UK Risk Register Details for Tylenchulus semipenetrans

This record was last updated on 20/05/2020

Common Names

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

Scenario and Pathways

Scenario for Risk Register

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  • Pest is introduced

Pathway Assessed for Entry to UK

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  • Plants for planting (with soil)

Common Pathways

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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] 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

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Key mitigation for pest

Regulated non quarantine pest



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

Type of Pest

  • Nematode (Tylenchida)

Host or Industry at Risk

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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 ssp. 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

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Regulated non quarantine pest

Actions Indicated

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Statutory action in line with legislation

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


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Key uncertainty for pest

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


Current distribution






UK distribution

Risk Records for this Pest