Pest spread prompts warning of threat to ancient trees

Britain may be under increasing risk of invasion from new pests on veteran trees, an expert in tree health has warned.

Among more recent threats was Chalara disease of ash (Hymenoscyphus pseudoalbidus), according to consultant, writer and lecturer David Lonsdale.

This may not yet be in Britain, he told a recent seminar at Barcham Trees. But incidence of branch dieback of ancient ash pollards north of the UK was moving both south and west, he added.

Meanwhile, Phytophthora lateralis, found for the first time in Britain on Lawson cypress at Balloch Country Park in West Dunbartonshire, was also known to attack the Pacific yew (Taxus brevifolia). This was a close relative of the common yew (Taxus baccata), which could become a potential target.

Lonsdale flagged up other pests, including chronic oak decline and oak mildew. Ceratocystis fimbriata f. platani, a vascular wilt disease, presented a serious threat to some of the earliest planes.

American sweet chestnut (Castanea dentate) had been devastated by chestnut blight (Cryphonectrica parasitica), a fungus.

Once trees were attacked, they often died quickly. "We do not want this in the UK", Lonsdale warned.


Have you registered with us yet?

Register now to enjoy more articles and free email bulletins

Sign up now
Already registered?
Sign in

Read These Next

What do the latest developments in petrol and battery-powered chainsaws have to offer?

What do the latest developments in petrol and battery-powered chainsaws have to offer?

Manufacturers are improving battery and petrol models, with sales on the rise year on year, writes Sally Drury.

Horticulture careers - plugging the skills gap

Horticulture careers - plugging the skills gap

Bespoke apprenticeships and internal training are helping firms to get ahead in skills-shortage horticulture, says Rachel Anderson.

Business planning - managing insurance

Business planning - managing insurance

Follow these steps to ensure adequate cover and the best deal when reviewing your insurance, Neville Stein advises.


Follow us on:
  • Facebook
  • LinkedIn
  • Twitter
  • Google +

HORTICULTURE WEEK BUSINESS Awards 2019

The Horticulture Week Business Awards is now open for entries

Horticulture Jobs
More Horticulture Jobs

BUSINESS LEADs

Build your business with the latest public sector tenders covering landscape, arboriculture, grounds care, production and kit supplies. To receive the latest tenders weekly to your inbox sign up for our Tenders Tracker bulletin here.

HW Top UK Arboriculture Businesses

See our exclusive RANKING of arboriculture businesses by annual turnover. 

HORTICULTURE WEEK Custodian Awards

Find out more about the outstanding parks, gardens and arboricultural projects and teams that became our Custodian Award 2018 winners.

Jeremy Barrell On...

Jeremy Barrell

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

Products & Kit Resources