Weak population genetic structure in Eurasian spruce bark beetle over large regional scales in Sweden.

The Eurasian spruce bark beetle, , is a major pest, capable of killing spruce forests during large population outbreaks. Recorded dispersal distances of individual beetles are typically within hundreds of meters or a few kilometers. However, the connectivity between populations at larger distances and longer time spans and how this is affected by the habitat is less studied, despite its importance for understanding at which distances local outbreaks may spread.