Search Observatree
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Blog
10 highlights from the past 10 years of Observatree
Professor Nicola Spence, Chief Plant Health Office at Defra, reflects on 10 achievements and successes from the first 10 years of the ground-breaking Observatree initiative.
Nicola Spence • 01 Oct 2023
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Blog
Pine Processionary Moth: Assessing the threat
PPM are spreading further north across Europe but are not established in the UK. We discuss the signs and symptoms to look out for.
Fritha West • 31 Mar 2022
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Blog
State of the World’s Plants
I had the pleasure of attending a ‘State of the World’s Plants’ symposium in May at Royal Botanic Gardens, Kew.
Charles Lane • 14 Aug 2017
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Pests and diseases
Pests and diseases by tree species
To make it easier for you to spot tree pests and diseases, we have listed our 22 priorties by main host tree species.
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Pests and diseases
Great Spruce Bark Beetle
Accidentally introduced to the UK in 1982, the great spruce bark beetle damages spruce trees by tunneling into their bark.
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Pests and diseases
Elm Zigzag Sawfly
Elm zigzag sawfly larvae can defoliate whole elm trees leaving them vulnerable to further attack.
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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.
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Oak processionary moth ID information
External link
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Blog
On the trail of Sirococcus tsugae
Lead Volunteer, Andy Gordon, lets us know about his experience of surveying for Sirococcus tsugae.
Andy Gordon • 14 Aug 2018
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Pests and diseases
Beech Leaf Disease
Beech leaf disease is a newly described disease causing discolouration of beech leaves.