Phalaris arundinacea
The larvae feed on common wild oat ("Avena fatua"), wood small-reed ("Calamagrostis epigejos"), floating sweet-grass ("Glyceria fluitans"), reed canary grass ("Phalaris arundinacea") and common meadow-grass ("Poa pratensis"). The larvae create a mine which begins near the leaf tip and descends towards the base, occupying the entire width of the blade. The pupation takes place outside of the mine.