Salix viminalis
The larvae feed on "Myrica gale", "Populus tremula", "Salix alba", "Salix aurita", "Salix babylonica", "Salix caprea", "Salix cinerea", "Salix dasyclados", "Salix fragilis", "Salix glabra", "Salix pentandra", "Salix repens", "Salix triandra" and "Salix viminalis". They create a bivalved composite leaf case of . It is rather strongly compressed and keeled and has a mouth angle of 30-45°. Full-grown larvae can be found at the end of May.