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森林火灾、森林病虫害和乱砍滥伐是森林的三大敌人。对于造林绿化而言,森林虫害是他们之中的“龙头老大”。根据我省延安、宝鸡、咸阳、森工系统的调查,森林鼠害对于提高造林成活率、保存率已构成威胁。延安地区自1990年以来,森林鼠害泛滥成灾,直接影响工程造林和各项农林业生产的正常进行。吴旗、志丹、安塞、延安、延川等7县市新造幼林遭受达乌尔鼠兔的为害面积已达260万
Forest fires, forest pests and deforestation are the three major enemies of forests. For afforestation, forest pests are among them “leading boss.” According to the investigation of our province Yan’an, Baoji, Xianyang and forest labors, forest rodent has threatened the survival rate of afforestation and the preservation rate. Yan’an area Since 1990, the spread of forest rodent infestation has a direct impact on the normal afforestation and various agricultural and forestry production. Wuqi, Zhidan, Ansai, Yan’an, Yanchuan and other 7 counties and cities affected Daur mouse poisoning area has reached 2.6 million