Last modified: Feb. 18, 2020, 10:48 a.m.
An uncommon species throughout Belgium.
The egg is deposited on the petiole near the base of the leaf.
The mine starts inside the petiole which causes it to swell. Further on the caterpillar makes an elongated blotch at the base of the leaf. Mostly between the midrib and first lateral vein. The frass lays in two lines on either side of the mine.
See also bladmineerders.be
The cocoon is pale to dark brown and is spun amongst leaf litter.
Adults emerge in May or June.
Ectoedemia argyropeza feeds only on Populus tremula.