小麦白粉病的流行是个复杂的动态系统,是品种布局、菌源、栽培施肥条件、作物长势和气象条件等诸多因素综合作用的结果。因此单单研究其与某一、二个环境因素的关系,通过数理统计回归分析所建立起来的数学预测模型往往精度不高。为了提高预报准确率,我们应用邓聚龙教授提出的“灰色系统理论”,对小麦白粉病的流 The prevalence of wheat powdery mildew is a complex dynamic system, is the result of a variety of factors such as variety layout, bacterial sources, fertilization conditions, crop growth and weather conditions. Therefore, simply by studying its relationship with one or two environmental factors, the mathematical prediction model established by mathematical statistic regression analysis is often not accurate enough. In order to improve the prediction accuracy, we apply the “gray system theory” proposed by Professor Deng Ju-long to analyze the flow of wheat powdery mildew