Last modified: March 27, 2021, 11:53 a.m.
A very rare and local species in Belgium.
The fore wings are light ochreous with whitish length lines and a white costa line. Those lines are very narrow although rather good distinguishable.
The antennae are ringed alternating till ½ or sometimes till the top.
Wing span is 9–12,5 mm.
The case is made inside a Juncus flower, so it looks like it. It is 5 mm and trivalved.
The mouth angle is 20°.
The eggs are deposited on a flower of the food plant. The young larvae live in a fruitlet and eats the seeds. Later on a case is formed and the larvae are eating the fruits from the outside.
Larvae from August till November.
The full fed larva generally leaves to host plant to hibernate elsewhere.
Pupation in the following spring, still in the case.
They are on the wing from mid June till the beginning of August.
The food plant stands in rather moist area's.