cucumber, grape, cabbage, hoppy mildew, millet white disease and late blight of vegetables, but is particularly effective against other fungal diseases such as wheat, melon powdery mildew, Wheat rust is invalid.