小麦白粉病是我县小麦产区的重要病害之一。自1979年以来,随着小麦品种退化、密度加大和偏施氮素化肥,加之气候适宜,小麦白粉病连年严重发生。1981年,108万亩小麦,发生白粉病面积达40多万亩,成灾面积近10万亩左右,千粒重降低4.25％。82年全面推行小麦白粉病综合防治措施,使84年小麦白粉病发生面积减少到2.1万亩, Wheat powdery mildew is one of the most important diseases in the wheat producing areas in our county. Since 1979, wheat powdery mildew has been seriously impacted in recent years with the deterioration of wheat varieties, the increased density and the partial application of nitrogenous fertilizers and the suitable climate. In 1981, 1080000 acres of wheat, occurrence of more than 400000 acres of powdery mildew, disaster area of ​​nearly 100000 acres, 1000 grain weight decreased 4.25%. 82 comprehensive implementation of comprehensive control measures of wheat powdery mildew, so that the area of ​​84 years of wheat powdery mildew reduced to 2.1 million mu,