胡杨苗期容易发生锈病、褐斑病、根腐病、蛴螬和尺蠖等多种病虫危害,特别是锈病,往往导致胡杨育苗前功尽弃。我圃通过近几年的防治试验,以及外地经验进行分析,认为胡杨苗期锈病的发生与空气温度、湿度、苗木密度、苗木生长好坏等有关。在温度 Poplar seedling prone to rust, brown spot, root rot, scabies and scallops and other pests and diseases hazards, especially rust, often lead to failure of poplar nurturing. I nursery through the prevention and control tests in recent years, as well as field experience analysis, that the occurrence of poplar seedling rust and air temperature, humidity, seedling density, seedling growth is good or bad and so on. At temperature