This species is difficult to distinguish from the recently separated C. robustella. Genital dissection is necessary for a conclusive identification, although the first generation appear around three weeks after C. robustella.
The larvae produce a narrow gallery leading to a squarish or triangular blotch. They then form up to three successive cones by folding the lobe of a leaf downwards.
Recorded in 8 (3%) of the 270 2km squares of Huntingdonshire.
Last recorded in August 2022
Recorded date range (Adult): 18 May to 20 October