The insect production unit was started in 1963, and is now the largest of its kind in Canada. This study supplies insects not only to scientists at the Great Lakes Forestry Centre, but also to other forestry establishments, universities,and research centres in Canada and the United States. Some 14 insect species are reared, in numbers totaling over 4.5 million per year. Successes include the development of non-diapause strains of some insects such as the western spruce budworm. In addition, the first laboratory cultures of hemlock looper and fir coneworm were established here.

About 5,000 litres of artificial diet are prepared and dispensed annually to support the insects reared. The diet has been modified to provide better insect growth and to suit the needs of various insects.