Last modified: Jan. 21, 2020, 2:10 p.m.
In the past only known from a record in 1862 near Dinant (NA), but in 2009 found again in the same province. By searching for mining lepidoptera, the species is already found in several more provinces, all located in the south of the country.
The eggs are deposited on the green leaves, often near a grain.
Young caterpillars make a small full depth corridor or blotch mine, where they concentrate the blackish frass. Later they live outside the mine on the leaves in a small spun case covered with the produced frass.
See also bladmineerders.be
Pupation takes places in the larval case, which is often fixed against a midrib of a leaf. Adults are active during daylight, especially in early morning and in late afternoon. They stay in the neighbourhood of the food plant, where they rest usually inconspicuously on the underside of the leaves of the host plant.
The adults fly in one generation a year during June and July.