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Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (21 download)
Download or read book Implementation and Status of Biological Control of the Hemlock Woolly Adelgid written by and published by . This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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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:
Author : Mark McClure
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (11 download)
Download or read book Biological Control of Hemlock Woolly Adelgid in the Eastern United States written by Mark McClure and published by . This book was released on 2001 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 22 pages
Book Rating : 4.:/5 (652 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 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mark S. McClure
Publisher :
ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (48 download)
Download or read book Biological Control of Hemlock Woolly Adelgid in the Eastern United States written by Mark S. McClure and published by . This book was released on 2001 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
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ISBN 13 :
Total Pages : 2 pages
Book Rating : 4.:/5 (13 download)
Download or read book Hemlock Woolly Adelgid Biological Control written by and published by . This book was released on 2003 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Hugh E. Conway
Publisher :
ISBN 13 :
Total Pages : 1 pages
Book Rating : 4.:/5 (317 download)
Download or read book Introduced Biological Control Agents for Hemlock Woolly Adelgid (HWA) written by Hugh E. Conway and published by . This book was released on 2004 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Albert E. Mayfield (III)
Publisher :
ISBN 13 :
Total Pages : 34 pages
Book Rating : 4.:/5 (132 download)
Download or read book Integrating Chemical and Biological Control of the Hemlock Woolly Adelgid written by Albert E. Mayfield (III) and published by . This book was released on 2020 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael A. Desanto
Publisher :
ISBN 13 :
Total Pages : 154 pages
Book Rating : 4.:/5 (5 download)
Download or read book Biological Control of Hemlock Woolly Adelgid on Ornamental Hemlocks written by Michael A. Desanto and published by . This book was released on 2001 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Abdul Hakeem
Publisher :
ISBN 13 :
Total Pages : 121 pages
Book Rating : 4.:/5 (125 download)
Download or read book Assessment of Factors Affecting Establishment of Biological Control Agents of Hemlock Woolly Adelgid on Eastern Hemlock in the Great Smoky Mountains National Park written by Abdul Hakeem and published by . This book was released on 2013 with total page 121 pages. Available in PDF, EPUB and Kindle. Book excerpt: Eastern hemlock in the Great Smoky Mountains National Park (GRSM) is threatened by hemlock woolly adelgid (HWA), Adelges tsugae Annand (Hemiptera: Adelgidae). To manage this invasive pest in GRSM, ca. 550,000 Sasajiscymnus tsugae (Sasaji and McClure) (Coleoptera: Coccinellidae) and 7,857 Laricobius nigrinus Fender (Coleoptera: Derodontidae) have been released. Limited information is available on their establishment in GRSM. To fill this gap, a study was initiated to assess establishment of these predators and their impact on hemlock health. To determine factors affecting establishment of these predators, 65 release sites were sampled from 2008 to 2012. Several factors were evaluated for their association with establishment and recovery of S. tsugae. Predatory beetle release information, topographic features, and temperature data were obtained from GRSM personnel. These factors were evaluated using stepwise logistic regression and Pearson correlation. High resolution digital imagery was used in conjunction with field-conducted tree-health surveys to test association between S. tsugae and tree health. S. tsugae were recovered from 13 of 65 sites (20%); recovery was significantly associated with older release sites which indicates that S. tsugae may require more time to reach readily detectable levels. Regression analysis indicated that establishment was positively associated with the average maximum temperature seven days following release and elevation. Several significant correlations were found between presence of S. tsugae, and year of release, season of release, and temperature variables. These results indicate that S. tsugae should be monitored for establishment for at least five years following releases to enhance knowledge of establishment. Coexistence of three predatory beetles, S. tsugae, L. nigrinus and L. rubidus, was observed on the same hemlock trees. Significant differences between normalized difference vegetation index values and S. tsugae presence was observed. For understory and overstory hemlock, percent crown transparency, percent live crown, and percent branch dieback was also significant with presence of S. tsugae. Coexistence of S. tsugae and L. nigrinus on eastern hemlock may provide prolonged feeding on HWA. Predictive models would assist land managers in selecting appropriate times and sites for future releases. Application of digital imagery could be used to evaluate other natural enemies in forest landscapes.
