Populus nigra
The larvae feed on "Quercus" species, including "Quercus robur", "Quercus petrea", "Quercus pubescens", "Quercus cerris" and "Quercus ilex", but also "Populus alba", "Populus nigra", "Fraxinus", "Pyrus" and "Prunus". "Salix" might also be a host plant, since larvae have been reared on "Salix caprea" in captivity.