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Control of a Spruce Budworm Outbreak in Quebec through Aerial Spraying Operations1

Published online by Cambridge University Press:  31 May 2012

J. R. Blais
J. R. Blais
Affiliation:
Forest Research Laboratory, P.O. Box 35, Sillery, Quebec
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Abstract

An attempt was made to suppress an incipient spruce budworm outbreak in the Lower St. Lawrence region of Quebec through the aerial application of DDT. Operations began in 1960 and continued in 1961 and 1962 when they finally met with success. Failure to achieve success earlier was due partly to the exceptionally favourable survival conditions for the insect in 1960, and partly to the inadvertent omission of a small infested area from the program in 1961. The operations greatly reduced spruce budworm populations each year in the outbreak area, while the action of natural control factors, including parasites and predators increased. The collapse of the outbreak was the result of the combined effects of the chemical treatments and of natural control factors.

Type
Articles
Information
The Canadian Entomologist , Volume 95 , Issue 8 , August 1963 , pp. 821 - 827
Copyright
Copyright © Entomological Society of Canada 1963

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References

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