The outbreak map identifies areas with currently confirmed or suspected infection. The red dots indicate larch woodland sites where infection by P. ramorum has been confirmed or presumed since April 2011. The blue dots indicate larch woodland sites where infection by P. ramorum had been confirmed or presumed before April 2011. We are still establishing the extent of the disease through surveys, so additional sites added to the map in the next few weeks do not necessarily indicate a fresh spread of the disease, but simply a reflection of our improving knowledge of existing distribution.
The risk zones map identifies the three zones into which the UK has been divided according to the risk of P. ramorum infection. It shows how, on the basis of scientific advice, the UK has been divided into three risk zones, with Zone 1 being at greatest risk from P. ramorum infection, and Zone 3 being at least risk.
Different regulations governing felling and replanting trees apply according to the risk zone in which the site is located.
- For England these are explained in Operations Note 23: Processing of Felling Licence Applications Involving Larch Species during winter.
- For Scotland they are explained in the Felling Licences pages of the Forestry Commission Scotland website.
Follow Forestry Commission tree pest developments at www.twitter.com/treepestnews
