Impact of Experimental Spruce Budworm (Choristoneura fumiferana Clemens) Suppression Trials Upon Forest Dwelling Birds in Newfoundland in 1977.

Buckner, C. H.; McLeod, B. B.

Impact of Experimental Spruce Budworm (Choristoneura fumiferana Clemens) Suppression Trials Upon Forest Dwelling Birds in Newfoundland in 1977.

Problem Addressed: Spruce budworm outbreak in Newfoundland that has steadily increased in size and intensity since 1971

Key Findings: Presents the results of studies carried out to determine the immediate and short-term effects of a series of experimental sprays upon forest dwelling birds exposed to the various treatment regimes.

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Buckner, C. H.
Canadian Forestry Service
McLeod, B. B.
Canadian Forestry Service

Abstract:

Immediate and short-term consequences of experimental spruce budworm (Choristoneura fumiferana Clemens) suppression trials upon the forest dwelling bird complex were studied. A series of trials employing aminocarb at the emitted dosage rates of 0.070 kg AI/ha X 3 and 0.087 kg AI/ha X 2 did not damage bird populations or interrupt breeding activity. Trials involving two applications of fenitrothion (0.210 kg AI/ha) followed by aminocarb (0.070 kg AI/ha) caused a short-term decline in the activity of warblers (family Parulidae). Acephate (0.056 kg AI/ha) combined by Bacillus thuringiensis Berliner (19.8 BIU/ha) and applied twice caused a reduction of warbler activity.

Plot searches following each trial failed to recover any dead birds and no sick or stressed birds were observed.

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