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UK Risk Register Details for Pomacea spp.

Pest has been archived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 The information on this pest was correct as of 08/01/2021, but is no longer actively maintained.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 28/06/2021

Common Names

  • Apple snail

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)
  • release/escape of captive stock

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 4
Spread [1 - 5] 2
Impact [1 - 5] 3
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 24

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated quarantine pest (Northern Ireland)



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 2
Impact [1 - 5] 2
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 4
UK Relative Risk Rating [1 - 125] 8

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Spain Present (Limited)
United Kingdom Absent
North America
United States Present
South America
Argentina Present
Bolivia Present
Brazil Present
Chile Present
Paraguay Present
Uruguay Present
Papua New Guinea Present
Reunion Present
Cambodia Present
China Present
Indonesia Present
Israel Present
Japan Present
Laos Present
Malaysia Present
Philippines Present
South Korea Present
Taiwan Present
Thailand Present
Vietnam Present
Central America
Dominican Republic Present

Type of Pest

  • Other

Host or Industry at Risk

  • show / hide

Aquatic plants

Major Hosts

  • Alternanthera philoxeroides (Mart.) Griseb.
  • Colocasia esculenta var. antiquorum (L.)Sch.
  • Lactuca dregeana Dc.
  • Oryza sativa L.
  • Pistia L.
  • Sagittaria falcata Pursh
  • Hymenocallis liriosme (Raf.) Shinners
  • Aquatic plants

Threats to Protected Cultivation

  • Only protected crops

Forest Tree Pests and Pathogens

Further Information

PRA Availability

EFSA (2012)

Regulation and EPPO listing

  • show / hide

Regulated quarantine pest (Northern Ireland)

Actions Indicated

  • show / hide


No statutory action in Great Britain. Statutory action in line with regulations for Northern Ireland.

General Comments

Snails affecting rice fields in Spain though unlikely to be able to establish outdoors in the UK.

Risk Records for this Pest