Search Observatree
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Acer and Longhorn Beetle - October 2023
PDF • 1.42 MB
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Spruce and Great Spruce Bark Beetle - January 2024
PDF • 1.32 MB
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Lawson Cypress and Phytophthora lateralis - February 2024
PDF • 953 KB
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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
Emerald Ash Borer
Native to Asia and Eastern Russia, the emerald ash borer is a threat to our already vulnerable ash trees.
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Pests and diseases
Plane Lace Bug
The plane lace bug feeds only on plane trees, laying its eggs on the underside of its leaves.
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Acute oak decline field identification guide
PDF • 4.87 MB
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Evaluating the health of a tree
Video • 00:17:50
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About us
Sue Quick
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Sweet chestnut blight - Rapid pest risk analysis
External link