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通过１９９７年在四川剑阁以粉锈宁不同浓度造成白粉病病情梯度的试验，分别比较了现行较多的以茎和叶为单位的两种病情调查分级方法及小麦扬花、灌浆、乳熟期病情与千粒重的关系，结果表明：小麦白粉病成株期的调查，以叶为单位的病情调查分级方法更优，建议成株期白粉病病情记载采用病叶率和叶病指；扬花、灌浆、乳熟三期，均以叶病指与千粒重的相关最高，扬花期病情对千粒重影响最大。
Through the test of the gradient of powdery mildew caused by different concentrations of triadimefon in Jiangyong, Sichuan Province in 1997, we compared the current prevalence of grading, stems and leaves and the methods of flowering, grain filling, milky mildew and 1000-grain weight The results showed that the investigation of wheat powdery mildew at adult stage was more superior to the method of disease investigation and classification based on leaf. It is suggested that disease incidence rate and leaf disease index of adult powdery mildew disease should be recorded; flowering, filling and milk ripening In the third period, leaf disease index was the highest correlated with 1000-grain weight, and blooming stage had the greatest impact on 1000-grain weight.