paljude puude ja põõsaste okste kuivamist põhjustav kahjur, locally common on ash (Fraxinus excelsior), common alder (Alnus glutinosa) and willow (Salix), also on elm (Ulmus), lilac (Syringa), lime (Tilia), maple (Acer), poplar (Populus), and other species, heavy encrustations impart a whitish appearance to the bark of host plants, and the pest has a deleterious effect on the growth of young trees and shurbs