Search Observatree
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Oriental chestnut gall wasp training video
Video • 00:15:47
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Horse chestnut leaf miner training video
Video • 00:10:45
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Phytophthora austrocedri - Pest alert
External link
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Blog
Observatree 2022 breaks all records!
Throughout the year, Observatree volunteers submitted 4899 tree health reports. Our best year to date. Not only that, volunteers also submitted the most pest and disease reports, they surveyed the most tree species in a single year and monitored the most sentinel trees.
Rebecca Gosling • 21 Mar 2023
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Video
Host of the Month Beech - July 2023
Join us to learn about Beech ID and associated pests and diseases.
00:21:25
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Blog
Host of the month - Oak
Matt Parratt, Observatree Scientific Coordinator, looks at oak (Quercus species) and acute oak decline (AOD).
Matt Parratt • 04 Apr 2024
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Pests and diseases
Acute oak decline
Affects mature oak trees across the UK. Thought to be caused by a bacterium causing oozing of dark fluid from cracks in the bark.
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Pests and diseases
Citrus Longhorn Beetle
A non-native pest which is extremely damaging to a wide range of broadleaved trees and shrubs.
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Pests and diseases
Horse Chestnut Leaf Miner
First observed in Macedonia and now widespread across Europe, the larvae of the horse chestnut leaf miner bores within the leaves.
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Step 4 - Crown signs and symptoms
Video • 00:09:29