The larvae feed on Astragalus, Chamaecytisus supinus, Genista tinctoria, Laburnocytisus adamii, Laburnum alpinum, Laburnum anagyroides, Lupinus polyphyllus and Petteria ramentacea (Fabaceae). They mine the leaves of their host plant. The mines are undistinguishable from those of Leucoptera genistae. The mine starts as a densely contorted corridor, that quickly turns brown. It is followed by a more or less straight corridor entirely filled with greyish-green frass. Then it widens into a round blotch that overruns the earlier corridor and in the end may occupy half of a leaflet. Pupation takes place outside of the mine.
