Ash die back

Chalara dieback of ash is a serious disease of ash trees caused by a fungus called Chalara fraxinea (C. fraxinea). The disease causes leaf loss and crown dieback in affected trees, and it can lead to tree death.

There are no identified cases in Newark and Sherwood, but we encourage members of the public and in particular ash tree owners to be vigilant and familiarise themselves with the Forestry Commission and DEFRA websites.

C. fraxinea is being treated as a quarantine pest under national emergency measures, and it is important that suspected cases of the disease are reported.

Reporting suspected cases

The Forestry Commission welcomes reports of ash with chalara dieback symptoms from members of the public.

They do ask that you take care first to ensure that the infected tree really is an ash, because they can look like rowan (mountain ash) trees which do not get the disease.

Please also take care to ensure that the symptoms you report are chalara dieback symptoms, and not the symptoms of some other, less-serious form of dieback or diseases of ash trees. You can familiarise yourself with the symptoms with guide - Guide to the symptoms of ash die back (PDF File, 280kb)

Suspected cases should be reported to the chalara helpline: 08459 33 55 77 (open 8am - 6pm every day)

  • 01636 650000

    Mon to Fri 9am to 5pm

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    Castle House
    Great North Road
    NG24 1BY

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