Canadian Forest Service Publications

A recent spruce budworm outbreak in the Lower St. Lawrence and Gaspé Peninsula with reference to aerial spraying operations. 1960. Blais, J.R.; Martineau, R. Forestry Chronicle 36(3): 209-224.

Year: 1960

Issued by: Laurentian Forestry Centre

Catalog ID: 14919

Language: English

Availability: PDF (request by e-mail)

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The main topics discussed in this paper are: the progress of the spruce budworm outbreak in the Lower St. Lawrence - Gaspé regions from 1949 to 1956; the areas sprayed between 1954 and 1958; timing of spray application in relation to insect abundance and development; effects of treatment on spruce budworm populations and on defoliation of balsam fir; results of aerial defoliation surveys and egg surveys; estimated amounts of wood destroyed by the insect, and losses averted through spraying; the various natural control factors associated with the decline and the eventual collapse of the outbreak.