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UK Risk Register Details for 'Candidatus Phytoplasma solani'

This record was last updated on 08/01/2021

Common Names

  • Black wood of grapevine
  • Female sterility of tobacco
  • Fruit woodiness of tomato
  • Maize Redness
  • Mal azul of tomato
  • Metabolbur
  • Metastolbur
  • Parastolbur
  • Purple top of potato
  • Stolbur of potato
  • Stolbur of tobacco
  • Stolbur of tomato

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)
  • Natural spread

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 2
Impact [1 - 5] 4
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 60

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated quarantine pest (Great Britain, Northern Ireland may differ)



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 2
Impact [1 - 5] 4
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 12
UK Relative Risk Rating [1 - 125] 60

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Austria Present
Bulgaria Present
Croatia Present
Czech Republic Present
France Present
United Kingdom Absent
Germany Present
Greece Present
Hungary Present
Italy Present
Poland Present
Slovakia Present
Slovenia Present
Spain Present
Belgium Present
Albania Present
Bosnia-Herzegovina Present
Republic of North Macedonia Present
Moldova Present
Russia Present
Serbia Present
Switzerland Present
Turkey Present
Ukraine Present
Montenegro Present
South America Present
Chile Present
Africa Present
Niger Present
Jordan Present
Japan Present
India Present
Armenia Present
Azerbaijan Present
China Present
Iran Present
Israel Present
Kyrgyzstan Present
Lebanon Present
Saudi Arabia Present
Tajikistan Present
Uzbekistan Present

Type of Pest

  • Phytoplasma

Host or Industry at Risk

  • show / hide

Solanum tuberosum, Solanum lycopersicum

Major Hosts

  • Anethum graveolens L.
  • Apium graveolens L.
  • Capsicum annuum L.
  • Cichorium intybus L.
  • Convolvulus arvensis Linnaeus
  • Fragaria L.
  • Fragaria ananassa (F. x ananassa) Duch.
  • Lavandula L.
  • Lavandula angustifolia Mill.
  • Solanum lycopersicum L.
  • Monarda fistulosa L.
  • Paeonia suffruticosa Andr.
  • Paeonia tenuifolia L.
  • Pastinaca sativa L.
  • Phaseolus vulgaris L.
  • Pistacia vera L.
  • Prunus avium ssp./var. avium L.
  • Prunus cerasus L.
  • Prunus domestica ssp. domestica L.
  • Rubus nessensis W.Hall
  • Salvia L.
  • Solanum L.
  • Solanum malacoxylon Sendtn. In Mart.
  • Solanum melongena L.
  • Solanum nigrum L.
  • Solanum tuberosum L.
  • Trifolium L.
  • Tussilago farfara L.
  • Vaccinium L.
  • Valeriana officinalis L.
  • Vitis L.
  • Vitis vinifera ssp. vinifera L.
  • Zea mays L.
  • Solanaceae (family)
  • Asteraceae (family)

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 quarantine pest (Great Britain, Northern Ireland may differ), EPPO A2

Actions Indicated

  • show / hide


Statutory action against findings.

General Comments

Phytoplasma which potentially affects a wide host range, determined by the feeding behaviour of vectors. First UK outbreak in 2014, on strawberry.