Canadian Forest Service Publications

Comparison of early and late timing of spray applications for control of spruce budworm in Quebec. 1981. Blais, J.R.; DeBoo, R.F.; Auger, M. Canadian Journal of Forest Research 11: 538-544.

Year: 1981

Issued by: Laurentian Forestry Centre

Catalog ID: 14363

Language: English

Availability: PDF (request by e-mail)

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An experiment was conducted in the Lower St. Lawrence region of Quebec in 1978 to determine (1) the validity of aerial spray applications of aminocarb timed against emerging L2 larvae of the spruce budworm (Choristoneura fumiferana (Clem.)) as well as (2) the relationship of timing spray applications and success of treatment. Two successive applications timed at peak L4-L5 (regime C) gave better results than similar treatment at peak L2 and peak L4 (regime A). Reduction in larval population density, and the amount of foliage saved due to regime C were almost twice that obtained with regime A.