Search Observatree
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Identifying bleeds on a tree part 1 - Introduction
Video • 00:06:08
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Bronze birch borer training video
Video • 00:21:03
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Mountain ash ringspot - diagram of associated virus
External link
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Emerald ash borer distribution
External link
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Acute oak decline detailed information
External link
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Recording the location of a tree
Video • 00:19:32
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Elm zig zag sawfly poster
PDF • 2.14 MB
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Blog
No sting in this tale
Find out about how Observatree volunteer, Amanda, made a big difference to the UK's oriental chestnut gall wasp outbreak response.
Amanda Yorweth • 23 Jul 2015
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Blog
Oriental chestnut gall wasp – an update
What has happened with OCGW in the UK since it was first found in 2015?
Chris Malumphy • 27 Jun 2018
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Blog
Citizen science and tree health in the UK
Our Lead Volunteer for the West Midlands, Andy Gordon, covers how citizen scientists have contributed to tree health in the UK.
Andy Gordon • 13 Feb 2019