Last modified: Feb. 18, 2020, 9:59 a.m.
A very rare species in Belgium, probably overlooked.
Egg on underside of the leaf.
The mine starts as a long gallery allmost comlpetely filled with black frass. abruptly it changes to a large round blotch with black frass concentrated in the middle of the mine.
See also bladmineerders.be
It pupates in a orange to pale yellow cocoon inside the mine.
The adults fly in one extended generation a year; onwards from late April until August.
The larve feeds on Vaccinium vitis-idaea.