Phytophthora ramorum The current position of Ramorum Dieback disease and Sudden Oak Death disease

摘要

A history of recent spread of the disease in the UK and western United States and its current status. Fungal species in the genus Phytophthora include major plant' pathogens of long standing, eg Phytophthora infestans causing potato blight and P. cambivora and P. cinnamoni causing ink disease of Sweet chestnut, and damaging or killing a wide range of other forest tree species (Brasier 1999) In the 1990s, slow crown die-back of oak was recognised in the UK and southern and western Europe as associatedwith P. cinnamoni (Gibbs & Greig 1997). More recently, a 'hybrid swarm' of Phytophthora cambivora and a species described as 'near P. fragariae' has been found to be the cause of widespread death and die-back of Alder species in the UK and Europe, especially Alnus glutinosa (Gibbs et al., 2003).