Forest Insect and Disease Conditions in Alberta, Saskatchewan, Manitoba and the Northwest Territories in 1989 and Predictions for 1990
Forest Insect and Disease Conditions in Alberta, Saskatchewan, Manitoba and the Northwest Territories in 1989 and Predictions for 1990

Author: F. J. Emond

Publisher:

Published: 1990

Total Pages: 40

ISBN-13:

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Forest pest conditions in Alberta, Saskatchewan, Manitoba, and the Northwest Territories during 1989 are summarized and some predictions of infestation status are given for 1990. Eleven major pests are discussed, and additional noteworthy insects, diseases, and tree damage agents are reported in a table. Results of surveys for acid rain symptoms and pests and damage incidence in nurseries and plantations are also reported.

Forest Insect- and Disease-caused Impacts to Timber Resources of West-central Canada, 1988-1992
Forest Insect- and Disease-caused Impacts to Timber Resources of West-central Canada, 1988-1992

Author: James Peter Brandt

Publisher: Canadian Forest Service, Northern Forestry Centre

Published: 1995

Total Pages: 44

ISBN-13:

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Describes the impacts caused by major forest insects (defoliators and bark beetles) and diseases (excluding those caused by fungi) to the timber resources of the Prairie Provinces and Northwest Territories in terms of wood volume losses due to tree mortality and growth reduction for the 1988-92 period. Most impacts were calculated using an automated system based on defoliation or infestation maps produced by geographic information systems and related inventory data. Results are presented for losses due to the following: spruce budworm (Choristoneura fumiferana), jack pine budworm (C. pinus pinus), forest tent caterpillar (Malacosoma disstria), large aspen tortrix (C. conflictana), bruce spanworm (Operophtera bruceata), mountain pine beetle (Dendroctonus ponderosae), spruce beetle (D. rufipennis), Douglas-fir beetle (D. pseudotsugae), Lodgepole pine dwarf mistletoe (Arceuthobium americanum), and wood decay.

Forest Insect and Disease Conditions in Alberta, Saskatchewan, Manitoba, and the Northwest Territories in 1990 and Predictions for 1991
Forest Insect and Disease Conditions in Alberta, Saskatchewan, Manitoba, and the Northwest Territories in 1990 and Predictions for 1991

Author: H. F. Cerezke

Publisher:

Published: 1991

Total Pages: 40

ISBN-13:

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Forest pest conditions in Alberta, Saskatchewan, Manitoba, and the Northwest Territories during 1990 are summarized and some predictions of infestation status are given for 1991. Twelve major pests are discussed, and additional noteworthy insects, diseases, and tree damage agents are reported in a table. An updating of surveys for acid rain symptoms in permanently established ARNEWS (Acid Rain National Early Warning System) plots and pest damage incidence in young coniferous stands are also reported.