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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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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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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
Asian Longhorn Beetle
Native to Eastern China, Japan and Korea, this beetle can infest a wide variety of trees with beetles emerging from spring onwards.
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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
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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Tree health
Report a tree pest or disease
Spotted a tree pest or disease? Report it as quickly as you can.
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Blog
The science behind Observatree
As part of the ongoing ten-year celebrations, Peter Crow, Observatree's project manager, looks at the power of combining citizens and science.
Peter Crow • 25 Oct 2023
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Pests and diseases
Sweet Chestnut Blight
Sweet chestnut blight is a fungus that grows beneath the bark of sweet chestnut trees causing cankers that can girdle the tree.