近年来,豫北地区小麦白粉病逐年加重,严重影响小麦高产稳产。经过几年的防治研究与实践,我们认为粉锈宁是春季防治小麦白粉病较理想的农药。1991年新乡市防治小麦白粉病307万亩次,其中粉锈宁防治205.25万亩次,占防治面积的66.8%,共挽回小麦3720.3万公斤,收到了较好的效果。具体应用技术与体会:1.用药量确定适宜的用药量除取决于药剂性质外,与小麦品种的感病性、病情的 In recent years, wheat powdery mildew in northern Henan increased year by year, seriously affecting the high and stable yield of wheat. After several years of prevention and control research and practice, we think triadimefon is a better pesticide against wheat powdery mildew in spring. In 1991, the city of Xinxiang City controlled 3.07 million mu of powdery mildew, of which 20.2525 million mu were treated with triadimefon, accounting for 66.8% of the area under control. A total of 37.203 million kilograms of wheat were recovered, and a good result was received. The specific application of technology and experience: 1. The amount of medication to determine the appropriate dosage depends, in addition to pharmaceutical properties, and wheat varieties susceptibility, disease