白菜霜霉病俗称白霉病、霜叶病等,是全国白菜种植区分布十分普遍的真菌性病害,在整个生育期只要条件适宜,随时可以发病,一般以晚春和早秋发病较多,主要危害白菜叶片造成白菜商品性下降和产量的减少,病害流行时损失率可达到50%以上。 Cabbage downy mildew, commonly known as white mold disease, frostbite disease, is a very common distribution of cabbage fungal disease throughout the growing period as long as the conditions are favorable, ready to disease, generally late spring and early autumn onset more, the main hazard Cabbage leaves cause decreased commerciality and reduced yield of cabbage, when the disease epidemic loss rate of up to 50%.