Last modified: June 17, 2024, 12:17 p.m.
An uncommon species throughout Belgium.
Native
It lives in a silken case that is enclosed in one, later several, mostly three, emptied pods.
See also bladmineerders.be.
The eggs are deposited on a flower of the food plant. The final case is about 9 mm with a mouth angle of 70°. The larvae live from July till early September. They mostly overwinter at ground level.
Pupation takes place after the winter, still in the case.
The adults can be seen flying or running up and down the stem during the day.
The adults fly in one generation a year from May to July.
The larva feeds on Melilotus officinalis, Melilotus altissima, Melilotus alba, and Melilotus elegans.