叶瘿球角姬小蜂危害桉树人工林风险评估

Risk Analysis of the Harm Caused by Gall Wasp Ophelimus maskelli to Eucalyptus Plantations

摘要: 叶瘿球角姬小蜂属于膜翅目姬小蜂科，是2023年新发现危害广西桉树人工林的一种外来入侵害虫，主要危害Rut45-33、LH-11、DH299-5、DH201-2等桉树品种，寄生桉树叶片内，在叶片表面形成虫瘿，严重影响光合作用，导致树木生长衰退，1~2年生幼林受害较重。2024年发现该虫在广西20多个县(市、区)有分布。为了掌握这种害虫可能引发的灾害，有必要开展生物灾害风险评估。根据有害生物风险分析方法，从桉树叶瘿球角姬小蜂在广西壮族自治区内的分布、传播扩散能力、潜在危险性、受害植物重要性、危险性管控难度5个方面开展定性和定量风险分析。结果表明：桉树叶瘿球角姬小蜂的综合风险评估值R = 1.47，属于低度危险或接近中度危险的物种。

Abstract: Eucalyptus gall wasp Ophelimus maskelli belongs to the family Eulophidae, who was a new invasive pest which damaged eucalyptus plantations discovered in Guangxi in 2023. It mainly damages some clones of eucalyptus, such as Rut45-33, LH-11, DH299-5, DH201-2. It forms galls on the leaf surface and serious impact on photosynthesis. 1~2 years old young forests are more severely affected. The insect was discovered in 20 counties in Guangxi in 2024. In order to assess the potential disasters that this pest may cause, it is necessary to conduct a biological disaster risk assessment. According to the pest risk analysis method, qualitative and quantitative risk analysis was made which was based on the pest distribution, spread and diffusion capability, potential danger, importance of victimized plants, difficulty in control. The result shows that the comprehensive risk assessment value R = 1.47. It was classified as a low-risk or rear middle-risk species.