白粉病是我县小麦的重要病害。近几年来,由于施用的肥料种类以有机肥为主变为以化学肥料为主,播种方式以条播为主改为以板田撒播为主,而栽培管理措施未能作出相应的改进,致使白粉病的发病程度有逐年加重的趋势。发病后的小麦,光合作用面积减少,呼吸强度和蒸腾作用增大,消耗了大量 Powdery mildew is an important disease of wheat in our county. In recent years, due to the type of fertilizer used, organic fertilizer was the main type of chemical fertilizers. The sowing method mainly changed from sowing to sowing and the cultivation management measures failed to make corresponding improvements. As a result, The incidence of disease has increased year by year trend. After the onset of wheat, photosynthesis area decreased, respiratory intensity and transpiration increased, consuming a large amount