• Pest is introduced

• Plants for planting (except seeds bulbs and tubers)

• Plants for planting (except seeds bulbs and tubers)
• Cut flowers or branches

× Likelihood For "Pest is Introduced" the lowest value of Entry or Establishment, as both are required for a successful introduction. For "Pest Spreads to Maximum Extent" this is an expert judgement on the likelihood of this occurrence. See Guidance Document for more Information Close Likelihood [1 - 5]			3
× Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Close Spread [1 - 5]			3
× Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Close Impact [1 - 5]					5
× Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Close Value at Risk [1 - 5]					5
× Likelihood x Impact The likelihood multiplied by the impact, which shows the risk to the sector. See Guidance Document for more Information Close Likelihood x Impact [1 - 25]	15
× UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information Close UK Relative Risk Rating [1 - 125]	75

Key mitigation for pest

Regulated quarantine pest and prohibition of key pathway

Regulation

Surveillance

Industry Scheme

Contingency Plan

Awareness

Research

× Likelihood For "Pest is Introduced" the lowest value of Entry or Establishment, as both are required for a successful introduction. For "Pest Spreads to Maximum Extent" this is an expert judgement on the likelihood of this occurrence. See Guidance Document for more Information Close Likelihood [1 - 5]	1
× Spread The rate at which a pest can expand, by natural dispersal only, within an area. See Guidance Document for more Information Close Spread [1 - 5]			3
× Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Close Impact [1 - 5]					5
× Value at Risk The value of the hosts or industries at risk from this pest in the UK. See Guidance Document for more Information Close Value at Risk [1 - 5]					5
× Likelihood x Impact The likelihood multiplied by the impact, which shows the risk to the sector. See Guidance Document for more Information Close Likelihood x Impact [1 - 25]	5
× UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information Close UK Relative Risk Rating [1 - 125]	25

Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Country / Territory			Status			Notes
Europe
	United Kingdom		Absent
North America
	United States		Present

• Insect (Lepidoptera)

Quercus

• Quercus L.
• Quercus alba L.
• Quercus coccinea Muenchh.
• Quercus palustris Muenchh./Du Roi
• Quercus rubra L.
• Quercus velutina Lam.
• Rosa L.

• N/A

• Broadleaved

PRA Availability

PRA not available

Regulated quarantine pest

Action

Statutory action against findings.

General Comments

North American moth pest, mainly affecting species of oak. In outbreak years, high levels of defoliation and some tree death has been reported. Effectively mitigated by current regulations prohibiting imports of the hosts from the country of origin.

Key uncertainty for pest

Rapid addition via a workshop. Some areas of assessment may require more research.

Climate

Current distribution

Hosts

Impact

Pathways

Regulation

Taxonomy

UK distribution