Betula pubescens
The pale greenish larvae feed on "Betula nana", "Betula pendula", "Betula pubescens" and "Betula pubescens carpatica". They mine the leaves of their host plant. The mine consists of a short tortuous corridor, that widens into a blotch, often between two lateral veins. The frass is dispersed. Pupation takes place outside of the mine.