Last modified: Feb. 18, 2020, 9:14 a.m.
A fairly common species in Belgium. Sometimes becoming a pest in orchards.
Egg is laid on the underside of the leaf, close to a vein.
The mine starts as a narrow winding gallery which sometimes widens conspicuously towards a secondary blotch.
See also bladmineerders.be
Pupation in a yellowish brown cocoon among leaf litter.
The adults fly in two generations a year; in May and August.
The yellowish larva makes a variable leafmine on Malus sylvestris and rarely on Prunus.