Короеды (Coleoptera, Curculionidae: Scolytinae) Байкальской Сибири

Abstract

A list of species of bark beetles of Baikal Siberia (the territories of the Irkutsk Oblast (Province), the Republic of Buryatia and the Zabaikalskii Krai (Territory) was given. The research was done using the entomological collection of the Core Facilities Center “Biore-source Center” at the Siberian Institute of Plant Physiology and Biochemistry SB RAS (Irkutsk, Russia). The 2711 specimens of 46 species of bark beetles from 18 genera were pro-cessed in total. In addition to this material, literary sources were also used. The 69 species of bark beetles from 20 genera, 12 tribes and 2 supertribes were recorded in the study area as a result. The schematic map of the collection sites for 46 species of bark beetles was presented for the first time. The arealogical group with territories of importation, collection sites and fodder wood species was presented for each species. Six arealogical groups were distinguished: Holarctic (2.9 %), Trans-Palaearctic (56.5 %), West-Central Palaearctic (15.9 %), Central Palaearctic (1.4 %), Central-East Palaearctic (21.7 %) and East Palaearctic (1.4 %). Bark beetles were divided into seven groups according to trophic characteristics in the study territory: monophage of conifer trees (2.9 %), monophage of deciduous trees (2.9 %), narrow oligophage of conifer trees (7.2 %), narrow oligophage of deciduous trees (5.8 %), wide oligophage of conifer trees (62.3 %), wide oligophage of deciduous trees (13 %) and polyphage (5.8 %). The most dangerous pests in Baikal Siberia are three species of bark beetles: Ips subelongatus (Motschulsky, 1860), Polygraphus proximus Blandford, 1894, Dendroctonus micans (Kugelann, 1794). I. subelongatus damages large areas of forests weakened by needle-chewing insects and fires. P. proximus is able of massively attacks trees of Siberian fir, regardless of their condition. D. micans is able of damages healthy conifers that do not have metabolic disorders.