Following DEFRA confirmation of the tree disease, P. pluvialis in Cumbria, England today (19 November), Scottish Forestry is to commence targeted inspections in Scotland as a precautionary measure. 

The fungus like disease has been found on western hemlock and Douglas fir, in Devon, Cornwall and now Cumbria. For more information on P. pluvialis a symptom guide has been prepared based on what has been observed in England. 

Although P. pluvialis is not known to be present in Scotland, landowners and forest managers are being asked to familiarise themselves with the symptoms of this disease and report any suspected infections through Tree Alert.  

James Nott, Head of Tree Health for Scottish Forestry said:

‘Although there have been no confirmed reports of Phytophthora pluvialis in Scotland we are taking the detection of this disease in England, particularly Cumbria very seriously. Our tree health specialists have visited an infected site in England to observe symptoms first hand and will now be undertaking targeted inspections of Douglas fir and western hemlock, primarily in the West of Scotland.’ 

“We would also like to take this opportunity to highlight what people can do to help protect woodlands and forests not only from Phytophthora pluvialis but also from a range of other pests and diseases. Visitors who enjoy the countryside can help considerably by “turning up clean”, ensuring shoes, tyres and pet paws are clean before visits, limiting the risk of spreading diseases from other areas. In addition, they can also help us greatly by reporting a potential tree pests or diseases through the website Tree Alert.” 

As the disease has never been detected in Europe, research is ongoing to understand if other potentially susceptible species could become impacted. This will help inform what control measures are appropriate and the potential impact this pathogen could have on the landscape and the forestry sector.  

Scottish Forestry will continue to work with partner agencies across the UK to share information, experience and understanding to ensure a joint approach to monitoring and managing the current situation.

Notes to Editors

1. Scottish Forestry is the Scottish Government agency responsible for forestry policy, support and regulations.
2. Forestry Commission acts on new tree disease in Cumbria - GOV.UK (www.gov.uk)
3. Mapping of Western Hemlock and Douglas Fir (2 current identified susceptible species) suggests they are widespread across Scotland in small numbers. Approximately 16,000 – 20,000 ha.
4. In 2021 Phytophthora pluvialis was confirmed in thirteen sites in England - eleven in Cornwall, one in Devon and one in Cumbria.
5. Together we can help control the spread of forest diseases. To find out more, visit Keep it Clean. 

For further information please contact Claire Martin at This email address is being protected from spambots. You need JavaScript enabled to view it..