Key Findings: The 1977 Plecopttera populations on streams treated in 1976 were not similar in generic composition to populations collected on the same stream in 1976 although they were equal in numbers of individuals and taxa.
Problem Addressed: 1979 Aerial Spraying Against Spruce Budworm in Quebec and Forecast for 1980.
Key Findings: Spray program gave satisfactory results over 96% of the treated area; the application was done late but the populations were not very high (11 larvae/45cm branch and the delay had no bad consequence.
Key Findings: The biological repression program was a total success. The residual egg mass populations are significant as to the result of the spraying. No control program will be carried out in 1980 in Quebec.