1988年以来,对杨、柳、榆等树具有毁灭性危害的蛀干害虫光肩星天牛先后从宁夏回族自治区、包头市传入伊盟鄂托克前旗、鄂托克旗、达拉特旗的25个乡(苏木、镇)和5个国营林场(治沙站),受害林木面积已达5万亩(近查已超过13万亩——编者注),虫害严重地区林木受害率在80%以上。 Since 1988, the insect pest Ophiopogon japonicus, which has a devastating effect on the trees such as Yang, Liu and Elm, successively passed from Ningxia Hui Autonomous Region and Baotou City to the Ertok Banner, Etuoke Banner and Dalat Banner Township (Sumu, town) and five state-owned forest farms (sand control station), the affected area of ​​trees has reached 50000 acres (recent survey has more than 130000 acres - editor’s note), pests in areas of serious damage in 80% the above.