Department for Environment, Food & Rural Affairs

Department
for Environment
Food & Rural Affairs

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Pest has been archived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 The information on this pest was correct as of 03/07/2020, but is no longer actively maintained.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

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Gypsy moth

Scenario and Pathways

Scenario for Risk Register

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Pest spreads to maximum extent

Pathway Assessed for Entry to UK

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Common Pathways

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Hitchhiking
Natural spread

Risk Ratings and Current Mitigations

Unmitigated Risks

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Likelihood For "Pest is Introduced" the lowest value of Entry or Establishment, as both are required for a successful introduction. For "Pest Spreads to Maximum Extent" this is an expert judgement on the likelihood of this occurrence. See Guidance Document for more Information Likelihood [1 - 5]			3
Entry The Likelihood of movement of the pest into the UK on a pathway and transfer of that pest to a suitable host. See Guidance Document for more Information Entry [1 - 5]
Establishment The likelihood of the pest surviving and perpetuating in the UK for the foreseeable future after it has entered. See Guidance Document for more Information Establishment [1 - 5]
Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Spread [1 - 5]		2
Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Impact [1 - 5]		2
Impact - Economic The predicted economic impacts of the pest in the UK. This includes direct effects on yield, quality and possible indirect effects such as trade implications. See Guidance Document for more Information Impact - Economic [1 - 5]		2
Impact - Environmental The proportion of the environmental value of the plant which is likely to be lost through the introduction of the pest. See Guidance Document for more Information Impact - Environmental [1 - 5]		2
Impact - Social The predicted social impacts of a pest in the UK, including effects on tourism, amenities and animal and human health. See Guidance Document for more Information Impact - Social [1 - 5]		2
Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Value at Risk [1 - 5]				5
Likelihood x Impact The likelihood multiplied by the impact, which shows the risk to the sector. See Guidance Document for more Information Likelihood x Impact [1 - 25]	6
UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information UK Relative Risk Rating [1 - 125]	30

Current Mitigations

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Key mitigation for pest

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

Mitigated Risks

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Likelihood For "Pest is Introduced" the lowest value of Entry or Establishment, as both are required for a successful introduction. For "Pest Spreads to Maximum Extent" this is an expert judgement on the likelihood of this occurrence. See Guidance Document for more Information Likelihood [1 - 5]			3
Entry The Likelihood of movement of the pest into the UK on a pathway and transfer of that pest to a suitable host. See Guidance Document for more Information Entry [1 - 5]
Establishment The likelihood of the pest surviving and perpetuating in the UK for the foreseeable future after it has entered. See Guidance Document for more Information Establishment [1 - 5]
Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Spread [1 - 5]		2
Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Impact [1 - 5]		2
Impact - Economic The predicted economic impacts of the pest in the UK. This includes direct effects on yield, quality and possible indirect effects such as trade implications. See Guidance Document for more Information Impact - Economic [1 - 5]		2
Impact - Environmental The proportion of the environmental value of the plant which is likely to be lost through the introduction of the pest. See Guidance Document for more Information Impact - Environmental [1 - 5]		2
Impact - Social The predicted social impacts of a pest in the UK, including effects on tourism, amenities and animal and human health. See Guidance Document for more Information Impact - Social [1 - 5]		2
Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Value at Risk [1 - 5]				5
Likelihood x Impact The likelihood multiplied by the impact, which shows the risk to the sector. See Guidance Document for more Information Likelihood x Impact [1 - 25]	6
UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information UK Relative Risk Rating [1 - 125]	30

Proposed Actions

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Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Distribution and Pest Details

Distribution

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Country / Territory		Status
Europe
	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
	Türkiye	Present
	Ukraine	Present
	United Kingdom	Present (Limited)
North America
	Canada	Present
	United States	Present
Africa
	Algeria	Present
	Morocco	Present
	Tunisia	Present
Asia
	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

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Insect (Lepidoptera)

Host or Industry at Risk

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Broadleaved trees

Major Hosts

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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

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Forest Tree Pests and Pathogens

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Broadleaved

Further Information

PRA

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PRA Availability

PRA not available

Regulation and EPPO listing

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Not currently listed

Actions Indicated

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Action

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

Lymantria dispar [SELECTED] [ARCHIVED]

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Department for Environment, Food & Rural Affairs

Departmentfor EnvironmentFood & Rural Affairs

UK Risk Register Details for Lymantria dispar

Pest has been archived

Common Names

Scenario and Pathways

Scenario for Risk Register

Pathway Assessed for Entry to UK

Common Pathways

Risk Ratings and Current Mitigations

Unmitigated Risks

Current Mitigations

Key mitigation for pest

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

Mitigated Risks

Proposed Actions

Proposed Actions

Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Distribution and Pest Details

Distribution

Type of Pest

Host or Industry at Risk

Major Hosts

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

Further Information

PRA

PRA Availability

Regulation and EPPO listing

Actions Indicated

Action

General Comments

Risk Records for this Pest

Department
for Environment
Food & Rural Affairs