The highest species diversity of willow beetles Phratora (Col., Chrysomelidae) was found on selected sites of willows growing on banks of rivers (Salicetum triandro-viminalis Lohm.). On shortrotation coppice willows only one species Phratora vulgatissima was present. This species belongs to the most dangerous pests occurring on Salix viminalis plantations in south-eastern Poland.