Author : Roy van Driesche
Publisher : John Wiley & Sons
ISBN 13 : 1118392582
Total Pages : 360 pages
Book Rating : 4.1/5 (183 download)
Download or read book Integrating Biological Control into Conservation Practice written by Roy van Driesche and published by John Wiley & Sons. This book was released on 2016-05-17 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive species have a critical and growing effect upon natural areas. They can modify, degrade, or destroy wildland ecosystem structure and function, and reduce native biodiversity. Landscape-level solutions are needed to address these problems. Conservation biologists seek to limit such damage and restore ecosystems using a variety of approaches. One such approach is biological control: the deliberate importation and establishment of specialized natural enemies, which can address invasive species problems and which should be considered as a possible component of restoration. Biological control can be an effective tool against many invasive insects and plants but it has rarely been successfully employed against other groups. Safety is of paramount concern and requires that the natural enemies used be specialized and that targeted pests be drivers of ecological degradation. While modern approaches allow species to be selected with a high level of security, some risks do remain. However, as in all species introductions, these should be viewed in the context of the risk of failing to reduce the impact of the invasive species. This unique book identifies the balance among these factors to show how biological control can be integrated into ecosystem restoration as practiced by conservation biologists. Jointly developed by conservation biologists and biological control scientists, it contains chapters on matching tools to management goals; tools in action; measuring and evaluating ecological outcomes of biological control introductions; managing conflict over biological control; and includes case studies as well as an ethical framework for integrating biological control and conservation practice. Integrating Biological Control into Conservation Practice is suitable for graduate courses in invasive species management and biological control, as well as for research scientists in government and non-profit conservation organizations.
Author : Nicholas Dietschler
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)
Download or read book Biological Control of Hemlock Woolly Adelgid written by Nicholas Dietschler and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The hemlock woolly adelgid (Hemiptera: Adelgidae Adelges tsugae Annand) poses a serious threat to hemlocks in eastern North America, and ongoing research is focused on the identification and development of biological controls to protect and manage hemlock resources. Three predators native to the Pacific Northwest of North America that have been the focus of much research are Leucopis argenticollis (Zetterstedt), Leucopis piniperda (Malloch) (Diptera: Chamaemyiidae), and Laricobius nigrinus (Fender) (Coleoptera: Derodontidae). This study addresses the knowledge gap of adult Leucopis spp. emergence patterns, with comparisons to the timing of larval La. nigrinus drop for pupation. Adult Leucopis spp. emergence was observed in the lab from field-collected, adelgid-infested foliage from Washington state in 2019 and 2020. Adult Leucopis spp. were collected daily as they emerged from foliage collections and identified to species using morphological features; a subset was validated using DNA barcoding. Accumulated heating degree days were calculated to compare a standardized emergence timing across collections made at different locations and temperature regimes. The abundance of the two Leucopis spp. and of the combined Leucopis spp. and La. nigrinus varied among sites and years, and no species was consistently more abundant than the other. Evaluations of seasonal emergence trends of the three species determine the predator complex behaves in a temporally stratified and predictable way. Emergence of adult Le. argenticollis was observed first, followed by La. nigrinus larval drop, with Le piniperda emerging at the end of larval drop, and finally a second emergence of Le. argenticollis.
Author : Elizabeth E. Butin
Publisher :
ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (544 download)
Download or read book Biological Control and Cold-hardiness of the Hemlock Woolly Adelgid (Homoptera: Adelgidae) written by Elizabeth E. Butin and published by . This book was released on 2003 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert Miller Jetton
Publisher :
ISBN 13 :
Total Pages : 211 pages
Book Rating : 4.:/5 (246 download)
Download or read book Biological Control, Host Resistance, and Vegetative Propagation written by Robert Miller Jetton and published by . This book was released on 2008 with total page 211 pages. Available in PDF, EPUB and Kindle. Book excerpt: Keywords: biological control, Adelges tsugae, host resistance, hemlock woolly adelgid.
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 : Tim Palmer
Publisher : Penn State Press
ISBN 13 : 0271082518
Total Pages : 181 pages
Book Rating : 4.2/5 (71 download)
Download or read book Twilight of the Hemlocks and Beeches written by Tim Palmer and published by Penn State Press. This book was released on 2018-08-02 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this magnificently illustrated book, conservationist and celebrated outdoors photographer Tim Palmer launches us on a revealing journey among the hemlock and beech trees that have for millennia towered over America’s eastern woodlands. The eastern hemlock and North American beech once thrived from Maine to Georgia, casting shade on trout streams, nourishing wildlife large and small, and gracing uncounted valleys, mountainsides, parks, and backyards. These trees now face tragic decimation by exotic insects and pathogens. Palmer’s photos record the splendor of the cherished hemlock and beech in the same way that pictures of iconic, historic buildings commemorate classic landmarks gone the way of the wrecking ball. And yet, as Palmer underscores in his final chapter, the lessons learned as we address the fate of these trees can help us chart a better course for all wooded landscapes in the years ahead. This story of loss, scientific inquiry, and prospective recovery is vital to understanding nature in our time. As an act of artistic preservation, a report on the science vital to the survival of these trees, and a call to action, Twilight of the Hemlocks and Beeches assures a lasting legacy for this irreplaceable forest community. With more than one hundred exquisite full-color photographs, this book is a must-have for outdoor enthusiasts, natural historians, ecologists, and all lovers of nature.
Author :
Publisher :
ISBN 13 :
Total Pages : 55 pages
Book Rating : 4.:/5 (32 download)
Download or read book Hemlock Woolly Adelgid Biological Control Committee Meeting, January 13, 2004, Lowes Hotel, Annapolis, Maryland written by and published by . This book was released on 2004 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:
