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1998年杨树主要食叶害虫——杨扇舟蛾、杨黄卷叶螟等在我县大面积暴发,杨树受害株率达90%以上,失叶率在10～80%不等,据县森防站及各乡、镇林业站调查统计(见表1)
1998 Poplar main leaf-eating pests - Yang Fan moths, Poplar and other leaf-roll in our county outbreaks, poplar strain rate of 90% or more, the loss rate of 10 to 80%, according to the county Sen defense stations and townships, township forestry station survey statistics (see Table 1)