UK Risk Register Details for Coleosporium asterum

Common Names

  • Needle cast: red pine
  • Rust: aster
  • Rust: Solidago spp.

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)
  • Cut flowers or branches

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] 3
Spread [1 - 5] 5
Impact [1 - 5] 2
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 30

Current Mitigations

  • show / hide

Key mitigation for pest

EU regulated in derogation for bonsai imports



Industry Scheme

Contingency Plan



Mitigated Risks

Likelihood [1 - 5] 3
Spread [1 - 5] 5
Impact [1 - 5] 2
Value at Risk [1 - 5] 5
Likelihood x Impact [1 - 25] 6
UK Relative Risk Rating [1 - 125] 30

Proposed Actions

Proposed Actions



Management By Industry

Targeted Survey


Contingency Plan



Distribution and Pest Details


Country Status Notes
United Kingdom Absent
Russia Present
Turkey Present
North America
Bermuda Present
Canada Present
Mexico Present
United States Present
South America
Brazil Present
Colombia Present
Africa See Notes Records for Africa are tentative
Kenya Present
Zambia Present
Zimbabwe Present
Asia Present
China Present
India Present
Japan Present
South Korea Present
Taiwan Present

Type of Pest

  • Fungus

Host or Industry at Risk

  • show / hide


Major Hosts

  • Aster L.
  • Callistephus Cass.
  • Erigeron L.
  • Grindelia Willd.
  • Haplopappus Cass. Corr. Endl.
  • Heterotheca Cass.
  • Launaea sarmentosa (Willd.) Sch.Bip. Ex O.Kuntze
  • Machaeranthera Nees
  • Pinus banksiana Lamb.
  • Pinus contorta Dougl. Ex Loud.
  • Pinus echinata Mill.
  • Pinus mugo ssp. mugo Turra
  • Pinus nigra ssp. nigra Arn.
  • Pinus ponderosa Dougl. Ex P. & C.Laws.
  • Pinus pungens Lamb.
  • Pinus resinosa Ait./Soland.
  • Pinus rigida Mill.
  • Pinus sylvestris Linnaeus
  • Pinus taeda L.
  • Pinus thunbergii Parl.
  • Pinus virginiana Mill.
  • Solidago L.
  • Solidaster (x Solidaster) Wehrh.

Threats to Protected Cultivation

Forest Tree Pests and Pathogens

  • Coniferous

Further Information

PRA Availability

UK (2005), UK (2014)

EU and EPPO Listing

Commission Decision 2002/499/EC

Actions Indicated

  • show / hide


No statutory action to be taken against findings on cut flowers. Need to review bonsai derogation.

General Comments

Dioecious rust of which the main host is prohibited, which provides some mitigation of the risk. If introduced is unlikely to be more damaging than native rusts, and current control methods are likely to help.

Risk Records for this Pest