Forest Insect and Disease Conditions in Alberta, Saskatchewan, Manitoba, and the Northwest Territories in 1990 and Predictions for 1991 PDF Download
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Author: H. F. Cerezke
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 40
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Book Description
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.
Author: H. F. Cerezke
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 40
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Book Description
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.
Author: H. F. Cerezke
Publisher:
ISBN: 9780662195023
Category : Forest insects
Languages : en
Pages : 24
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Book Description
Author: F. J. Emond
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 40
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Book Description
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.
Author: B. H. Moody
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 38
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Book Description
Author:
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 346
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Book Description
Author: Northern Forest Research Centre (Canada)
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 20
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Book Description
Author: James Peter Brandt
Publisher: Canadian Forest Service, Northern Forestry Centre
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 44
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Book Description
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.
Author: F. J. Emond
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 42
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Book Description
Of forest pest conditions for 1988, with some predictions of infestation status for 1989. Nine major pests are discussed in order of importance (spruce budworm, forest tent caterpillar, mountain pine beetle, Dutch elm disease, dwarf mistletoe, yellowheaded spruce sawfly, larch sawfly, large aspen tortrix, jack pine budworm), and additional noteworthy insects, diseases, and tree damage agents are reported. Results of surveys for acid rain symptoms and pests and damage incidence in nurseries and plantations are also reported.
Author: H. F. Cerezke
Publisher:
ISBN:
Category : Forest insects
Languages : en
Pages : 40
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Book Description
Forest pest conditions in Alberta, Saskatchewan, Manitoba, and the Northwest Territories during 1987 are summarized, and some predictions of infestation status are given for 1988. Eight major pests are discussed, and additional noteworthy insects, diseases, and other tree damage agents are reported in a table. Results of surveys for acid rain symptoms, pests and damage incidence in nurseries and plantations, and climatic injury to trees are also reported.
Author: B. H. Moody
Publisher:
ISBN: 9780662125433
Category : Forest insects
Languages : en
Pages : 19
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Book Description
