Phytophthora ramorum

Phytophthora ramorum , Arboriculture > Forestry , Forest Research

Forest Research

Dr Suzanne Sancisi-Frey, Forest Research

Phytophthora ramorum is an aggressive fungus-like pathogen that causes extensive
damage to a wide range of trees and shrubs. The disease affects the foliage and bark
of a number of both broadleaved and conifer trees and is particularly prevalent on
the western side of the UK where climatic conditions favour its growth and spread.
When multiple hosts occur on infected sites, symptoms of P. ramorum are likely to
occur in a variety of species. The disease is often fatal to the trees it affects and it has
had a major impact on forestry in the UK.

Forest Research

Manufactured by: Forest Research