Our use of Cookies

This site uses only cookiesstrictly necessaryto ensure the site works correctly.

Please read about how we use cookies.

Hide this message

Strictly necessary and non-essential cookies

Accept all cookies

Accept necessary cookies only

Set Cookie Preferences

By clicking accept all cookies, you agree to our use of cookies and to our cookie policy.

We use third-party cookies on this site.

You have accepted necessary cookies only

You can change your cookie settings at any time

Hide this message

UK Risk Register Details for Adelges tsugae

This record was last updated on 15/09/2021

Common Names

  • Hemlock chermes
  • Hemlock Woolly Adelgid

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced

Pathway Assessed for Entry to UK

  • show / hide
  • Plants for planting (except seeds bulbs and tubers)

Common Pathways

  • show / hide
  • Plants for planting (except seeds bulbs and tubers)
  • Cut flowers or branches
  • Hitchhiking

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 3
Impact [1 - 5] 5
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 15
UK Relative Risk Rating [1 - 125] 30

Current Mitigations

  • show / hide

Key mitigation for pest

Prohibition of key pathway

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

Mitigated Risks

Likelihood [1 - 5] 1
Spread [1 - 5] 3
Impact [1 - 5] 5
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 5
UK Relative Risk Rating [1 - 125] 10

Proposed Actions

Proposed Actions

Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Distribution and Pest Details

Distribution

Country / Territory Status Notes
Europe
United Kingdom Absent
North America
Canada Present (Limited)
United States Present (Limited)
Asia
China Present
Japan Present
India Present
Taiwan Present

Type of Pest

  • Insect (Hemiptera)

Host or Industry at Risk

  • show / hide

Arboretum or ornamental trees

Major Hosts

  • Picea polita (Sieb. & Zucc.) Carr.
  • Tsuga canadensis (L.) Carr.
  • Tsuga diversifolia (Maxim.) Mast.
  • Tsuga sieboldii Carr.

Threats to Protected Cultivation

  • N/A

Forest Tree Pests and Pathogens

  • Coniferous

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Not currently listed

Actions Indicated

  • show / hide

Action

Statutory action against findings but is not specifically listed in the legislation due to existing pathway prohibitions

General Comments

Adelgid pest of Tsuga and Picea with limited effects in its native range, but which has been very damaging to Eastern hemlock in North America. Prohibition in place to prevent entry of susceptible tree species from outside Europe.

Further Information

Uncertainty

  • show / hide

Key uncertainty for pest

Suitability of UK hosts

Climate

Current distribution

Hosts

Impact

Pathways

Regulation

Taxonomy

UK distribution

Risk Records for this Pest