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菌核病为菜心一般性病害,主要分布在老菜区,南方露地生产零星发病,北方多在保护地内发生。一般病情较轻,对生产无明显影响,个别地块或少数棚室发病严重,造成局部死苗或烂棵,在一定程度上影响产量。一、症状识别在菜心各生育期都发生,以早春生产季节发病重。病菌多由茎基或叶柄基部开始侵染。初期病部呈浅灰色至浅灰褐色水浸状,以后形成不规则腐烂斑,逐渐扩展使叶柄和茎
Sclerotinia cabbage as a general disease, mainly in the old vegetable area, sporadic production in the southern sporadic occurrence, the north occurred in the protected area. Generally mild, no significant impact on production, individual parcels or a small number of greenhouses serious illness, resulting in local dead seedlings or rotten trees, to a certain extent, affect the yield. First, the symptoms identified in the cabbage heart of all growth stages occur, the incidence of early spring season heavy. Pathogens and petioles or more from the base of the beginning of infection. Early lesions were light gray to light gray brown flooding, after the formation of irregular rotten spots, and gradually extended to petiole and stem