Search Observatree
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Pests and diseases
Beech Leaf Disease
Beech leaf disease is a newly described disease causing discolouration of beech leaves.
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About us
What does Observatree do?
Our aim is to protect the UK’s trees, woods and forests from new and introduced pests and diseases.
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Blog
Sentinels – A vital tree network
For National Tree Week, we asked our volunteers to send in some examples of their favourite sentinel trees - Vicky Bolton, the Citizen Science Officer for Observatree, highlights some of their top picks.
Vicky Bolton • 04 Dec 2025
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Blog
The State of the UK’s Oaks
Professor Melanie Smith talks us through Action Oak's recent report on the state of the UK's precious oak trees.
Professor Melanie Smith • 07 May 2026
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Host of the Month: Birch and Bronze Birch Borer - March 2026
PDF • 1.25 MB
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About us
About us
Summary
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Sweet chestnut blight - Import and movement controls
External link
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Chalara screening for resistence trials
External link
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Resource Library
Expenses
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About us
International Collaborations
Pests and diseases do not respect international borders.