• Buckner, C.H.
  Forest Pest Management Institute
  
• McLeod, B.B.
  Forest Pest Management Institute
  

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.