Last modified: Oct. 21, 2020, 9:50 a.m.
A very rare species in Belgium.
See also bladmineerders.be
Pay close attention to abandoned mines, because they resemble the mines of a Diptera Agromyza albitarsis very well. Also look out for Hymenoptera Heterarthrus ochropoda (sawfly) which occur at the same time and host plant, if no caterpillars are present in the leaf mine.
The usually 5 to 10 eggs are deposited in groups on the upperside of the leaf, usually along a vein. The white larvae form large, upper-surface blotches in which many larvae may be present because mines can merge.
Pupation is external, mostly on the leaf. Exit slit in upper epidermis.
Different species of Populus and in Central Europe also on Salix.