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天牛是危害我国杨、柳、榆等树种的重要蛀干害虫,由于其蛀干危害、生活隐蔽、防治难度大而成为树木毁灭性害虫,多年一直制约着杨树等树种的栽植和发展。特别是光肩星天牛曾在我国西北地区大规模猖獗危害,致使“三北”防护林工程损失惨重。我县是陕西省天牛治理重点县,2001年被列入国家级天牛治理县。天牛的种类主要以光肩星天牛为主,最初发现于92年春季。主要发生在榆靖公路两侧的城关镇、新农村乡、东坑乡、梁镇等乡镇。分布范围东西长约80公里,南北宽约40公里。分布规律以乡镇及附近村庄的人口稠密区较为严重,以四旁树危害严
Cerambycidae is an important boring pest that endangers the species of poplar, willow and elm in China. It has been a devastating pest of trees for many years due to its harmful effects of stemming, hidden life, and prevention and treatment. It has restricted the cultivation and development of tree species such as poplar for many years. In particular, the light Shijian Tian cow was rampant in Northwest China rampant harm, resulting in “Three North ” shelter forest project suffered heavy losses. Our county is the key county for the management of Tian Niu in Shaanxi Province. In 2001, it was listed as the national Tian Niu governance county. The main types of Cerambycidae cerambycidae mainly found in the spring of 1992. Mainly occurred in Yu Cheng highway on both sides of the town, new rural village, Dongkeng Township, Liangzhen and other towns. The distribution of things about 80 km east-west, north-south width of 40 km. The distribution pattern is more serious in the densely populated areas of villages and towns and nearby villages,