对大理州疱锈病严重发生的华山松 ,采用均匀分布的典型整群抽样调查和树干解析方法 ,确定了病级与树高、径级和材积的平均生长量、损失量和损失率 ,各病情指数 (x)的损失量、损失率 (y)的相关数律 ,推导出华山松疱锈病损失率、经济阈值和防治指标的估测模型 The Picea crassifolia, a serious occurrence of blister rust in Dali prefecture, was evenly distributed by cluster sampling and tree trunk analysis method to determine the average level of disease and tree height, diameter and volume of the average growth, loss and loss rates, the disease Index (x) of the loss, the loss rate (y) of the correlation law, derived Pinus armandi rust blight rate of loss, economic threshold and control indicators of the estimated model