【摘要】 根据落叶松八齿小蠹(Ips subelongtus Motsch)的生物学特性、发生规律进行系统防治。包括以下内容:1)在发生基地内伐除危害超过防治指标的林木;2)火烧已伐除林木的发生基地及扩散到四周20m宽的林地;3)伐除已扩散、危害的林木、建立缓冲带;4)用化学药剂处理缓冲带内的伐根和其周围20m宽的健康林木。通过绥阳林业局会川经营所7.4 ha 20a生被害林的防治结果表明,使林分被害率在原来的基础上下降了98.49％,而防治总成本仅为8.10元/ha。更多还原

【Abstract】 Systematicly control of larch bark beetle was made according to the biological character, including following content. 1. Cutting over trees of surpass injured index; 2. Burning out the forest site and the forest 20m wide around; 3. Cutting the spreading injured forest site, building buffer zones; 4. Treating the stump in buffer zones and 20m wide health trees with chemical agent. The result of controlling 20 years old injured forest of 7.4 ha in Suiyang forestry bureau showed that the injured rate of forest reduced by 98.49％, and control cost is 8.10 yuan per ha.更多还原