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研究表明，小麦白粉病病原菌引起小麦成株期穗部和叶部发病，造成不同的产量损失。穗部发病小麦百穗重减少３８．５％～４８．６％，千粒重降低３１．４％～４８．３％；旗叶发病小麦百穗重减少１９．３％～２２．１％，千粒重降低１１．４％～２０．４％，顶二叶发病小麦百穗重减少９．５％～１１．３％，千粒重降低７．９％～１２．８％；顶三叶以下发病小麦百穗重减少１．７％～５．２％，千粒重降低０．６％～４．３％。大田用粉锈宁防治防效为８５．３％，比未防田增加纯收益１１２８．９０元／ｈｍ２，收益与防治成本之比达１３∶１。
Studies have shown that pathogen of wheat powdery mildew caused the onset of wheat panicle and leaf stage, resulting in different yield losses. The ear weight per ear decreased by 38.5% -48.6% and the thousand-grain weight decreased by 31.4% -48.3%. The weight loss of flag leaf-ear wheat per ear decreased by 19.3% -22.1% and the grain weight per thousand decreased 11.4% ~ 20.4%, the weight of the top two leaves decreased by 9.5% ~ 11.3% and the thousand-grain weight decreased by 7.9% ~ 12.8% Reduce 1.7% ~ 5.2%, 1000 grain weight decreased 0.6% ~ 4.3%. Field control with triadimefon was 85.3%, an increase of 1128.90 yuan / hm2 than that of non-anti-field, with a ratio of return to control of 13: 1.