Last modified: April 22, 2020, 5:12 p.m.
A very rare species in Belgium, seen for the first time in our country in 2007.
The full-grown larva lives in an almost smooth, greyish-brown, trivalved, tubular silken case of 6 mm and a mouth angle of 30°–45°.
See also bladmineerders.be.
At first, the caterpillars are mining the leaves, later on they live on the seeds.
The larvae are active from September to October. When they are full-fed, they hibernate and pupate in June–July.
The adults fly in July and August.
This species is only to be found in saltmarshes.