a1 Insect Pathology Research Institute, Sault Ste. Marie, Ontario
The spruce budworm, Choristoneura fumiferana (Clemens), was reared on a synthetic diet. Comparison of two successive laboratory generations reared on synthetic diet and on frozen balsam fir buds showed that diet-fed insects had a higher survival, developed faster, were heavier, mated more successfully, and were more fecund.
(Received April 10 1964)
1 Contribution No. 57, Insect Pathology Research Institute, Department of Forestry, Canada.