acute oak decline
(Phytophthora quercina)
A syndrome leading to the decline of native oaks which can lead to death within 4-5 years. AOD is thought to have arisen in the 1920s but appears to have become more prevalent in the last few decades. Most reports are from the midlands and south-east of England.
This definition is abridged from A – Z of tree terms: A companion to British arboriculture.
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