Mass Flights of the Spruce Budworm

Abstract

During the course of an investigation of the dispersal of the spruce budwonm (Henson, 1950), mass flights of the insect have been studied. The records of these flights are to be found in the files of the Forest Insect Laboratory, Sault Ste. Marie, Ontario, but in many cases these records are not complete. Nineteen flights for which sufficient data exist have been examined.