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Author : Daniel M. Schmitt
Publisher : Unknown
Page : 204 pages
File Size : 49,6 Mb
Release : 1984
Category : Insect pests
ISBN : UVA:X001754438
Author : Bruce A. Montgomery
Publisher : Unknown
Page : 40 pages
File Size : 49,7 Mb
Release : 1982
Category : Spruce budworm
ISBN : MINN:31951D01930215H
Author : Society of American Foresters. Region VI. Technical Conference
Publisher : Unknown
Page : 228 pages
File Size : 42,5 Mb
Release : 1985
Category : Fir
ISBN : MINN:31951D02974696V
Author : Anonim
Publisher : Unknown
Page : 24 pages
File Size : 48,9 Mb
Release : 1985
Category : Fir
ISBN : UVA:X001754765
Author : J. R. Carrow,C. J. Sanders,Canada-Ontario Joint Forestry Research Committee,Great Lakes Forest Research Centre,Ontario. Ministry of Natural Resources
Publisher : Sault Ste. Marie, Ont. : The Centre
Page : 140 pages
File Size : 43,8 Mb
Release : 1983
Category : Spruce
ISBN : MINN:31951D00390969G
The purpose of this symposium was to improve understanding of thenature of the spruce budworm problem in Ontario, and to generatediscussion on five theme questions relating to the importance ofthe problem in Ontario in the future (1982-2000). The fivequestions were: 1. How important will the spruce-fir componentbe? 2. What are the attitudes of forest industry towards futureutilization of balsam fir? 3. In what forest use patterns willthe spruce budworm be important? 4. What management actionsshould be taken now to reduce future impact? 5. What informationis needed to facilitate management of the spruce budworm problem?
Author : David A. MacLean
Publisher : MDPI
Page : 220 pages
File Size : 50,8 Mb
Release : 2020-01-15
Category : Science
ISBN : 9783039280964
Spruce budworm (Choristoneura fumiferana (Clem.)) outbreaks are a dominant natural disturbance in the forests of Canada and northeastern USA. Widespread, severe defoliation by this native insect results in large-scale mortality and growth reductions of spruce (Picea sp.) and balsam fir (Abies balsamea (L.) Mill.) forests, and largely determines future age–class structure and productivity. The last major spruce budworm outbreak defoliated over 58 million hectares in the 1970s–1980s, and caused 32–43 million m3/year of timber volume losses from 1978 to 1987, in Canada. Management to deal with spruce budworm outbreaks has emphasized forest protection, spraying registered insecticides to prevent defoliation and keep trees alive. Other tactics can include salvage harvesting, altering harvest schedules to remove the most susceptible stands, or reducing future susceptibility by planting or thinning. Chemical insecticides are no longer used, and protection strategies use biological insecticides Bacillus thuringiensis (B.t.) or tebufenozide, a specific insect growth regulator. Over the last five years, a $30 million research project has tested another possible management tactic, termed an ‘early intervention strategy’, aimed at area-wide management of spruce budworm populations. This includes intensive monitoring to detect ‘hot spots’ of rising budworm populations before defoliation occurs, targeted insecticide treatment to prevent spread, and detailed research into target and non-target insect effects. The objective of this Special Issue is to compile the most recent research on protection strategies against spruce budworm. A series of papers will describe results and prospects for the use of an early intervention strategy in spruce budworm and other insect management.
Author : Martha H. Brookes
Publisher : Unknown
Page : 130 pages
File Size : 41,7 Mb
Release : 1985
Category : Forest management
ISBN : STANFORD:36105032995057
Author : Society of American Foresters. Region VI Technical Conference
Publisher : Unknown
Page : 217 pages
File Size : 54,9 Mb
Release : 1984
Category : Fir
ISBN : OCLC:13196549
Author : Christine B. Anderson
Publisher : Unknown
Page : 24 pages
File Size : 48,7 Mb
Release : 1983
Category : Spruce budworm
ISBN : MINN:31951D02962922S
Author : Ann M. Lynch,John A. Witter
Publisher : Unknown
Page : 78 pages
File Size : 42,7 Mb
Release : 1983
Category : Fir
ISBN : MINN:31951D028660542
Author : Dale S. Solomon
Publisher : Unknown
Page : 48 pages
File Size : 40,7 Mb
Release : 1992
Category : Fir
ISBN : MINN:31951D02969693I
Author : Valentine M. Carolin,W. K. Coulter
Publisher : Unknown
Page : 24 pages
File Size : 51,8 Mb
Release : 1975
Category : Abies grandis
ISBN : MINN:31951D02995111W
Author : David G. Fellin
Publisher : Unknown
Page : 12 pages
File Size : 47,7 Mb
Release : 1982
Category : Western spruce budworm
ISBN : MINN:31951D002796676
Author : Steven Allen Sinclair
Publisher : Unknown
Page : 76 pages
File Size : 44,6 Mb
Release : 1984
Category : Balsam fir
ISBN : UVA:X001754778
Author : Anonim
Publisher : Unknown
Page : 12 pages
File Size : 53,5 Mb
Release : 1983
Category : Spruce budworm
ISBN : UVA:X030490865
Pp. 8.