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手机尾号为7119的用户问:大棚甜椒茎部腐烂死亡怎么回事?专家解答:经诊断为茎基腐病。该病是由半知菌立枯丝核菌引起的,主要危害植株的茎基部或地下主、侧根,开始发病时病部呈暗褐色,逐渐绕茎基或根茎扩展,最后导致皮层腐烂,地上部叶片变黄,由下而上逐渐枯死,病部表面产生蛛丝状菌丝,后期有时还能产生黑褐色的菌核。病菌以菌丝或菌核在土壤中或病残体内越冬,在田间主要靠灌溉水、农具以及带菌的粪肥传播,种子带菌也可引起发病。病菌在适宜的环境条件下,直接侵入危害。苗床温暖潮湿,通风不畅,幼苗徒长,
Cell phone tail number 7119 users Q: Greenhouse bell stem rot decay how? Experts answer: The diagnosis of stem rot. The disease is caused by the half-known bacteria Rhizoctonia solani, the main harm to plant stem base or underground main and lateral roots, the onset of the disease was dark brown, and gradually around the stem base or rhizome expansion, and finally lead to cortical decay, the ground Department leaves turn yellow, gradually wither from the bottom up, the disease surface spider filamentous mycelium, late sometimes can produce dark brown sclerotia. Pathogens to mycelium or sclerotia in the soil or sick in winter, mainly in the field by irrigation water, farm tools and contaminated manure spread, seed carriers can also cause disease. Germs in the appropriate environmental conditions, the direct invasion of hazards. Seedbed warm and humid, poor ventilation, elongated seedlings,