Phytophthora pseudosyringae

 

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Publication Date

Thu, 30 Jun 2022, 14:54

Last Updated

June 30, 2022, 2:54 p.m.

Report Number

GBR-16/2

Country

United Kingdom

Pest Id

Phytophthora pseudosyringae - (PHYTPS)

Report Status

Final

Hosts

Vaccinium myrtillus, Fagus sylvatica, Carpinus betulus, Nothofagus procera

Pest Status (old values from ISPM 8 -1998 )

• Present: at low prevalence

Pest Status (ISPM 8 - 2021)

• Present: at low prevalence

Geographical Distribution

Various natural habitat sites in England, Wales and Scotland.

Summary

In January 2009 bilberry plants in woodland in Staffordshire were observed with symptoms of stem dieback, with some plants already dead. It was suspected initially that the plants were infected with Phytophthora ramorum or Phytophthora kernoviae, however, testing has confirmed that the plants were infected with Phytophthora pseudosyringae. In May 2009, symptoms were also found on bilberry plants in a woodland in the south-west of England, which have also been confirmed as infected with P. pseudosyringae. These are the first known reports of P. pseudosyringae on V. myrtillus. In 2007 Forest Research reported findings of P. pseudosyringae on two mature trees of European beech (Fagus sylvatica) and one mature hornbeam (Carpinus betulus) in south Wales. Sampled in 2005, these trees exhibited stem symptoms including bleeding cankers and lesions on the root flares. The trees were originally suspected to be infected with P. ramorum. These were the first records of P. pseudosyringae in the UK and the first record on hornbeam. In 2009, Forest Research identified P. pseudosyringae as the cause of bleeding cankers on Nothofagus procera in Cornwall, another new tree host.

Danger

First finding of Phytophthora pseudosyringae on Vaccinium myrtillus (bilberry) in UK. Earlier findings on tree species. Pest Risk Analysis completed and recommended no statutory action. Voluntary non-statutory action is undertaken by landowners as appropriate.

Report files

Website

http://www.fera.defra.gov.uk/plants/plantHealth/pestsDiseases/praTableNew.cfm#pseudosyringae

Issue keywords

Commodity keywords