Canadian Forest Service Publications
A cartographic history of spruce budworm defoliation 1967 to 1981 in eastern North America. (Historique en cartes de la défoliation causée par la tordeuse des bourgeons de l’épinette dans l’est de l’Amérique du Nord de 1967 à 1981). 1983. Kettela, E.G. Environment Canada, Canadian Forestry Service, Headquarters, Ottawa. Information report DPC-X-14. 8 p. (includes: Maps).
Issued by: National Capital Region
Catalog ID: 20091
Language: English / French
Availability: PDF (download)
The maps of spruce budworm (Choristoneura fumiferana Clem.) defoliation presented cover the period from 1967 to 1981. A map showing areas of dead and dying trees, the effect of successive years of defoliation, is also included. Informatin contained in this report was extracted from Provincial, federal, and State Government and Industry files. The current spruce budworm infestation plaguing the spruce-fir forests of eastern North America is the most widespread this century.