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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

Blog

On the Road with Observatree: Science Day Highlights

Ever wondered what happens after you submit a TreeAlert report? This Autumn at our Science Day events, our volunteers got an exclusive peek behind the scenes - and the discoveries were fascinating! Vicky Bolton, the Citizen Science Officer for Observatree, summarises the highlights for us.  

Vicky Bolton  •  13 Nov 2025

Blog

Host of the month - Sweet chestnut

Matt Parratt takes a look at Sweet chestnuts, and explains their issues with Oriental chestnut gall wasp, and Sweet chestnut blight.

Matt Parratt  •  16 Oct 2025

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

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

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

Pests and diseases

Red-necked Longhorn Beetle

The red-necked longhorn beetle larvae tunnel and feed under the bark of trees in the Prunus genus, such as cherries and plums.

Blog

Out with the old and in with the new: Welcome to Observatree

In 2017, Observatree produced more educational resources, ran successful media campaigns, trained stakeholders and volunteers across the county, attended events, held a volunteer celebration event and hosted a conference.

Peter Crow  •  07 Jan 2018

Blog

How does Observatree fit into tree disease?

Observatree project is asking citizens to help in protecting our trees from new pests and diseases, but why is this an issue and why is citizen science part of the answer?

Joan Webber  •  06 May 2015