Dawn's Journal

By DawnP

The Gall of It

As I wandered round the woodland on Sunday, I found these acorns with what looked like a firework exploding out of the cup. An internet search yielded the information that this is a Knopper Gall, caused by a gall wasp which lays its eggs in developing acorns. These cause a chemically induced distortion which is fortunately not harmful to the tree, but obviously causes a failure in germination of the acorn. The infestation first appeared in the UK in the 1970s.

They make for an interesting entry for today’s Tiny Tuesday challenge.

Sign in or get an account to comment.