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识别要点胡萝卜灰霉病主要在贮藏期间为害肉质根,以贮藏的中后期发生最多,起初感病的组织呈水渍状、浅褐色,后病部表面密生灰色霉状物,有的呈灰黑色,后逐渐烂腐,病组织干缩呈海绵状。发生规律病源为灰葡萄孢真菌性病害,病菌以菌丝体和菌核随病株残体在菜窖里或土壤中越冬,引起初侵染,分生孢子借气流传播进行再侵染,发病适温20℃。贮藏期间低温、潮湿条件下易发病,造成机械损伤的更易扩展。
Recognition points Botrytis cinerea mainly during storage harmful flesh root, to the storage of the most occurred in the late, initially infected tissue was water-like, light brown, after the Ministry of disease surface gray mold gray matter, and some gray-black , Gradually rotten rot, tissue shrinkage was sponge-like. Occurrence of the regular source of Botrytis cinerea fungal disease, the bacteria to mycelium and sclerotia with diseased plant residues in the cellar or soil overwinter, causing the initial infection, conidia re-infection by airborne transmission, the incidence Suitable temperature 20 ℃. Low temperature during storage, easy to disease under humid conditions, resulting in mechanical damage easier to expand.