Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Cartographic History of Spruce Budworm Defoliation from 1967 to 1981 in Eastern North America written by E. G. Kettela and published by Canadian Forestry Service = Service canadien des forêts. This book was released on 1983 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the US FRG Research Symposium written by and published by . This book was released on 1989 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Protection Strategy against Spruce Budworm written by David A. MacLean and published by MDPI. This book was released on 2020-01-15 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Download or read book General Technical Report NC written by and published by . This book was released on 1981 with total page 536 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Population Dynamics of the Major North American Needle eating Budworms written by Robert W. Campbell and published by . This book was released on 1993 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial Assessment of Red Spruce Balsam Fir Condition in the Adirondack Region of New York the Green Mountains of Vermont the White Mountains of New Hampshire and the Mountains of Western Maine 1985 1986 written by Margaret M. Miller-Weeks and published by . This book was released on 1993 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Insect and Disease Conditions in the Pacific Northwest written by and published by . This book was released on 1984 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Cartographic History of Spruce Budworm Defoliation from 1967 to 1981 in Eastern North America written by E. G. Kettela and published by Canadian Forestry Service = Service canadien des forêts. This book was released on 1983 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Insect and Disease Conditions in the United States 1979 83 written by Robert C. Loomis and published by . This book was released on 1985 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Environmental Ecology written by Bill Freedman and published by Elsevier. This book was released on 1995-01-17 with total page 621 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly revised and significantly expanded, the Second Edition of Environmental Ecology provides new case studies and in-depth treatment of the effects of pollution and other disturbances on our oceans, lakes, forests, and air. New chapters on biological resources and ecological applications have been added, including material on environmental economics, import assessments, ecological monitoring, and environmental ethics. Extensive indexes, a glossary, and a bibliography are included.

Download or read book The Spruce Budworm Outbreak in Maine in the 1970 s written by and published by . This book was released on 1988 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Towards Sustainable Management of the Boreal Forest written by Philip Joseph Burton and published by NRC Research Press. This book was released on 2003 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presenting a summary of the development in boreal forest management, this book provides a progressive vision for some of the world's northern forests. It includes a selection of chapters based on the research conducted by the Sustainable Forest Management Network across Canada. It includes a number of case histories.

Download or read book Information Reports Digest written by and published by . This book was released on 1980 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers all information reports being published by the Canadian Forestry Service.

Download or read book Forest Insect Guilds written by and published by . This book was released on 1991 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Information Report written by and published by . This book was released on 1985 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recent Advances in Spruce Budworms Research written by C. J. Sanders and published by Ottawa, Ont. : Canadian Forestry Service. This book was released on 1985 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: