This diploma work follows on the bachelor's work, in which we dealt in detail with the bionomy of the spruce bark beetle. Spruce bark beetle is considered to be the most important pest in spruce stands for a long time. Climate change, declining rainfall and high temperatures are creating favorable conditions for the massive spread of this species. In this diploma work we focused mainly on the theoretical determination of the beginning of spring swarming on the basis of maximum daily temperature, number of generations of spruce bark beetle in 2019 and also phenological models that can theoretically determine the phenological development of individual developmental stages based on average bark temperature. Theoretical results were compared with actual captures from pheromone traps in LO Vlčovo.