• Holmes, S.B.
  Canadian Forestry Service
  
• Millikin, R.L.
  Canadian Forestry Service
  
• Kingsbury, P.D.
  Canadian Forestry Service
  

A split application of SEVIN-2-OIL ® had no significant adverse affect on either forest songbirds or wild pollinators, and only a slight knockdown effect on non-target terrestrial arthropods. Carbaryl residues as high as 313.7 ppb and 122.6 ppb were detected in stream water immediately after the first and second applications respectively. Residues declined rapidly but were still detected (0.9 ppb) up to 10 days after the completion of spraying. Although both treatments resulted in disruptions in the normal diurnal drift pattern of aquatic invertebrates, the overall effect on benthic invertebrate populations was negligible. Analyses of brook trout and slimy sculpin stomach contents indicated that availability of food was not significantly reduced. No mortality was recorded among native brook trout caged in the treatment stream for up to 10 days after the second application. SEVIN-2-OIL® was applied twice at a dosage rate of 280 g/ha/application to a400 ha spray block located near Allardville in Gloucester County, New Brunswick.