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奈曼旗新镇林场现有林地面积22万多亩,杨树和油松为主要树种,其中杨树占80％以上。由于这里的树种单一,森林病虫害经常大量发生。杨干象甲、松毛虫、黄化病等严重地危害着林木。特别是杨干象甲危害最为严重,被害株率达30～100％。这个林场自1978年开始抓森林病虫害防治工作以来,已取得了显著成效。松毛虫已基本被控制,虫口密度由原来的21.4下降到2.7以下,杨干象甲被害株率1978年的31.7％下降到20％以下。今年,这个林场对森防工作实行了责任制,将任务落实到由技术人员和工人组成的森
The existing forest area of Naiman Banner Xinzhen Forest Farm covers an area of more than 220,000 mu. Poplar and Pinus tabulaeformis are the major tree species, of which poplar accounts for more than 80%. Due to the single species here, forest pests and diseases often occur in large numbers. Yang dry beetles, pine caterpillars, yellow disease seriously endanger the trees. In particular, Yang dry as the worst endangered, victims of strain rate of 30 to 100%. This forest farm has made remarkable achievements since it began its efforts in the prevention and control of forest pests and diseases in 1978. Dendrolimus has been basically controlled, population densities from the original 21.4 down to 2.7 below, Yang Tsumu a victimization rate of 31.7% in 1978 dropped below 20%. This year, this forest farm has implemented a system of accountability for the prevention of alien disease, and the task has been put down to the task of building a forest of people who are technicians and workers