UK Risk Register Details for Lymantria dispar

Pest has been archived

This pest has been assessed for the Risk Register and is considered to pose a low risk to the UK. The information on this pest was correct as of 03/07/2020, but is no longer actively maintained. It will only be updated if new information is received which indicates the potential for a significant increase in risk to the UK.

This record was last updated on 03/07/2020

Common Names

  • Gypsy moth

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
This section is currently being developed as part of the next phase of the Risk Register.

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 2
Impact [1 - 5] 2
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 30

Current Mitigations

  • show / hide

Key mitigation for pest



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 2
Impact [1 - 5] 2
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 30

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Estonia Present
Austria Present
Belgium Present
Bulgaria Present
Croatia Present
Cyprus Present
Czech Republic Present
Denmark Present
Finland Present
France Present
Germany Present
Greece Present
Hungary Present
Italy Present
Lithuania Present
Netherlands Present
Poland Present
Portugal Present
Romania Present
Slovakia Present
Spain Present
Sweden Present
Republic of North Macedonia Present
Belarus Present
Moldova Present
Russia Present
Serbia Present
Switzerland Present
Turkey Present
Ukraine Present
United Kingdom Present (Limited)
North America
Canada Present
United States Present
Algeria Present
Morocco Present
Tunisia Present
Afghanistan Present
China Present
India Present
Iran Present
Iraq Present
Israel Present
Japan Present
Kazakhstan Present
North Korea Present
South Korea Present
Kyrgyzstan Present
Lebanon Present
Syria Present
Taiwan Present
Tajikistan Present
Turkmenistan Present
Uzbekistan Present
Azerbaijan Present

Type of Pest

  • Insect (Lepidoptera)

Host or Industry at Risk

  • show / hide

Broadleaved trees

Major Hosts

  • Acer L.
  • Betula L.
  • Deciduous trees
  • Malus domestica Borkhausen
  • Prunus L.
  • Pyrus pyraster Burgsd.
  • Quercus L.
  • Quercus petraea (Matt.) Liebl.
  • Quercus robur L.
  • Salix L.
  • Ulmus L.
  • Fruit trees

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Not currently listed

Actions Indicated

  • show / hide


No statutory action against findings. Surveillance by stakeholders and other organisations

General Comments

Moth pest of many deciduous trees, established in parts of southern England. Eradication not feasible, but UK climate unlikely to be suitable for populations to reach levels which would result in tree mortality. Stakeholder and other groups may be interested in monitoring spread.

Risk Records for this Pest