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编辑同志: 今年4月上旬,我栽了3,000棵熊岳圆葱春苗,成活率达95％以上。但在圆葱生长后期,发现有的植株叶梢变黄,收获时个别的葱头发生腐烂,直至贮藏过程中,腐烂数量不断增多。经仔细观察,发现腐烂足由里向外扩散的。最初我以为是葱苗带病,但与我同时买葱苗的两户,他们的圆葱均无此病。请问编辑同志,这是一种什么病害?如何防治? 兴城县大寨乡马圈村 陈显杰同志: 根据你介绍的情况,作如下答复。 陈显杰 葱头腐烂是因感染灰霉病和软腐病所引起的,熊岳圆葱具有较强的抗病性,但在栽培管理不当和不良的自然条件下,也能发生灰霉病和软腐病,甚至在其它病害发生之后,也能引起继发性的软腐病。 这两种病害均在圆葱生育后期和收获期发生,病菌由假茎基部侵染,造成病斑,引起植株早衰,圆葱头收获后发生腐烂。发病程度与自然条件
Editorial comrades: In early April this year, I planted 3,000 Xiong Yue spring onion seedlings, survival rate of 95% or more. However, in the later period of onion growth, some plants were found to have yellowish leaves, and some of the onions were decayed during harvest until the amount of decay increased during storage. After careful observation, found that the rot from the inside out. At first I thought it was a scallion seedling disease, but with me at the same time to buy two green onions, their onion are not the disease. What is the disease? How to prevent? Comrade Chen Xianjie, Dazhai Town, Xingcheng County: According to the situation you introduced, make the following reply. Chen Xianjie onion rot is due to infection caused by botrytis cinerea and soft rot, Xiong Yue Onion has a strong resistance, but in the cultivation and management of inappropriate and poor natural conditions, can also occur gray mold and soft rot, Even after other diseases, can also cause secondary soft rot. Both of these diseases occur during the later stages of green onion growth and harvest. Germs are infested by the fake stem base, causing lesions that cause premature plant failure and decay after onions harvest. Incidence and natural conditions