Fig. 1

Map of Russia showing the federal subjects, where Dendrolimus sibiricus is present (dark gray areas) and not present (light gray areas). The distribution of D. sibiricus is uncertain for some of the federal subjects in European Russia (gray areas). The black lines represent the distribution for some of the main host species for D. sibiricus. The 60th meridian east represents the border between Europe and Asia. The map was compiled from literature and personal communication. Data on the distribution of Picea obovata were unavailable