Climate dynamics on our planet drive range border movements for many species. Insects, being ectothermic animals, significantly respond to changes in these conditions. We recently demonstrated northward expansion for important invasive pest species such as Lymantria dispar in central Asia. In the current study, we combined historical data and our modern data, using very sensitive pheromone trapping, to estimate the dynamics of the northern range border of Lymantria dispar.