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Blog
Negative data is good!
One of the key messages we give Observatree volunteers is that you don’t have to find something to make a survey worthwhile or valuable.
Ellie Barham • 08 Mar 2017
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Blog
Beech Leaf Disease
A new disease of beech trees (Fagus spp.) named ‘Beech leaf disease’ (BLD) is spreading through forest areas in eastern USA and Canada. Charles Lane and Tom Prior discuss the threat posed to UK woods.
Tom Prior • 14 Jul 2022
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Blog
Host of the month - Pine
Matt Parratt discusses the different types of Pine (Pinus) and Dothistroma needle blight (DNB).
Matt Parratt • 15 Jul 2024
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Blog
TreeAlert Demystified: What happens when you submit a report?
A question that the Tree Health Diagnostic and Advisory Service team are often asked is, ‘What happens when I send in a TreeAlert enquiry, how does it all work?’ Here, Chris Berman, entomology diagnostician at Forest Research, pulls back the curtain on what goes on behind the scenes!
Chris Berman • 23 Jan 2025
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Blog
Host of the month - Elm
For this month's host tree of interest, Matt Parratt focusses on Elm (Ulmus species) and Elm zigzag sawfly (Aproceros leucopoda).
Matt Parratt • 15 May 2025
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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
Oak powdery mildew – update on what’s all the fuss about?
Charles Lane gives us an update on what all the fuss is about when it comes to Oak Powdery Mildew.
Charles Lane • 22 Sep 2025
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Blog
Host of the Month - Sweet Chestnut
Matt Parratt, Observatree Scientific Coordinator, looks at sweet chestnut, Oriental chestnut gall wasp and sweet chestnut blight.
Matt Parratt • 07 Nov 2023
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Blog
Canker Stain of Plane
A summary of the damage caused by Canker Stain of Plane.
Alex Lewis • 01 May 2024