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UK Risk Register Details for Xylosandrus germanus

This record was last updated on 02/03/2023

Common Names

  • Black timber bark beetle
  • Smaller alnus bark beetle
  • tea root borer

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest spreads to maximum extent

Pathway Assessed for Entry to UK

  • show / hide

Common Pathways

  • show / hide
  • Plants for planting (except seeds bulbs and tubers)
  • Cut flowers or branches
  • Non-squared wood
  • Squared wood
  • Bark
  • Wood packaging material
  • Natural spread

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 4
Impact [1 - 5] 3
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 60

Current Mitigations

  • show / hide

Key mitigation for pest



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 4
Impact [1 - 5] 3
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 60

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Portugal Present
Croatia Present
Switzerland Present
United Kingdom Present (Limited)
Austria Present
Belgium Present
Czech Republic Present
Denmark Present
France Present
Germany Present
Hungary Present
Italy Present
Netherlands Present
Poland Present
Romania Present
Russia Present
Slovakia Present
Slovenia Present
Spain Present
Sweden Present
Türkiye Present
Ukraine Present
North America
Canada Present
United States Present
China Present
Japan Present
South Korea Present
Taiwan Present
Vietnam Present
Georgia Present
Russia Present

Type of Pest

  • Insect (Coleoptera)

Host or Industry at Risk

  • show / hide


Major Hosts

  • Abies Miller
  • Acer L.
  • Alnus Mill.
  • Betula L.
  • Camellia sinensis (L.) O.Kuntze
  • Carpinus betulus L.
  • Carya Nutt.
  • Castanea Mill.
  • Cornus L.
  • Corylus avellana Linnaeus
  • Fraxinus L.
  • Juglans nigra L.
  • Juglans regia L.
  • Magnolia L.
  • Picea A.Dietr.
  • Picea abies (L.) H. Karst.
  • Pinus densiflora Sieb. & Zucc.
  • Pinus parviflora Sieb. & Zucc.
  • Pinus sylvestris Linnaeus
  • Populus L.
  • Prunus L.
  • Pseudotsuga menziesii var. menziesii (Mirbel) Franco
  • Quercus L.
  • Salix L.
  • Styrax L.
  • Ulmus glabra Huds. em. Moss
  • Vitis vinifera L.
  • Fagus sylvatica L.

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

UK (2014)

Regulation and EPPO listing

  • show / hide

Not currently listed

Actions Indicated

  • show / hide


No statutory action against findings. Advice on good silvicultural practice.

General Comments

Ambrosia beetle affecting a wide range of trees and woody hosts. Widespread in Europe and elsewhere and now present in the south of England. Impacts can be reduced by good silvicultural practices.

Risk Records for this Pest