玉米纹枯病(Rhizoctonia solani Kühn)是近几年来本地区玉米上新发生的一种重要病害,重病田发病株率高达90％以上。目前国内尚未见系统报道。1988年以来,作者对玉米纹枯病侵染循环进行了初步研究,主要结果简报如下: 1.玉米种子可带菌,但不能引起玉米植株发病。选择发病的果穗,剥下玉米籽粒,采用浸泡、离心、镜检方法,可镜检到玉米纹枯病的菌丝。但是将上年收集晒干的病玉米籽粒,播种到从未种过玉米的田间,观察 Rhizoctonia solani Kühn is an important new disease in maize in this area. The incidence rate of severe malaria is more than 90%. At present there is no systematic report. Since 1988, the authors conducted a preliminary study on the infection cycle of corn sheath blight. The main results are summarized as follows: 1. Corn seeds can carry bacteria, but can not cause corn plants. Select the incidence of ear, peel corn seeds, using immersion, centrifugation, microscopic examination, microscopic examination of corn sheath blight mycelium. However, in the previous year, the dried diseased maize kernels were collected and sowed in a field that had never been planted with corn to observe