玉米灰斑病又称尾孢叶斑病、玉米霉斑病，除侵染玉米外，还可侵染高梁、香茅、须芒草等多种禾本科植物。玉米灰斑病是近年上升很快、为害较严重的病害之一。主要为害叶片。初在叶面上形成无明显边缘的椭圆形至矩圆形灰色至浅褐色病斑，后期变为褐色。病斑多限于平行叶脉之间，大小4～20×2～5(mm)。湿度大时，病斑背面生出灰色霉状物，即病菌分生孢子梗和分生孢子。
玉米灰斑病是严重威胁玉米生产的叶部病害。
The gray leaf spot(GLS) is a significant leaf disease in maize.
对玉米灰斑病在黑龙江省的发生情况进行了调查。
The investigation was done about incidence of gray leaf spot of maize in Heilongjiang province.
玉米灰斑病是凤庆县近年突然暴发流行的一种玉米叶部病害。
Gray leaf spot of maize occurred suddenly in Fengqing County, Yunnan Province in the recent years.
应用推荐