油菜白锈病,又名龙头病、龙头拐,是一种由病株残体、带病种子传播的真菌性病害,冬油菜区发生普遍,以云贵高原、青海、上海和江浙等地区发病严重,流行年份发病率10%～50%,产量损失5%～20%,含油量降低1.0%～3.29%。除油菜外,还可危害白菜、萝卜、芥菜、甘蓝等十字花科蔬菜。叶、茎、角果均可受害,常与油菜霜霉病并发在同一花轴上。 Rape white rust, also known as the leading disease, faucet Shui, is a disease caused by the residual disease, the spread of the disease of fungal diseases, common occurrence in winter rapeseed areas, Yunnan-Guizhou Plateau, Qinghai, Shanghai and Jiangsu and Zhejiang and other areas of serious illness, Pop the annual incidence of 10% to 50%, yield loss of 5% to 20%, oil content decreased by 1.0% to 3.29%. In addition to rapeseed, but also endanger cabbage, radish, mustard, cabbage and other cruciferous vegetables. Leaves, stems, angle fruit can suffer, often associated with rape downy mildew in the same flower axis.