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小麦全蚀病是一种毁灭性病害,是我省植物检疫对象之一。此病是一种典型的根病,病菌侵染的部位只限於根部及茎基部1—2节处。种子传播是由于病残体残屑夹杂于种子间而引起。感病植株较矮,分蘖减少,茎部叶片变黄,初生根和根茎呈灰黑色,重病株的次生根也局部变黑。返青拔节期显现的症状,是返青迟缓,黄叶增多,拔节期叶片自上而下发黄,重病株的初生根和次生根大部变黑。在抽穗、灌浆期病株出现“白穗”,茎基部1—2节形成明显的“黑膏药”或“黑脚”。病株一般容易拔起,但不易倒伏。
Total eclipse of wheat disease is a devastating disease, is one of the objects of plant quarantine in our province. The disease is a typical root disease, the site of infection of bacteria is limited to the root and stem base 1-2 Department. Seeds are transmitted due to the presence of the debris of the diseased body in the seeds. Sick plants are shorter, tillers are reduced, the stem leaves turn yellow, primary roots and rhizomes are grayish black, and secondary roots of severely diseased plants are also partially blacked. The symptom of appearing at jointing stage of rejuvenation is retarded retreat, increase of yellow leaves, yellowing of top-down leaves at jointing stage, blackening of primary root and secondary root of seriously ill plant. At heading and filling stage, the diseased plants appeared “white spike”, and the 1-2 bases of stem base formed obvious “black plaster” or “black foot”. Strain generally easy to pull up, but not easy to lodging.