• Pest spreads to maximum extent

• Plants for planting (except seeds bulbs and tubers)

• Plants for planting (except seeds bulbs and tubers)

× 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]				4
× 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]		2
× Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Close Impact [1 - 5]			3
× 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]		2
× 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]	12
× UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information Close UK Relative Risk Rating [1 - 125]	24

Key mitigation for pest

Regulated non quarantine pest

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]		2
× 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]		2
× Impact The highest value from economic, environmental or social impacts. See Guidance Document for more Information Close Impact [1 - 5]			3
× 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]		2
× 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]	6
× UK Relative Risk Rating Likelihood x Impact x Value at Risk. See Guidance Document for more Information Close UK Relative Risk Rating [1 - 125]	12

Regulation

Deregulation

Management By Industry

Targeted Survey

PRA

Contingency Plan

Publicity

Research

Country / Territory			Status			Notes
Europe
	United Kingdom		Present (Unknown Distribution)			Hop strains are present (limited)
	Belgium		Present
	Germany		Present
	Luxembourg		Present
	Poland		Present
	Russia		Present
	Slovakia		Present
	Slovenia		Present
North America
	United States		Present
	Canada		Present
Oceania
	New Zealand		Present
Asia
	Russia		Present
	China		Present

• Fungus

Humulus lupulus

• Acer pensylvanicum L.
• Actinidia Lindl.
• Ailanthus altissima (Mill.) Swingle
• Aralia spinosa L.
• Ceanothus integerrimus Hook. & Arn.
• Humulus lupulus L.
• Solanum tuberosum L.
• Spinacia oleracea L.
• Solanaceae (family)

• Both protected crops and outdoor production

• Broadleaved

PRA Availability

PRA not available

Regulated non quarantine pest

Action

Statutory action in line with legislation

General Comments

Fungal pathogen affecting hops and other plants. This species used to be regarded as a strain of Verticillium albo-atrum, which was regulated in the 1980s and 1990s on hops.

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