Department for Environment, Food & Rural Affairs

Department
for Environment
Food & Rural Affairs

UK Risk Register Details for Liriomyza trifolii

This record was last updated on 25/07/2023

Common Names

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American serpentine leaf miner
broad bean leaf miner
Californian leaf miner
Celery leaf miner
Chrysanthemum leaf miner

Scenario and Pathways

Scenario for Risk Register

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Pest is introduced

Pathway Assessed for Entry to UK

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Cut flowers or branches

Common Pathways

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Plants for planting (except seeds bulbs and tubers)
Cut flowers or branches
Fruits or vegetables

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]			3
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]					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]			3
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]			3
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]	1
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]				4
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]	9
UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information UK Relative Risk Rating [1 - 125]	36

Current Mitigations

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Key mitigation for pest

Regulated quarantine pest (Great Britain). Regulated protected zone quarantine pest (Northern Ireland). EPPO A2

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]		2
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]		2
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]			3
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]			3
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]			3
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]	1
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]				4
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]	24

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		Present
	Bosnia-Herzegovina	Present
	Russia	Present
	Serbia	Present
	Spain	Present
	Switzerland	Present
	Türkiye	Present
	Moldova	Present
	United Kingdom	Absent
	Austria	Present
	Belgium	Present
	Croatia	Present
	Cyprus	Present
	Finland	Present
	France	Present
	Greece	Present
	Italy	Present
	Malta	Present
	Netherlands	Present
	Portugal	Present
	Romania	Present
North America
	Canada	Present
	Mexico	Present
	United States	Present
South America
	Brazil	Present
	Chile	Present
	Colombia	Present
	Ecuador	Present
	French Guiana	Present
	Guyana	Present
	Peru	Present
	Venezuela	Present
	Argentina	Present
Oceania
	Micronesia	Present
	Samoa	Present
	Tonga	Present
	Australia	Present
	Fiji	Present
Africa		Present
	Benin	Present
	Cote d'Ivoire	Present
	Egypt	Present
	Ethiopia	Present
	Guinea	Present
	Kenya	Present
	Madagascar	Present
	Mauritius	Present
	Mayotte	Present
	Morocco	Present
	Nigeria	Present
	Reunion	Present
	Senegal	Present
	South Africa	Present
	Sudan	Present
	Tanzania	Present
	Tunisia	Present
	Zambia	Present
	Zimbabwe	Present
Asia		Present
	China	Present
	India	Present
	Iran	Present
	Israel	Present
	Japan	Present
	South Korea	Present
	Lebanon	Present
	Oman	Present
	Saudi Arabia	Present
	Philippines	Present
	Taiwan	Present
	United Arab Emirates	Present
	Yemen	Present
	Vietnam	Present
	Jordan	Present
Central America
	Barbados	Present
	Bermuda	Present
	Costa Rica	Present
	Cuba	Present
	Dominican Republic	Present
	Guadeloupe	Present
	Guatemala	Present
	Martinique	Present
	Antigua and Barbuda	Present
	Puerto Rico	Present
	Saint Kitts and Nevis	Present
	Trinidad and Tobago	Present
	British Virgin Islands	Present
	Bahamas	Present

Type of Pest

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Insect (Diptera)

Host or Industry at Risk

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Total protected cultivation

Major Hosts

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Abelmoschus esculentus (L.) Moench
Allium cepa L.
Allium porrum L.
Allium sativum L.
Apium graveolens L.
Arachis hypogaea L.
Aster L.
Beta vulgaris L.
Brassica L.
Brassica chinensis L.
Callistephus Cass.
Capsicum annuum L.
Chrysanthemum L.
Citrullus lanatus (Thunb.) Matsum. & Nakai
Cucumis L.
Cucumis melo L.
Cucumis sativus L.
Cucurbita pepo L.
Cucurbitaceae
Dahlia Cav.
Dahlia hybrids
Chrysanthemum x morifolium Ramat.
Dianthus L.
Dianthus caryophyllus L.
Gaillardia Foug.
Gerbera L. Ex Cass. Corr. Spreng.
Gerbera jamesonii H.Bolus Ex Hook.F.
Glycine max (L.) Merr.
Gossypium L.
Gypsophila L.
Gypsophila paniculata L.
Helianthus L.
Lactuca sativa L.
Lathyrus L.
Solanum lycopersicum L.
Medicago sativa L.
Pericallis x hybrida R.Nordenstam
Phaseolus coccineus L.
Phaseolus lunatus L.
Phaseolus vulgaris L.
Pisum sativum Linnaeus
Salvia L.
Solanum tuberosum L.
Spinacia oleracea L.
Tagetes L.
Trifolium L.
Tropaeolum L.
Vigna Savi
Zinnia L.
Asteraceae (family)
Gossypium hirsutum

Threats to Protected Cultivation

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Only protected crops

Forest Tree Pests and Pathogens

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Further Information

PRA

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PRA Availability

PRA not available

Regulation and EPPO listing

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Regulated quarantine pest (Great Britain). Regulated protected zone quarantine pest (Northern Ireland). EPPO A2

Actions Indicated

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Action

Statutory action against findings

General Comments

Regulated polyphagous leafmining fly pest. Often intercepted on various host plants.

Risk Records for this Pest

Liriomyza trifolii [SELECTED]

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Department for Environment, Food & Rural Affairs

Departmentfor EnvironmentFood & Rural Affairs

UK Risk Register Details for Liriomyza trifolii

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