【摘要】 以历史资料为据 ,建立了气象因素对小麦白粉病影响的数学模型 ,经过回验 ,可以作为超长期预测模型应用 ;用多元回归法筛选因子 ,对其进行标准化处理 ,建立模糊关系进行聚类分析 ,把洛阳市小麦白粉病的生态地理划分为3类 ;当经济允许损失水平为 3.1 %时 ,防治指标为 3月中下旬的病情指数 9。更多还原

【Abstract】 According to historical data ,the effect of meterology factors on wheat powdery mildew was used to make a mathematics model which could be applied on super long term forecast model after a second examination. After sieving factors by pluratism regression method, dealing with it up to standard and analy zing equivosal relationship comprehensively, the ecology geography of wheat powdery mildew could be divided into three kinds. When the level of economic permitting demage was 3.1%, the prevention and cure quota was illness index number 9 in the middle and late March.更多还原