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随着生产条件的改变和产量水平的提高,某些次要病害对作物的危害程度有日益加重的趋势.近年来在郑州通过田间取样考苗,观察到小麦纹枯病对小麦的危害比较严重.苗期病斑主要在茎基部近地面处的叶鞘上,拔节抽穗后,病斑开始向叶鞘与茎秆之间和茎壁、茎腔内发展.抗病品种茎壁不被侵染.1982年5月中旬随黄淮冬麦区南片小麦联合区域试验考察组到江苏的徐州,安徽的宿县、阜阳,本省的许昌、周口、虞城、郑
With the change of production conditions and the increase of production level, some secondary diseases have a growing tendency to crop damage.In recent years, through field sampling test seedlings in Zhengzhou, it was observed that the sharp impact of wheat sheath blight on wheat was serious Seedling lesions mainly on the leaf sheath at the base of the stem near the ground, after jointing and heading, the lesions began to develop between leaf sheaths and stems and between the stem and stem cavities. May mid-May with Huanghuai winter wheat southern wheat joint regional experimental study group to Xuzhou, Jiangsu Province, Anhui Suxian, Fuyang, Xuchang, Zhoukou, Yucheng, Zheng