Canadian Forest Service Publications

Possible residual effect of fenitrothion on Swaine jack pine sawfly following aerial applications against the spruce budworm in Quebec. 1975. McLeod, J.M. Annales de la Société Entomologique du Québec 20: 82-85.

Year: 1975

Issued by: Laurentian Forestry Centre

Catalog ID: 15592

Language: English

Availability: PDF (request by e-mail)

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Fenitrothion was applied at .046 kg/ha in two separate operations against the spruce budworm, Choristoneura fumiferana Clem., on May 28 and June 10, 1974 at Lac du Chevalier, Laviolette Co., Quebec. On July 22, 1974, newly hatched Swaine jack pine sawfly larvae, Neodiprion swainei Midd., from a jack pine stand within the treated area were observed dying shortly after commencing feeding. In laboratory experiments, survival of larvae from the treated area reared on treated foliage was less than 1 %, but was 49 % when foliage from an untreated area was offered. Survival of larvae from an untreated area was 72%, as opposed to 7% when the same lot was offered treated foliage. The implications of these findings to control of Swaine jack pine sawfly are discussed.