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Cherry Gall

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A spherical gall that forms on oak leaves caused by the egg laying of a species of gall wasp


 

 

Cherry Gall: the rough with the smooth

Post date: Wednesday, 14 January, 2015 - 00:00

The cherry gall (Cynips quercusfolii) is the product of the egg laying of a small species of gall wasp. It lays its eggs on the underside of oak (quercus) foliage (folii) and they develop there, sometimes one, sometimes a small collection. They start pale green (like the one I photographed) and become red as they mature and that is when they begin to look like cherries.

As with similar galls a single 'fruit' has several chambers in it, each with a single larva. When the leaf falls, so too does the gall and the larvae eat their way out and live over winter in the leaf litter before laying eggs in the spring.

It is interesting that galls on our common English or pedunculate oak are usually smooth but those laid on the introduced sessile oak are rough or warty; I guess that must be something different in the chemistry of the two species of oak?


 

The records for this species have been organised into reports, charts, maps and photos. Click a pic below to see the detail:

Sites List Distribution Map Distribution Map Some Charts Some Photographs Original Tweets Relatives Guidance Notes
Common Name Cherry Gall
Scientific Name Cynips quercusfolii
Interest Level
2
Species Family Galls and Deformities
Preferred Environment
Look for
Additional Identification Notes