Last modified: Dec. 9, 2024, 5:25 p.m.
An uncommon species in Belgium, mostly observed in the northern part.
Native
The yellow-brown to light grey silken case has darker length lines. The case is large, up to 17 mm, and very slender. The end is three-valved.
The mouth angle about 50°.
See also bladmineerders.be.
There are many small fleck mines made.
The eggs are deposited on the underside of a leaf.
The larvae are feeding on the underside of the leaves.
Full-grown cases in September – October, after hibernation the larva usually does not feed anymore and pupates nearby at ground level.
They come to light.
The adults fly in one generation a year during June and July.
This species can be found nearly everywhere.