Ocena zagrożenia upraw i młodników sosnowych przez choinka szarego Brachyderes incanus L. (Coleoptera, Curculionidae) oraz możliwości przeciwdziałania szkodom

摘要

Methods for rating the risk of damages to Scots pine plantations and thickets from B. incanus as well as the methods of damages counteraction are described. Risk rating is based on a number of B. incanus beetles and on a degree of needles damage (involving the percent of infested needles and the percent of destroyed needles lenghts). Damages counteraction is connected with the usage of mineral fertilizers and chemical treatments.