• DeBoo, R.F
  Department of the Environment, Canadian Forestry Service
  
• Holdall, V
  Department of the Environment, Canadian Forestry Service
  

Nine insecticides were evaluated on pines (pinus spp) or source (picea spp) in recreation areas and forest plantations in Manitoba from 1967 to 1969 for control of the jack-pine budworm and spruce budworm. Application equipment included knapsack type compressed air sprayers and mist blowers. high pressure hydraulic sprayers and a trailer mounted mist blower. Results indicated that applications of Baygon, carbyl, dimeonthate, dylox, fenitrothion, matacil, phorate or phosphamidon, reduced jack pine budworm larval populations levels and prevented serious feeding injury. Efficacy of malathion treatments were less conclusive. Applications of phosphamidon for control of spruce budworm gave high larval mortality and prevented defoliation. The experimental applications show also that ground equipment is practical where few scattered low-acreage treatments are required.