First discovered in London, 2002 and has since spread substantially.
First Norfolk record of several million mines on Holm Oak at Thetford. (Lee Gregory, 03/04/11)
"The trees were totally infested and it was a job to find a leaf without mines and most leaves having 5+ mines! "
Leaf-mine: Nov - April - A contorted gallery mine with usually several mines in one leaf.
Verification Grade Comment: Adults must be reared and/or Gen. Det. to confirm.
|Determination by Genitalia Examination (gen. det.) Required|
|Mine: Either the leaf or a good photograph required |
Recorded in 43 (58%) of 74 10k Squares.
First Recorded in 2011.
Last Recorded in 2021.