Our use of Cookies

This site uses only cookiesstrictly necessaryto ensure the site works correctly.

Please read about how we use cookies.

Hide this message

Strictly necessary and non-essential cookies

Accept all cookies

Accept necessary cookies only

Set Cookie Preferences

By clicking accept all cookies, you agree to our use of cookies and to our cookie policy.

We use third-party cookies on this site.

You have accepted necessary cookies only

You can change your cookie settings at any time

Hide this message

UK Risk Register Details for Sweet potato little leaf phytoplasma

This record was last updated on 31/05/2022

Common Names

  • Dwarf disease of sweet potato
  • Little leaf of sweet potato
  • Witches' broom of sweet potato

Scenario and Pathways

Scenario for Risk Register

  • show / hide

Pathway Assessed for Entry to UK

  • show / hide

Common Pathways

  • show / hide

Risk Ratings and Current Mitigations

Unmitigated Risks

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

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated quarantine pest (Northern Ireland)



Industry Scheme

Contingency Plan



Mitigated Risks

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

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
Serbia Present
Turkey Present
United Kingdom Absent
South America
Brazil Present
Peru Present
Wallis et Futuna Present
Australia Present
Micronesia Present
New Caledonia Present
New Zealand Present
Palau Present
Papua New Guinea Present
Solomon Islands Present
Tonga Present
Vanuatu Present
Burkina Faso Present
Egypt Present
Ethiopia Present
Tanzania Present
Uganda Present
Israel Present
Myanmar Present
Pakistan Present
Saudi Arabia Present
Bangladesh Present
China Present
Indonesia Present
Japan Present
Malaysia Present
North Korea Present
Philippines Present
South Korea Present
Taiwan Present
Central America
Cuba Present

Type of Pest

  • Phytoplasma

Host or Industry at Risk

  • show / hide

Major Hosts

  • Allium cepa L.
  • Apium graveolens L.
  • Arachis hypogaea L.
  • Beta vulgaris L.
  • Brassica chinensis L.
  • Brassica oleracea L.
  • Capsicum annuum L.
  • Cucumis sativus L.
  • Daucus carota L.
  • Fragaria L.
  • Gerbera jamesonii H.Bolus Ex Hook.F.
  • Gypsophila paniculata L.
  • Helianthus L.
  • Hibiscus rosa-sinensis Linnaeus
  • Ipomoea batatas (L.) Poir./Lam.
  • Lactuca sativa L.
  • Malus Mill.
  • Manihot esculenta Crantz
  • Medicago sativa L.
  • Nicotiana tabacum L.
  • Passiflora edulis Sims
  • Pelargonium capitatum L'Hrit. Ex Ait./Soland./Willd.
  • Phaseolus vulgaris L.
  • Phoenix dactylifera L.
  • Prunus L.
  • Pyrus L.
  • Rosa L.
  • Solanum tuberosum L.
  • Spinacia oleracea L.
  • Trifolium repens L.
  • Citrus
  • Fabaceae (family)
  • Gossypium hirsutum

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Regulated quarantine pest (Northern Ireland)

Actions Indicated

  • show / hide


Statutory action

General Comments

The Risk Register entry for this pest is extremely incomplete and it cannot be compared with other pests on the Risk Register at the current time. As this pest is listed in the legislation, we are making available the information we have gathered on the pest so far. We will add new information to this pest entry in due course.