Arctostaphylos uva-ursi
The larvae feed on "Arctostaphylos uva-ursi". They mine the leaves of their host plant. The mine consists of a slender gallery that eventually enters a petiole, from where it enters a bud. The larva hibernates in the bud, that is eaten out in spring. Then the larva bores in a young shoot, sometimes diverting into a leaf that then is completely mined out. Pupation takes place in a dark yellow cocoon inside the mine.