Last modified: Jan. 5, 2020, 6:24 p.m.
A very rare and seldom recorded species in Belgium.
One of the largest species of this family in BE. Wingspan is 14–20 mm. The forewings have a lot of broad ochreous stripes and a lot of small blackish dots. The antennae are not so clearly ringed.
The case is light yellow with dark longitudinal lines. It is tubular tri-valval and about 12 mm long. The mouth angle is 40°.
See also bladmineerders.be.
Full-grown larvae in June–July. During autumn they feed on the ripening seeds, after the winter they make blotch mines in the lower leaves. That is where the pupation takes place.
The adults are on the wing from the end of May till the beginning of July.
Mostly in the dunes, but also in dry sandy areas where the foodplant occurs.