Last modified: Jan. 29, 2020, 9:54 a.m.
A rare species throughout Belgium, more distributed in the northern part of the country.
Full grown larvae live in a slender greyish white three-valved tubular silken case of 8 mm. The mouth angle is about 45°.
See also bladmineerders.be.
The larva, while feeding, creates little white fleck mines.
Full grown cases in May.
Often several cases together on a small number of plants.
Pupation in the case attached to a stem of the food plant, vegetation or tree trunks.
It has not been recorded at light.
The adults fly in one generation a year, from late May till the end of July.