Virulent root disease threatens trees in Britain for first time

Phytophthora lateralis has been found for the first time in Britain on a Lawson's cypress tree at Balloch Castle Country Park, on the banks of Loch Lomond.

Forestry Commission scientists identified the pathogen and are testing samples from the other 80 Lawson's cypress trees in the park showing similar symptoms. They are also investigating 27 dead and dying yew trees.

Forestry Commission Scotland director Dr Bob McIntosh said: "This is a very worrying development. P. lateralis is a particularly virulent pathogen and very few trees survive an attack.

"Although its main victim is Lawson's cypress, it can kill other species, particularly the Pacific yew, which is a close relative of our native English yew. It could also be very serious for the ornamental plant industry because Lawson's cypress are some of the most important conifers in our ornamental trade."

He added: "We are working closely with West Dunbartonshire Council to fell and destroy the dead and dying trees and to implement bio-security measures at the park to minimise the risk of spreading the disease."

Councillor Jim McElhill said: "The council's park staff will place disinfectant mats at exit points from the park and public notices are also being displayed to inform visitors of the infection and encourage them to observe sensible bio-security measures."

P. lateralis is predominantly found in the western states of Canada and the USA, but outbreaks were recently recorded in France and the Netherlands. Symptoms include foliage appearing lighter in colour before withering and turning red/brown and tongues of killed inner bark becoming visibly darker.

Any sightings should be reported to the Forestry Commission's disease diagnostic and advisory service on 01314 452176.

Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Before commenting please read our rules for commenting on articles.

If you see a comment you find offensive, you can flag it as inappropriate. In the top right-hand corner of an individual comment, you will see 'flag as inappropriate'. Clicking this prompts us to review the comment. For further information see our rules for commenting on articles.

comments powered by Disqus

Read These Next

Horticulture education update - staying on course

Horticulture education update - staying on course

Raised levels of investment in horticulture education and increased student take-up is welcome news for the industry, says Rachel Anderson.

Tree planting guide - three basic rules

Tree planting guide - three basic rules

Choosing the right plant, correct planting procedure and best aftercare are the three basic rules for sucessful tree planting, Sally Drury explains.

Tree planting - what are the benefits of planting trees?

Tree planting - what are the benefits of planting trees?

Mitigating climate change, providing windbreaks and reducing the risk of soil erosion are some of the best reasons for planting trees, says Sally Drury.

Follow us on:
  • Facebook
  • LinkedIn
  • Twitter
  • Google +
Horticulture Jobs
More Horticulture Jobs

Arboriculture Contracts & Tenders

Jeremy Barrell On...

Jeremy Barrell

Tree consultant Jeremy Barrell reflects on the big issues in arboriculture.

Products & Kit Resources