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Author : Kenneth F. Lancaster
Publisher :
ISBN 13 :
Total Pages : 8 pages
Book Rating : 4.:/5 (319 download)
Download or read book Managing Eastern Hemlock written by Kenneth F. Lancaster and published by . This book was released on 1985 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jeffrey S. Ward
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (117 download)
Download or read book Eastern Hemlock Forests written by Jeffrey S. Ward and published by . This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Glenn D. Mroz
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.:/5 (89 download)
Download or read book Hemlock Ecology and Management written by Glenn D. Mroz and published by . This book was released on 1995 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Katherine A. McManus
Publisher :
ISBN 13 :
Total Pages : 248 pages
Book Rating : 4.:/5 ( download)
Download or read book Proceedings written by Katherine A. McManus and published by . This book was released on 2000 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carl H. Tubbs
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (319 download)
Download or read book How to manage eastern hemlock in the Lake States written by Carl H. Tubbs and published by . This book was released on 1978 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Anthony D'Amato
Publisher : Yale University Press
ISBN 13 : 0300179383
Total Pages : 336 pages
Book Rating : 4.3/5 (1 download)
Download or read book Hemlock written by Anthony D'Amato and published by Yale University Press. This book was released on 2014-04-29 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: An appreciation of the beautiful, iconic, and endangered Eastern Hemlock and what it means to nature and society The Eastern Hemlock, massive and majestic, has played a unique role in structuring northeastern forest environments, from Nova Scotia to Wisconsin and through the Appalachian Mountains to North Carolina, Tennessee, and Alabama. A “foundation species” influencing all the species in the ecosystem surrounding it, this iconic North American tree has long inspired poets and artists as well as naturalists and scientists. Five thousand years ago, the hemlock collapsed as a result of abrupt global climate change. Now this iconic tree faces extinction once again because of an invasive insect, the hemlock woolly adelgid. Drawing from a century of studies at Harvard University’s Harvard Forest, one of the most well-regarded long-term ecological research programs in North America, the authors explore what hemlock’s modern decline can tell us about the challenges facing nature and society in an era of habitat changes and fragmentation, as well as global change.
Author :
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.3/5 (243 download)
Download or read book Proceedings: Symposium On Sustainable Management Of Hemlock Ecosystems in Eastern North America, June 22-24, 1999, Durham, New..., General T. written by and published by . This book was released on 1980 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Carl H. Tubbs
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (249 download)
Download or read book How to Manage Eastern Hemlock in the Lake States written by Carl H. Tubbs and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. W. Anderson
Publisher : Sault Ste. Marie, Ont. : Ontario Ministry of Natural Resources
ISBN 13 :
Total Pages : 56 pages
Book Rating : 4.:/5 (319 download)
Download or read book The Tolerant Conifers written by H. W. Anderson and published by Sault Ste. Marie, Ont. : Ontario Ministry of Natural Resources. This book was released on 1994 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Brief overview of the information available on hemlock, including distribution, utilization, ecology, and management. The 2d short article deals with the silvics, ecology, genetics, harvesting and regeneration of red spruce, and its complementary relationship to hemlock in their role in wildlife management.
Author : Jeffrey S. Ward
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.:/5 (319 download)
Download or read book Eastern Hemlock Forests written by Jeffrey S. Ward and published by . This book was released on 2004 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jason York
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (974 download)
Download or read book Assessment of Eastern Hemlock Vitality in Hemlock Woolly Adelgid Infestations Following Release of Sasajiscymnus Tsugae for Biological Control written by Jason York and published by . This book was released on 2010 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: The biological control agent Sasajiscymnus tsugae [Coccinellidae: Coleoptera] has been released in the Pisgah National Forest region as a predator of the invasive Hemlock Woolly Adelgid, Adelges tsugae [Homoptera: Adelgidae], since 2005. This study was designed to compare indices of Eastern hemlock, Tsuga canadensis, vitality between biological control areas and non-beetle release areas. Hemlocks found in 2006 S. tsugae release areas in cove forests had greater percent new growth and longer average length of new growth than hemlocks in non-beetle areas. This suggests that hemlocks in some biological control areas are experiencing less stress from Hemlock Woolly Adelgid infestation than those in non-beetle areas. More data is needed on dispersal, population, and fecundity rates of S. tsugae, as well as hemlock vitality in existing biological control areas before the benefits of this type of management can be accurately measured. Focused management of high quality hemlock stands in high stress years may reduce hemlock mortality rates following Hemlock Woolly Adelgid infestation.
Author : Mark S. McClure
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (31 download)
Download or read book Managing Hemlock Woolly Adelgid in Ornamental Landscapes written by Mark S. McClure and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : North Central Forest Experiment Station (Saint Paul, Minn.)
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (631 download)
Download or read book How to Manage Eastern Hemlock in the Lake States written by North Central Forest Experiment Station (Saint Paul, Minn.) and published by . This book was released on 1978 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark S. McClure
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (319 download)
Download or read book Biology and Control of Hemlock Wooly Adelgid written by Mark S. McClure and published by . This book was released on 1987 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Clarence Ralph Letteer
Publisher :
ISBN 13 :
Total Pages : 866 pages
Book Rating : 4.:/5 (31 download)
Download or read book The Eastern Hemlock written by Clarence Ralph Letteer and published by . This book was released on 1916 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Chelcy R. Ford
Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.3/5 (91 download)
Download or read book Xylem Transport Models Optimize Effectiveness of Systemic Insecticide Applications for Controlling Hemlock Woolly Adelgid (Adelges Tsugae) written by Chelcy R. Ford and published by . This book was released on 2010 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hemlock woolly adelgid (HWA, Adelges tsugae Annand) is causing widespread decline and mortality of eastern hemlock trees (Tsuga canadensis (L.) Carr.). Stem injection of insecticide is widely used as a control measure, but its effectiveness depends on individual tree hydraulic characteristics. Recent work has shown that eastern hemlock daily water use is exponentially related to tree diameter, with smaller-diameter trees using significantly less water than largerdiameter trees. In this study we modeled daily water use for 20 eastern hemlock trees across a range of diameters. Based on expected daily water use and, thus, potential xylem transport of insecticide, we applied a dosage estimated to achieve a lethal and uniform xylem sap concentration of imidacloprid to half the trees (xylem transport treatment), and treated the remaining half based on the manufacturerrecommended dosage (MFR treatment), which is a linear function of tree diameter. At 4 and 56 weeks after treatment, we assessed all trees for the presence or absence of new shoot growth and live HWA population density. We found that both treatment dosages significantly reduced live HWA populations; however, 4 weeks after treatment, live HWA population density was 32 percent lower (LSMEANS) on xylem transport treatment trees compared with MFR treatment trees (treatment by time interaction, P = 0.006). Both treatment dosages also significantly increased the proportion of new shoot growth; however, over time xylem transport treatment trees had a significantly greater increase in new shoot production compared with MFR treatment trees. We conclude that dosages based on a xylem transport model not only significantly improved tree health more than the trees receiving the current recommended dosage, but also caused greater reductions in the live HWA population. Improving treatment dosages would reduce treatment cost, nontargeted effects, and would allow land managers to treat a greater number of trees.
Author :
Publisher :
ISBN 13 :
Total Pages : 32 pages
Book Rating : 4.:/5 (319 download)
Download or read book Biological Control of Hemlock Woolly Adelgid written by and published by . This book was released on 2004 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
