• Holmes, S.B.
  Forest Pest Management Institute, Canadian Forestry Service
  
• Kingsbury, P.D.
  Forest Pest Management Institute, Canadian Forestry Service
  

Large scale aerial applications of insecticides have been employed since 1952 as a means to limit the damage caused to Eastern Canadian forests by the spruce budworm, Choristoneura fumiferana Clem. Over this period the control agents used have changed from persistant organochlorine insecticides to relatively non-persistant organophosphorus and carbamate insecticides, and this has been accompanied by reductions in the impact of control programs on non-target organisms within the forest areas treated. The commercial product most widely used to control spruce budworm in Canada over the past few years has been Matacil, containing the carbamate insecticide aminocarb (4- dimethylamino-m-tolyl methylcarbamate). This product has been found to effectively control the target insect with few apparent adverse effects on forest ecosystems.