• Thomson, M. J.
  Great Lakes Forestry Centre
  
• Evans, H. J.
  Great Lakes Forestry Centre
  
• Constable, D. C.
  Great Lakes Forestry Centre
  
• Jones, C.G.
  Great Lakes Forestry Centre
  
• Macleod, L.S.
  Great Lakes Forestry Centre
  

This is a review of significant forest insects and diseases that have occurred in the Terrace Bay District between 1950 and 1980. In 1973, the Terrace Bay District was formed from the southern part of the Geraldton District and the western part of the White River District. In the selection of pests for this report, particular attention was paid to the major working groups of host species in the District, mainly jack pine, white spruce, black spruce, balsam fir and the tolerant hardwoods (white birth and poplar) as well as some ornamental and shade trees. The insects and diseases included are capable of causing, or have caused, tree mortality or a reduction in growth. Also included are abiotic problems that caused damage, e.g., salt, frost, wind and snow damage, etc.