amantell20's picture

Gall in thistle stem

Observed: 12th August 2012 By: amantell20amantell20’s reputation in Invertebratesamantell20’s reputation in Invertebratesamantell20’s reputation in Invertebrates
DSC06520
Description:

Any ideas what might have caused this gall?

Identifications
Species interactions

No interactions present.

Species with which Urophora cardui interacts

Comments

ophrys's picture

Urophora

Probably this picture-wing fly

http://www.naturespot.org.uk/species/thistle-gall-fly

Ian
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