In the Bryansk region, intensive spread of the pest Agrilus planipennis Fairmaire, 1888 was recorded within the urban area of Bryansk. Artificially created plantings of the North American introduced species Fraxinus pennsylvanica Marsh. are most susceptible to damage in urban xero-mesophytic habitats. In ash stands in the river valleys of the urban area and in tree communities with spontaneous dispersal of this species we noted uneven damage caused by A. planipennis. The use of the damage index, easily accessible for study, based on the number of ejection holes, has shown its low effectiveness, since no reliable dependence of its values on other indirect signs of damage was identified.

M.S. Kholenko, Yu.A. Semenishchenkov, N.N. Panasenko