UK Risk Register Details for Hop stunt viroid

This record was last updated on 06/05/2020

Common Names

  • citrus gummy bark viroid
  • grapevine viroid
  • hop stunt disease
  • Little leaf of citrus
  • mulberry vein clearing
  • peach dapple viroid
  • plum dapple viroid
  • Stem pitting of sour orange
  • Xyloporosis of citrus

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
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] 4
Spread [1 - 5] 2
Impact [1 - 5] 4
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 16
UK Relative Risk Rating [1 - 125] 48

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated non quarantine pest. Industry certification scheme for planting material



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 2
Impact [1 - 5] 4
Value at Risk [1 - 5] 3
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 36

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country Status Notes
Europe Present
Austria Present
Cyprus Present
Czech Republic Present
Spain Present
Finland Present
France Present
United Kingdom Absent
Greece Present
Italy Present
Netherlands Present
Portugal Present
Serbia Present
North America Present
United States Present (Limited)
South America Present
Argentina Present
Brazil Present
Colombia Present
Ecuador Present
Suriname Present
Venezuela Present
New Zealand Present
Africa Present
Algeria Present
Egypt Present
Morocco Present
Nigeria Present
Sudan Present
Tunisia Present
South Africa Present
China Present
Israel Present
India Present
Iran Present
Jordan Present
Japan Present
South Korea Present
Lebanon Present
Philippines Present
Saudi Arabia Present
Syria Present
Thailand Present
Yemen Present
Central America
Jamaica Present
Trinidad and Tobago Present

Type of Pest

  • Virus or Viroid

Host or Industry at Risk

  • show / hide

Humulus lupulus, Prunus, Cucumis

Major Hosts

  • Citrus limon (Linnaeus) N.L.Burman
  • Citrus paradisi Macfadyen
  • Citrus reticulata (s.l.)
  • Citrus sinensis (Linnaeus) Osbeck
  • Cucumis sativus L.
  • Ficus carica L.
  • Fortunella Swing.
  • Fragaria ananassa (F. x ananassa) Duch.
  • Hibiscus rosa-sinensis Linnaeus
  • Humulus lupulus L.
  • Malus Mill.
  • Poncirus Rafin.
  • Prunus armeniaca L.
  • Prunus avium ssp./var. avium L.
  • Prunus domestica ssp. domestica L.
  • Prunus domestica ssp. insititia L.
  • Prunus dulcis (Mill.) D.A.Webb
  • Prunus mume Sieb. & Zucc.
  • Prunus persica Batsch
  • Punica granatum L.
  • Pyrus communis L.
  • Vitis vinifera ssp. vinifera L.
  • Ziziphus mauritiana Lam.
  • Citrus

Threats to Protected Cultivation

  • Both protected crops and outdoor production

Forest Tree Pests and Pathogens

Further Information

PRA Availability

UK (2014)

Regulation and EPPO listing

  • show / hide

Regulated non quarantine pest

Actions Indicated

  • show / hide


Statutory action will be taken. Benefits of certification in maintaining disease freedom to be publicised.

General Comments

Pest of hops present in America and parts of Europe. PHPS provides good assurance of disease freedom.

Risk Records for this Pest