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UK Risk Register Details for Gymnosporangium yamadae

This record was last updated on 12/01/2021

Common Names

  • Apple juniper rust
  • Japanese apple rust
  • Japanese rust of apple

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)

Risk Ratings and Current Mitigations

Unmitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 3
Impact [1 - 5] 3
Value at Risk [1 - 5] 4
Likelihood x Impact [1 - 25] 9
UK Relative Risk Rating [1 - 125] 36

Current Mitigations

  • show / hide

Key mitigation for pest

Regulated quarantine pest



Industry Scheme

Contingency Plan



Mitigated Risks

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

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country / Territory Status Notes
United Kingdom Absent
North America
Canada Present
United States Present
Russia Unknown
China Present
Japan Present
South Korea Present

Type of Pest

  • Fungus

Host or Industry at Risk

  • show / hide

Malus, and Juniperus

Major Hosts

  • Juniperus chinensis L.
  • Juniperus chinensis var. procumbens L.
  • Juniperus chinensis var. sargentii L.
  • Juniperus squamata Buch.-Ham. Ex Lamb./D.Don
  • Malus Mill.
  • Malus baccata (Linnaeus) Borkhausen
  • Malus domestica Borkhausen
  • Malus halliana Koehne
  • Malus prunifolia var. prunifolia (Willd.) Borkh.
  • Malus pumila Mill.
  • Malus toringo var. toringo (Sieb.) Sieb. Ex De Vriese

Threats to Protected Cultivation

  • Both protected crops and outdoor production

Forest Tree Pests and Pathogens

  • Broadleaved & Coniferous

Further Information

PRA Availability

PRA not available

Regulation and EPPO listing

  • show / hide

Regulated quarantine pest (as Gymnosporangium spp.). EPPO A1.

Actions Indicated

  • show / hide


Statutory action against findings

General Comments

A fungal pest mainly of apple and juniper, present in Asia and North America. Prohibitions and controls on the import of hosts from the countries of origin mitigates the risk.

Further Information


  • show / hide

Key uncertainty for pest

Taxonomy of previous interceptions of related species.


Current distribution






UK distribution

Risk Records for this Pest