Last modified: April 11, 2021, 10:34 a.m.
A very rare species in Belgium, but probably overlooked in many places.
See also bladmineerders.be
The young larva makes a circular blotch mine without an initial gallery on the upper side of a leaf of the food plant. The abundant black frass lie in indistinct arcs or spirals and are attached to the upper cuticle forming a dark central fleck.
Pupation in a white oval silken cocoon, generally spun beneath a leaf of the food plant.
The adults fly normally in one generation a year during May. When conditions are favourable a second generation occurs during August.