Last modified: April 20, 2020, 7:25 p.m.
Still a rare species in Belgium, but locally sometimes very common.
The caterpillar lives in a silken case witch can be 5,5–6 mm long. The mouth angle is 10°–15°.
See also bladmineerders.be.
The eggs are oviposited on the flowers of the host plant.
Caterpillars are to be found in June and July. Most often they live in leaf litter feeding on the fallen seeds. Therefore they are difficult to find.
Pupation takes place in April of May.
It's one of the earliest Coleophora flyers in Belgium and the adults fly onwards from late April towards the middle of June.