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1、 病状与病原该病主要为害大蒜假茎基部。初发病病部水渍状,以后病斑变暗色或灰白色,溃疡腐烂部位发出强烈的蒜臭味。湿度大时,表面长出白色绵毛状的菌丝,以至病株周围的杂草也布满白色菌丝,并溃疡腐烂。大蒜叶鞘腐烂后,上部叶片表现萎蔫,并逐渐黄化枯死,蒜根须、根盘腐烂,蒜头散瓣。一般在5月上旬以后,病部形成不规则如麻籽大小的黑褐色菌核,该病是由大蒜核盘菌侵染所致。
1, the disease and pathogen The disease is mainly harmful to garlic pseudostem base. Early onset of disease Department of water-like symptoms, after the lesion becomes dark or gray, ulcers rotten parts issued a strong garlic odor. When the humidity is high, the surface grows white fleece-like hyphae, and the weeds around the diseased plants are also covered with white mycelium and ulcerated decay. Garlic leaf sheath decay, the upper leaves showed wilting, and gradually yellow dead, garlic root, root rot, garlic San petal. Usually in early May after the formation of irregular diseased parts of hemp seed size, such as brownish sclerotia, the disease is caused by the infection of garlic Sclerotinia.