Forest entomology is applied ecology with its scientific roots in silviculture and population ecology of insects. The main focus in forest entomology is on the insect pests of the forests and how damage can be prevented or controlled.
In later years the field of interest has been broadened to include the insect community in the forest ecosystem with a special focus on the dual role of dead wood as breeding material for pest species and a necessity for endangered saproxylic insects.
The interaction between the insect and its host is of fundamental importance for the understanding of how insect outbreaks occur and develop, and how to avoid or counteract damage in the best possible way. Forest entomology is hence an interdisclipinary field of science with many links to units within and outside of the department.