Knopper Oak Gall Wasp - Andricus quercuscalicis
Alternative names
Knopper Oak Gall
Description
A Cynipid gall wasp that causes a gall to form on the acorns of various oaks. The gall is seen more often than the adult wasp.
Habitat
On Pendunculate Oak.
When to see it
May to July.
Life History
Knopper Galls develop as a chemically induced distortion of growing acorns on Pendunculate Oak trees, caused by cynipid gall wasp Andricus quercuscalicis which lays eggs within buds using the ovipositor.
UK Status
A recent introduction to the British Isles, first arriving in the 1960s and now found throughout England, Wales and as far north as Scotland.
VC55 Status
Common in Leicestershire and Rutland.
Leicestershire & Rutland Map
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MAP KEY:
Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015