盐源县小高山林业有害昆虫红脂大小蠹风险性评估

目的] 针对盐源小高山林业有害昆虫红脂大小蠹进行风险性评估,为该地区开展红脂大小蠹的防控、监测预警和风险管理提供依据。方法] 采用多指标综合评价法、风险分析方法,对影响红脂大小蠹的分布、传入定殖扩散、潜在危害、受害寄主经济重要性、危险性管理难度这5个因素进行分析,经查阅文献,并综合考虑红脂大小蠹在"国外、国内和盐源小高山"的分布对综合评价值R的影响,通过调整地理分布在评估系统的权重,进而优化评估体系,提出风险评估量化指标体系,计算红脂大小蠹的风险性分值。结果] 盐源县小高山红脂大小蠹的风险性分值为2.05,为高度危险发生害虫。结论] 红脂大小蠹已对盐源县小高山地区的云南松林造成一定的危害,应加强监测预警,防控其危害进一步扩大,为林业生态安全提供保障。

Risk assessment of harmful forest insect Dendroctonus valens in Xiaogaoshan, Yanyuan County

Aim] This evaluated the risk of invasion of Dendroctonus valens in forests of Xiaogaoshan,Yanyuan County as a basis for the prevention, early warning and risk management of the species in this area.Method] Multi index comprehensive evaluation method and risk analysis method were used to analyze five invasion factors:distribution; possibility of introduction, colonization and spread; potential harm; economic importance of the host; difficulty in preventing and controlling the invasive species. Through the literature and considering the influence of D. valens''s distribution, the paper put forward aquantitative index of risk assessment and calculate risk score by adjusting the weight of geographical distribution in the evaluation system.Result] The risk score of D. valens in Xiaogaoshan,Yanyuan County was 2.05, which was a high risk pest.Conclusion] D. valens had caused harm to the Pinus yunnanensis forest in Xiaogaoshan area of Yanyuan County. Monitoring and early warning should be strengthened to prevent and control the species to further expand and improve forest ecological security.