BETA Your feedback will help us improve the UK Plant Health Information Portal

Pest risk analyses

Pest risk analysis (PRA) is the process of evaluating biological or other scientific and economic evidence to determine whether an organism is a pest or pathogen, if it should be regulated and to identify control measures to be taken against it.

Read more about Defra's approach to Pest risk analysis.

We welcome views and comments on the PRAs. In submitting any comments you may wish to focus on the summary, key uncertainties and conclusion sections of the risk assessment and to consider the following:

  • Are any factual corrections required?
  • Your view on the appropriateness of the current recommendation(s)?
  • Can you provide any additional information (or links to other sources of information) that may help address uncertainty identified in the assessment/management measures?
  • Are there any risks that have not been adequately considered?

Any comments should be sent by the date specified, in writing or by email to:

The Risk and Horizon Scanning team, the Department for Environment, Food and Rural Affairs Room 11G31 Sand Hutton York YO41 1LZ.


Comments received will not be attributed to individuals without permission in any published summary, but may have to be released if a request is received under the Environmental Information Regulations.

Only PRAs currently published for review are displayed on this page. A list of all pests for which a PRA is available can be accessed via the plant health portal search facility along with the current list of pests for which development of a PRA is considered a priority following addition to the risk register.  PRAs for specific pests are also accessible via their individual entry on the plant health risk register.  

List of existing PRAs

List of pests identified as a priority for development of a PRA     

Latest Pest Risk Analyses

Apple dimple fruit viroid (ADFVd)

Apple dimple fruit viroid (ADFVd)

Crop/sector considered most at risk in the UK

Malus species growing under protected cultivation and outdoors are at risk of ADFVd infection, although there are no reports of the viroid being able to infect Malus sylvestris (crab apple). As Malus species are widely grown in the wider environment, and with some grafted maiden and grafted family trees being grown under protected cultivation in the UK, the risk of establishment both outdoors and in protected cultivation was determined to be likely.




Inclusion of ADFVd into the Fruit Propagation certification Scheme (FPCS), with a DNA-based test to determine the presence of the viroid.


Comments to be submitted by

17 May 2019