Last modified: March 20, 2021, 3:25 p.m.
In Belgium recorded for the first time in 2015 in LX. Hitherto a very rare and local species.
The forewings of this species are brown with a few whitish lines. It resembles well C. argentula and C. tanaceti. The antennae are ringed alternately white and brown till the tip. Wingspan is about 12–15 mm.
The brownish case of this species can reach a length of about 5–6 mm and is covered with remnants of withered flowers.
See also bladmineerders.be.
The larva lives on the flower heads of its hostplant and feeds on the ripening fruits. Cases are easiest found in September and October.
The moths are on the wing in July and August.
This species is monophagous on Tanacetum vulgare.
Mostly found in open fields and along roadsides.