Last modified: April 19, 2020, 10:58 a.m.
This fairly common species is found all over Belgium.
The case, only constructed after the fourth moulting, is made of maximal 3 seed capsules spun together.
See also bladmineerders.be.
The eggs are deposited on the flowers of the food plant. These flowers are also the initial food source for the young larvae. Later on, after the 4th moult, the larva feeds on the ripe seeds where it then lives in a case made of maximal 3 seed capsules. Exceptionally, this species has two generations a year but, in general, there is only one generation and the larvae pass the winter in diapause.
Flies from May till the end of August, exceptionally in 2 generations.
Monophagous on Trifolium repens.
This species is mostly found on waste grounds and roadsides.