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对青铜峡防护林天牛的危害，选择多指标进行了分类，并建立每类的判别函数，为杨树天牛害虫危害的监测和综合管理提供了科学的依据和手段。
The results showed that the damage to the beetle of the Qingtongxia shelter forest was classified according to multiple indexes and the discriminant function of each type was established. It provided a scientific basis and method for the monitoring and integrated management of the pest damage of the poplar.