小麦纹枯病,又叫小麦尖眼斑病,原是我省小麦生产中的次要病害。近年来,由于水浇地面积扩大、播种量增加、小麦施肥量增多和生产水平的提高等因素影响,造成了麦田小气候的改变:透光通风性减弱、杂草增多、麦田湿度增大。诱发了纹枯病的发生和危害,以致上升为小麦的主要病害。全省每年发生面积均占麦播总面积的50％以上。一般麦田减产10％左右, Wheat sheath blight, also known as wheat sharp eye spot disease, was originally a secondary disease in wheat production in our province. In recent years, due to the expansion of irrigated land, increase of seeding rate, increase of fertilizing amount of wheat and increase of production level, the microclimate of wheat field is changed. The air permeability and ventilation are weakened, the weeds are increased and the humidity of wheat field is increased. Induced the occurrence and harm of sheath blight, which rose to the main disease of wheat. The annual area of ​​the province accounts for more than 50% of the total area of ​​broadcast of wheat. General wheat fields cut about 10%