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Thousands of trees to be felled as climate change helps diseases spread

Ash and larch trees have been hard hit by the spread of diseases exacerbated by climate change

Samuel Webb
Thursday 09 December 2021 14:38 GMT
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Ash trees being felled at Hardcastle Crags, west Yorkshire
Ash trees being felled at Hardcastle Crags, west Yorkshire (Woodland Trust)

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Large areas of woodland will be lost this winter because of tree diseases, The National Trust has said.

At least 30,000 ash trees are expected to be felled at a cost of £3m (up from £2m last year) because of ash dieback.

The National Trust said changing weather patterns means it is seeing the “worst effects” of tree diseases.

Ash dieback, caused by a fungus called Hymenoscyphus fraxineus, originated in Asia and spread to Europe via the global plant trade.

With its windborne spores, the fungus spreads quickly, causing leaf loss, bark lesions and dieback in the crown of the tree, where the branches emerge from the trunk.

And tens of thousands of larch trees will also be felled across the Lake District after an outbreak of the disease Phytophthora ramorum, a fungal-like organism that causes the death of a wide range of trees and shrubs. Urgent felling will take place at several sites, with Holme Wood among the worst affected by the disease.

A National Trust spokesperson said: “Changing weather patterns caused by climate change mean we’re seeing the worst effects of ash dieback and other diseases at the places in our care.

“Mild, wet winters create ideal conditions for disease and pests to spread. Prolonged drought, flooding and high temperatures also mean that the trees are likely to be stressed and more vulnerable to disease.”

Woodlands in the South Lakes have been badly hit, including Tarn Hows and Coniston. Wasdale, Langdale, and Crummock have also been affected.

A new disease Phytophthora pluvialis – discovered in Cornwall – and an outbreak of the eight-toothed spruce bark beetle in the southeast of England have also raised concerns.

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