Last modified: April 23, 2019, 12:44 p.m.
In the past there has been a lot of confusion in the C. serratella group. Older determinations must be treated with big care! After 2004 all determinations must be done with making genital preparations.
The forewings are greyish till greyish brown.
Wingspan is 9–13 mm.
The caterpillar makes a 6–7 mm trivalved, tubular leaf case. At first, it is light brown, lateron it changes into darker brown.
The mouth angle is 45°.
See also bladmineerders.be
The larvae live at the underside of the leaf, making rather big fleck mines.
The larvae are fully grown at the end of May.
This species in mostly confused with other greyish species, especially with C. serratella.
Therefore growing and making genital preparation is necessary.
The adults are on the wing from the end of June till the beginning of August.