Download or read book A Cartographic Representation of Spruce Budworm Choristoneura Fumiferana Clem Infestation in Eastern Canada 1909 1966 written by Canadian Forestry Service and published by Imprimeur de la Reine. This book was released on 1970 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Cartographic Representation of Spruce Budworm Choristoneura Fumiferana Clem Infestation in Eastern Canada written by C. E. Brown and published by . This book was released on 1970 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Cartographic Representation of Spruce Budworm Choristoneura Fumiferana Clem Infestation in Eastern Canada written by C. E. Brown and published by . This book was released on 1970 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cartographic Representation of Spruce Budworm Choristoneura Funiferana Clem Infestation in Eastern Canada 1909 1966 written by Canada. Forestry Branch and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Cartographic of Spruce Budworm Choristoneura Fumiferana Clem Infestation in Eastern Canada 1909 1966 written by and published by . This book was released on 1970 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cartographic Representation of Spruce Budworm choristoneura Fumiferana Infestation in Eastern Canada 1909 1966 written by Canadian Forestry Service and published by . This book was released on 1969 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spruce Budworm in Eastern United States written by J. L. Bean and published by . This book was released on 1973 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Spruce Budworm Suppression 1972 written by and published by . This book was released on 1972 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Outbreaks of the Western Spruce Budworm in the American Northern Rocky Mountain Area from 1922 Through 1971 written by Philip Cornwell Johnson and published by . This book was released on 1975 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Studies on the Spruce Budworm Cacoecia Fumiferana Clem written by James Malcolm Swaine and published by . This book was released on 1924 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Continuous Evaluation and Reporting of a Changing Spruce Budworm Damage Picture in Canada written by W. L. Sippell and published by [Hull, Quebec] : Canadian Forestry Service. This book was released on 1983 with total page 48 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 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 Forest Pest Leaflet written by and published by . This book was released on 1955 with total page 528 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:

Download or read book USDA Forest Service General Technical Report INT written by and published by . This book was released on 1974 with total page 804 pages. Available in PDF, EPUB and Kindle. Book excerpt: