白菜白锈病普遍发生于十字花科蔬菜产区,在我国主要严重发生在东北、长江流域和云南一带,病株率一般在15%左右,流行时可达50%以上,严重影响白菜的产量和质量。发病原因:引起白菜白锈病的病原有鞭毛菌亚门卵菌纲真菌白锈菌和大孢白锈菌两种,白锈菌菌丝无分隔,蔓延于寄主细胞间隙。顶端着生链状孢子囊的孢子囊梗短棍棒状,无色的孢子囊卵形至球形,萌发时可产生5~18个双鞭毛游动孢子。大孢白锈菌孢子囊和卵孢子较白锈菌均较大,褐色、近球形的卵孢 White cabbage white rust commonly occurs in the cruciferous vegetable producing areas. In our country, the main serious rust occurs in the northeast, the Yangtze River valley and Yunnan. The diseased plant rate is generally about 15% and the prevalence can reach over 50%, which seriously affects the yield and quality. Cause of the disease: white cabbage caused by pathogen pathogens Flammulina subfamily fungus white fungus and white fungus two white rust fungus mycelium without separation, spread in the host cell gap. Top of the sporangia spore sac spore short clubs stick, colorless sporocyst oval to spherical, germination can produce 5 to 18 pairs of flagellum zoospores. Spore vesicle and spore of Magnaporthe grisea than that of white rust fungus were larger, brown, nearly spherical oospores