Chalara dieback of ash is a serious disease of ash trees caused by a fungus called Chalara fraxinea. It has been brought into this country through the import of infected young trees. 

Ash Die-back Disease is being treated as a quarantine pest under national emergency measures, and it is important that suspected cases of the disease are reported to the Forestry Commission or FERA (Food and Environment Research Agency) / DEFRA Department for Environment, Food & Rural Affairs).

If you think you may have an infected tree, contact a qualified tree surgeon who can advise you.

The Forestry Commission website provides detailed information on Chalara fraxinea under the following headings:

  • Description
  • Outbreak stage
  • Symptoms
  • Reporting suspect cases - 08459 33 55 77 (open 8am - 6pm every day)
  • The disease
  • Origin
  • Import and movement restriction.

The website address is

DEFRA have produced a management plan detailing the response to Ash Chalara which updates their interim control plan that was published on the 6 December 2012. This can be viewed here:

Newcastle City Council are remaining vigilant with regard to its own tree stock and urge private landowners and the public to do the same.

Page last updated: 
21 March 2014
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