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UK Risk Register Details for Tylenchulus semipenetrans

Pest has been archived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 The information on this pest was correct as of 08/01/2021, but is no longer actively maintained.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

  • Citrus nematode
  • Citrus root nematode
  • Nematode, citrus
  • Root nematode

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced

Pathway Assessed for Entry to UK

  • show / hide
  • Plants for planting (with soil)

Common Pathways

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

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 1
Impact [1 - 5] 3
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 12

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated non quarantine pest (Northern Ireland)



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 1
Impact [1 - 5] 3
Value at Risk [1 - 5] 2
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 12

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Albania Present
Cyprus Present
France Present
Greece Present
Italy Present
Malta Present
Portugal Present
Spain Present
Türkiye Present
United Kingdom Absent
North America
Mexico Present
United States Present
South America
Argentina Present
Bolivia Present
Brazil Present
Chile Present
Colombia Present
Peru Present
Uruguay Present
Venezuela Present
Australia Present
Fiji Present
French Polynesia Present
New Caledonia Present
Papua New Guinea Present
Samoa Present
Tonga Present
Algeria Present
Central African Republic Present
Congo (Brazzaville) Present
Congo (Democratic Rep.) Present
Cote d'Ivoire Present
Egypt Present
Ethiopia Present
Guinea Present
Kenya Present
Libya Present
Malawi Present
Morocco Present
Mozambique Present
Nigeria Present
Senegal Present
South Africa Present
Sudan Present
Tanzania Present
Tunisia Present
Uganda Present
Zimbabwe Present
Afghanistan Present
Azerbaijan Present
Bahrain Present
Brunei Present
China Present
India Present
Indonesia Present
Iran Present
Iraq Present
Israel Present
Japan Present
Jordan Present
Lebanon Present
Malaysia Present
Oman Present
Pakistan Present
Philippines Present
Saudi Arabia Present
South Korea Present
Sri Lanka Present
Syria Present
Taiwan Present
Thailand Present
Uzbekistan Present
Vietnam Present
Yemen Present
Central America
Belize Present
Bermuda Present
Costa Rica Present
Cuba Present
Dominica Present
El Salvador Present
Grenada Present
Guadeloupe Present
Honduras Present
Jamaica Present
Martinique Present
Panama Present
Puerto Rico Present
Saint Lucia Present
Saint Vincent and the Grenadines Present
Trinidad and Tobago Present

Type of Pest

  • Nematode (Tylenchida)

Host or Industry at Risk

  • show / hide

Vitis vinifera

Major Hosts

  • Diospyros L.
  • Fortunella Swing.
  • Olea europaea Linnaeus
  • Philadelphus coronarius L.
  • Poncirus Rafin.
  • Poncirus trifoliata (Linnaeus) Rafinesque
  • Syringa vulgaris L.
  • Vitis vinifera L.
  • Citrus

Threats to Protected Cultivation

  • N/A

Forest Tree Pests and Pathogens

  • Broadleaved

Further Information

PRA Availability

UK (2002)

Regulation and EPPO listing

  • show / hide

Regulated non 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

Nematode pest affecting mainly crops in the Mediterranean which has been intercepted in the UK. Unlikely to pose a significant plant health threat, but UK vineyards may wish to take into account when sourcing supplies.

Further Information


  • show / hide

Key uncertainty for pest

Whether this species could build up to damaging populations in the cooler UK climate.


Current distribution






UK distribution