Polygraphus proximus and Ophiostoma aoshimae - a new threat to silver fir forests of Siberia and Europe. First detection of the pathogen.
Ussurijsky bark beetle Poligraphus proximus - the new invasive fir pest in Siberia and European Russia - over the last years became a hazardous fir forest pest. In the meantime the new hazardous pathogen Ophiostoma aoshimae infested fir woods. Data on its first identification in Europe on a dead fir near Serpukhov town in Moscow region are given. Laboratory studies of Ophiostoma aoshimae development opportunities on other coniferous species has been conducted. It was found that the pathogen could evolve on timber of Pinus sylvestris, P. sibirica, P. banksiana, Picea abies and P. pungens. There was no Ophiostoma aoshimae development on the pathogen inoculated branches of Pseudotsuga menziesii.