论文部分内容阅读
鉴于近期气候比较适宜玉米病害发生,北京市植物保护站要求各区、县植保部门要切实做好玉米褐斑病、大斑病、纹枯病等病害的监测与防控工作,延缓病害流行蔓延速度。玉米褐斑病是玉米中后期的主要病害之一,由节壶菌属真菌引发,为害部位包括玉米叶片、叶鞘及茎秆。病斑圆形或椭圆形,先在顶部叶片的尖端发生,最初为浅黄色,逐渐变为黄褐色或深褐色,严重时,病斑融合形成较大的褐色条斑,发病后期病斑表皮破裂,叶细胞组织呈坏死状,
In view of the recent climate is more suitable for maize diseases, Beijing Plant Protection Station requires the district and county plant protection departments to earnestly do a good job monitoring and prevention and control of maize brown spot disease, maculopathula, sheath blight and other diseases, delay the spread of disease epidemic . Maize leaf spot is one of the main diseases in mid and late maize. It is caused by the genus Myceliophthora. The damaged parts include maize leaves, leaf sheaths and stalks. The lesion is round or oval, first occurring at the tip of the top leaf, initially yellowish, gradually turning brown or dark brown, in severe cases the lesions merge to form larger brownish streaks, the lesion epithelium ruptures , Leaf cells were necrotic,