Last modified: April 12, 2021, 10:44 a.m.
A very rare and seldom recorded species in Belgium.
The forewings are ochreous till yellow greyish. The obscure costa line is light yellow.
The antennae are white with black dots at the bottom.
Wing span is 9–14 mm.
This species is very much confused with Coleophora alticolella and also with other on Juncus living Coleophora.
The case is tubular and trivalved, made from silk.
It is 5–7 mm and has a mouth angle of 20–25°.
The eggs are deposited on a flower of the hostplant. In June young larvae are appearing. Later they live from the ripening fruits. Before the winter the larvae can walk several meters away to hibernate.
In April or May follows the pupation. Larvae can live 2 years, but not all of them do so.
The adults come to light.
See also bladmineerders.be.
They are on the wing from the end of April till well into June.