Pests and diseases

 

Phytophthora ramorum

Phytophthora ramorum, the pathogen causing disease in oaks on the west coast of America, was first discovered in Britain in April 2002. In October 2003, it was found in a southern red oak tree (Quercus falcata) growing in south-east England.  There have since been a number of further findings on several other oak species as well as ash, European beech, horse chestnut, sweet chestnut, sycamore and winter's bark. has been discovered in trees in Britain.  View details.  A summary of over 1000 sites was carried out to determine whether the disease is established in our woodland environment and subsequent surveys have been carried out in 2005 and 2006.  To see copies of the reports

The Plant Health (Forestry)(Phytophthora ramorum)(Great Britain) Order 2004 (Statutory Instrument 2004 No 3213) which came into effect on 29th December 2004, imposes controls on imports of host trees, plants, wood and bark from the USA to prevent further introductions and prohibits the introduction into and spread of P. ramorum within Great Britain.  To see Statutory Instrument 2004/3213.

• Phytophthora Ramorum
   
• Phytophthora kernovii
   

To view our information note (PHL9A) about the abandonment of the D micans protected zone w.e. from 15/5/05.

To view our guide on control techniques for Dendroctonus micans.