Thread: Strange growths on acorns
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Old 28-09-2008, 03:35 PM posted to uk.rec.gardening
Mike Derby[_2_] Mike Derby[_2_] is offline
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Default Strange growths on acorns

"Malcolm H" wrote in a message:
Please see these pictures:

http://picasaweb.google.co.uk/mphear...99535032005154

We have several oak trees in our neighbourhood, where we have lived for
over 30 years, and the first time we have noticed that some ( about 5-10%)
of the fallen acorns have these growths.

Please can anybody explain what they are?
---
Good photos, they're Knopper Galls. Gall wasps are the culprits.
Google the RHS advice pages and read all about them.

MD


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