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大白菜软腐病的主要症状为:在田间发病一般从包心期开始,初发病时,植株外围叶片在晴天中午呈萎蔫状,早晚尚可恢复,持续几天后,外围叶片难以恢复而瘫倒,从而露出叶球。叶片上从伤口开始发病,初呈水浸状,后病部逐渐扩大,表皮下陷呈褐色。发病后期,植株叶球小,腐烂部位全部受害,病部充满黄色粘稠物,有硫化氢臭味,若在干燥、晴暖环境条件下,病部可失水干枯成纸状。
The main symptoms of Chinese cabbage soft rot disease are as follows: The onset of disease in the field usually starts from the period of pericentropy. When the initial disease occurs, the peripheral leaves of the plant are wilted at noon on a sunny day, and can be recovered sooner or later. After a few days, the peripheral leaves are hard to recover and paralyzed Pour, revealing leaf ball. The leaves began to develop from the wound, was initially immersed in water, after the gradual expansion of disease, epidermal subsidence was brown. Late onset, the plant leaves small, rotten parts of all victims, the Department is full of yellow viscous material, hydrogen sulfide odor, if dry, sunny environment, the disease may dehydration dry into a paper-like.