杨树为吉林省主要造林树种之一，由于其速生丰产，适应性强，用途广泛，深受人们欢迎。吉林省“三北”防护林地区杨树占造林面积的９０％以上。随着杨树林地面积不断增加，杨树害虫的为害也日益加重。近年来，在这一地区认真贯彻了“预防为主，综合防治”的森林保护方针，使杨 Poplar is one of the main afforestation species in Jilin Province. Because of its fast-growing and high-yielding, adaptable and versatile, poplar is well received by people. Poplar trees in the “Three Norths” shelterbelt in Jilin Province account for more than 90% of the afforestation area. With poplar forest area continues to increase, the damage of poplar pests are also increasing. In recent years, the forest protection principle of “prevention first and comprehensive prevention and control” has been conscientiously implemented in this area,