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Pest categorisation of Arceuthobium spp. (non-EU)
EFSA Journal. European Food Safety Authority
|July 7, 2020
Summary
Non-EU dwarf mistletoes (Arceuthobium spp.) pose a potential risk to European conifers. They meet criteria for quarantine pests, but uncertainties remain regarding their distribution and impact on native European trees.
Area of Science:
- Plant Pathology
- Forest Entomology
- Invasive Species Biology
Background:
- Arceuthobium spp. (non-EU), or dwarf mistletoes, are parasitic plants affecting conifers.
- These species are regulated in the EU due to their harmful potential.
Purpose of the Study:
- To perform a pest categorisation of non-EU Arceuthobium spp. for the European Commission.
- To assess the risk of introduction, establishment, and spread in the EU.
Main Methods:
- Review of existing data on Arceuthobium spp. distribution, host range, and biology.
- Assessment against criteria for quarantine pests and regulated non-quarantine pests.
Main Results:
- Non-EU Arceuthobium spp. meet the criteria for a potential quarantine pest.
- Potential pathways for introduction exist, though currently closed.
- Favorable conditions for establishment and spread in the EU are present.
Conclusions:
- Non-EU dwarf mistletoes represent a significant phytosanitary risk to the EU.
- Further research is needed on European conifer susceptibility and precise Arceuthobium distribution.
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