Tools and Resources
We use some essential cookies to make this website work.
We’d like to set additional cookies to understand how you use forestresearch.gov.uk, remember your settings and improve our services.
We also use cookies set by other sites to help us deliver content from their services.
The NFI programme works in collaboration with colleagues to provide information on the extent and impact of events such as outbreaks of pests and diseases or natural events such as storms. NFI involvement will be tailored to meet the requirements of the specific event.
This page has information on:
Following the St. Jude’s day storm on 28 October 2013, the National Forest Inventory (NFI) conducted a sample survey to assess the extent of damage to woodlands in the impacted areas. The area of coverage of the survey was decided from initial reports of areas that had reportedly experienced damage from high winds during the storm.
Hymenoscyphus fraxineus, the fungus which causes Chalara ash dieback on ash trees, was found to be infecting ash trees in Great Britain, and in nursery stock, during 2012. It was therefore decided to resurvey a sub-sample of NFI survey sites that had previously been surveyed in the NFI field survey programme, in order to establish an estimate of the then-current incidence of the disease in the ash population.
The first document below reports the results and findings of this resurvey. The information provided is intended to complement the results of other recent work that has investigated the pattern and current extent of H. fraxineus infections of ash trees in Great Britain.
H. fraxineus was formerly known as Chalara fraxinea, and the reports below were written before the name change.
Last updated: 8th June 2017
Cookies are files saved on your phone, tablet or computer when you visit a website.
We use cookies to store information about how you use the dwi.gov.uk website, such as the pages you visit.
Find out more about cookies on forestresearch.gov.uk
We use 3 types of cookie. You can choose which cookies you're happy for us to use.
These essential cookies do things like remember your progress through a form. They always need to be on.
We use Google Analytics to measure how you use the website so we can improve it based on user needs. Google Analytics sets cookies that store anonymised information about: how you got to the site the pages you visit on forestresearch.gov.uk and how long you spend on each page what you click on while you're visiting the site
Some forestresearch.gov.uk pages may contain content from other sites, like YouTube or Flickr, which may set their own cookies. These sites are sometimes called ‘third party’ services. This tells us how many people are seeing the content and whether it’s useful.