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Pests and diseases

Acute oak decline

Affects mature oak trees across the UK. Thought to be caused by a bacterium causing oozing of dark fluid from cracks in the bark.

Pests and diseases

Citrus Longhorn Beetle

A non-native pest which is extremely damaging to a wide range of broadleaved trees and shrubs.

Pests and diseases

Horse Chestnut Leaf Miner

First observed in Macedonia and now widespread across Europe, the larvae of the horse chestnut leaf miner bores within the leaves.

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Host of the month - Lawson cypress

Kicking off our host of the month initiative for 2026, Matt Parratt takes a look at Lawson cypress (Cupressus lawsoniana) and Phytophthora lateralis.

Matt Parratt  •  22 Jan 2026