Search Observatree
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Pests and diseases
Agrilus fleischeri
Native to Asia, this beetle can infest poplar and willow trees with the beetles emerging from spring onwards.
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Blog
On the Road with Observatree: Summer Training Highlights
Following a wonderful summer season of training, Vicky Bolton, the Citizen Science Officer for Observatree, summarises some of the highlights for us.
Vicky Bolton • 14 Aug 2025
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Blog
British cedars under attack?
Recently, cedars have been considered as an alternative forestry species, learn about how Sirococcus tsugae threatens this species.
Ana Perez-Sierra • 16 Feb 2016
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Pests and diseases
Phytophthora lateralis
Discovered in the UK in 2010, Phytophthora lateralis is a fungus-like plant pathogen that attacks the roots of Lawson cypress trees.
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Blog
Host of the month - Lawson cypress
This month Matt looks at at Lawson cypress (Cupressus lawsoniana) and its associated pathogen, Phytophthora lateralis.
Matt Parratt • 22 Jan 2025
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Blog
A new collaboration as part of the UK Garden Sentinel Network
As Observatree continues to establish collaborative networks, we recently teamed up with the Botanic Gardens Conservation International (BGCI) and PlantNetwork to help raise awareness of tree health in wider audiences and promote surveillance and reporting by more people.
Peter Crow • 26 Apr 2024
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Blog
Observatree Network Groups
Observatree is a national network of volunteers surveying tree health and acting as an early warning systems for tree health in the UK. A key way our volunteers and staff keep in contact is through the network groups in our forum.
Charles Lane • 13 Jul 2020
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Blog
Host of the month - Maple
This month Matt Parratt delves into the world of Maple trees, Asian longhorn beetle and Citrus longhorn beetle.
Matt Parratt • 19 Sep 2025
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Blog
Observatree is a Constant in 2020
We could say that this year has been unusual, and we had to adapt to new ways. However, nothing has stopped Observatree volunteers keeping their eyes open and reporting pests and diseases to the Tree Health Diagnostic and Advisory Service (THDAS).
Ana Perez-Sierra • 11 Feb 2021
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Blog
Emerging pests and diseases and their suitability for citizen science surveillance
A review of new and emerging pests and diseases.
Charles Lane • 01 May 2024