Pest & Disease Alert - Multiple Phytophthora outbreaks in Scotland

Scotland was the focus for eight outbreaks of Phytopthora (ramorum and kernovaie) during late autumn, according to the latest report from FERA.

Phythophthora pathogen affecting rhododendron  - image: Forestry Commission
Phythophthora pathogen affecting rhododendron - image: Forestry Commission
Rhododendron 'Delta', 'Scintillation', ponticum and a another 'hybrid' variety were found to be infected with Phytophthora ramorum across six sites. On two of those sites, specimens of Pieris formosa var. forrestii 'Wakehurst' AGM and another Pieris of an unspecified variety were also affected.

All plants were destroyed.

Phytophthora kernovaie was discovered on a further two sites on Rhododendrum ponticum and a 'hybrid' form.

Forestry Commission Scotland has responded to a heightened risk of widespread Phytophthora infection with an ambitious strategy to rid Scotland's forests of Rhododendron ponticum over the next 15 years.

For more information on the Phythophthora pathogen see the following Pest and Disease Factsheets:

Phytophthora root rots

Phytophthora lateralis

Phytophthora ramorum

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