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夏玉米全蚀病是一种对玉米构成严重威胁的土传根病。该病发生面广、扩展快,影响灌浆,轻者减产7.3～8.8％,一般减产18.6～20.6％,重者减产32～35.9％。 一、症状 玉米感病后,病株自抽穗开花期叶片逐渐变黄干枯,重病株根部局部变黑褐色腐烂,根皮呈黑色发亮条斑。根段表现为寄主细胞完全被侵染,组织褐变坏死。根茬变黑似“黑膏药”状,有时黑色条斑从种子根、次生根到气生根,还可延伸到茎基
Summer corn eclogism is a serious threat to corn soil RMR. The disease occurs in a wide range, rapid expansion, affecting the grouting, light output reduction of 7.3 ~ 8.8%, the general reduction of 18.6 ~ 20.6%, heavy output reduction of 32 ~ 35.9%. First, the symptoms of corn susceptible, the diseased plants from the heading stage of flowering leaves gradually turn yellow, seriously ill plant roots dark brown decay, root bark black shiny spots. The root section of the host cell showed complete infection, tissue necrosis. Root stubble black like “black plaster” shape, and sometimes black streak from the seed root, secondary root to air root, but also extends to the stem base