森林鼠害近几年在我区中、东部的樟子松、落叶松人工林中普遍发生,危害性极大,特别是十年生左右的樟子松、落叶松林,被害更为严重。林木被害后,轻者生长缓慢,重者树皮环剥,造成林木死亡。被害鼠啃食的树皮,树根所造成的伤口,也是各种病原侵入的门户,是林木发生根腐、心腐和次期性害虫的直接原因。一、害鼠的种类、形态及生活习性: 1、棕背(鼠平):体长100毫米左右,尾长30毫米左右,为体长的1/3,尾毛较稀疏。背部红棕色,腹部淡灰白色或淡黄色。上额第三臼齿内侧有三个突出 Forest rodent in recent years in my area, the eastern part of Pinus sylvestris var. Mongolica and Larix gmelinii plantation widespread and extremely harmful, especially about ten years of Pinus sylvestris var. Mongolica and Larix forest, the more serious victims. After the tree was killed, the light was slow growth, severe barking of the bark, resulting in forest deaths. Wounds eaten rats bark, roots caused by wounds, but also a variety of pathogens invaded the portal, is the roots of root rot, heart rot and the direct cause of pests. First, the type of rat damage, morphology and habits: 1, brown back (rat flat): body length of about 100 mm, about 30 mm tail length, body length 1/3, tail hair more sparse. Back reddish brown, pale gray or light yellow abdomen. On the third molar on the inside of the three prominent