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Blog
The Alder Leaf Beetle - Agelastica alni
In this blog article John Pitcairn, who has been volunteering with Observatree for 6 years, shares with us his observations of the Alder Leaf Beetle.
John Pitcairn • 05 Sep 2024
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Host of the Month: Acer and Longhorn Beetle - October 2024
PDF • 1.47 MB
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Spruce and Great Spruce Bark Beetle - January 2025
PDF • 1.32 MB
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Host of the Month: Lawson Cypress and Phytophthora lateralis - February 2025
PDF • 955 KB
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Acute oak decline detailed information
External link
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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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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
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