Last modified: May 7, 2019, 1:08 p.m.
Recorded for the first time in Belgium in 2018 in the most southern part of the country.
The mine starts at the base on the underside of a leaf as a short gallery, gradually widening. The leaf is slightly inflated. The frass is concentrated in the lowest one-third of the mine.
The egg is deposted at the base of a leaf.
The adults have been observed flying low over the vegetation in late afternoon.
Probably two generations a year: from late April till June and from mid-July till early August.
Preferably in coastal areas, dikes etc. with a lot of grass, but also in other places where the food plant occurs.