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UK Risk Register Details for 'Candidatus Phytoplasma australiense'

This record was last updated on 26/05/2022

Common Names

  • Australian grapevine yellows
  • Australian lucerne yellows
  • Australian yellows of grapevine
  • Coprosma lethal decline phytoplasma
  • Cordyline sudden decline phytoplasma
  • cottonbush reduced yellow leaves phytoplasma
  • cottonbush witches' broom phytoplasma
  • Liquidambar yellows phytoplasma
  • papaya dieback phytoplasma
  • periwinkle phyllody phytoplasma
  • Phormium yellow leaf phytoplasma
  • pumpkin yellow leaf curl phytoplasma
  • strawberry green petal phytoplasma

Scenario and Pathways

Scenario for Risk Register

  • show / hide
  • Pest is introduced with vector or finds vector

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)

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 3
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.



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 2
Spread [1 - 5] 3
Impact [1 - 5] 4
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 8
UK Relative Risk Rating [1 - 125] 40

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
United Kingdom Absent
Australia Present
New Zealand Present
Israel Present

Type of Pest

  • Phytoplasma

Host or Industry at Risk

  • show / hide

Fragaria, Vitis

Major Hosts

  • Apium graveolens L.
  • Carica papaya L.
  • Coprosma robusta Raoul
  • Cordyline australis (Forster F.) Hooker F./Endlicher
  • Cucurbita maxima Duch.
  • Cucurbita moschata Duch. Ex Poir.
  • Fragaria L.
  • Fragaria ananassa (F. x ananassa) Duch.
  • Gomphocarpus fruticosus (L.) R.Br./Ait.F.
  • Phormium J.R. & G.Forst.
  • Phormium tenax J.R. & G.Forst
  • Rubus L.
  • Solanum pseudocapsicum L.
  • Solanum tuberosum L.
  • Vitis vinifera L.

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

Actions Indicated

  • show / hide


Statutory action against findings

General Comments

Phytoplasma present in Australia, New Zealand and Israel, which could be damaging to grapevine and strawberry production, in particular, if introduced to the UK.

Further Information


  • show / hide

Key uncertainty for pest

The effect of different pathogen strains on different host species


Current distribution






UK distribution