Download or read book Consequences of Sudden Oak Death written by Letitia Barrett Brown and published by . This book was released on 2007 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sudden Oak Death and Phytophthora Ramorum written by John Kliejunas and published by CreateSpace. This book was released on 2010-09-01 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sudden oak death and Phytophthora ramorum, both first recognized about a decade ago, have been the subject of hundreds of scientific and popular press articles. This document presents a comprehensive, concise summary of sudden oak death and P. ramorum research findings and management activities. Topics covered include introduction and background, identification and distribution, the disease cycle, epidemiology and modeling, management and control, and economic and environmental impacts. U.S. Department of Agriculture, Forest Service. Includes discussion of: Causal Agent, Distribution, Hosts, Diagnosis, The Disease Cycle, Modeling Disease Distribution and Spatial-Temporal, Patterns of Mortality, Management and Control, Economic and Environmental Impacts of Phytophthora ramorum.
Download or read book Sudden Oak Death Second Science Symposium written by and published by . This book was released on 2004 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sudden Oak Death written by Joseph G. O'Brien and published by . This book was released on 2002 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Assessing the Impact of Sudden Oak Death on Crown Fire Potential in Tanoak Forests of California written by Howard Gregory Kuljian and published by . This book was released on 2010 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sudden Oak Death written by and published by . This book was released on 2019 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long term Growth Sudden Oak Death Assessment and Economic Viability of Coast Live Oak in Three California Counties written by and published by . This book was released on 2004 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Protecting Trees from Sudden Oak Death before Infection written by and published by UCANR Publications. This book was released on with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Detection and Ecology of Sudden Oak Death written by Frances Seton Ockels and published by . This book was released on 2006 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Phytophthora ramorum, the causal agent of Sudden Oak Death, is a recently discovered disease, which was first observed killing tanoaks in Mann County, California in the mid 1 990s. Since then the pathogen has been found in fourteen coastal counties in California and one southwestern county in Oregon and has killed thousands of oaks and tanoaks in forests and urban-forest interfaces. In these areas, the pathogen is having a dramatic ecological impact by changing resource availability upon which many invertebrates and vertebrates depend. Additionally, P. ramorum infects a large variety of ornamental plants that are common in the nursery industry. Many of the host species of P. ramorum are widely distributed by nurseries in California, Oregon, and across the U.S. The disease could spread across the U.S. by transporting nursery stock infected with P. ramorum. A single escape from an infested nursery into surrounding woodlands or forests in areas potentially conducive to development of the disease could be devastating. Due to the imminent threat of the pathogen spreading and to the limited knowledge of the relatively newly discovered pathogen, this research had two main objectives. The first objective was to monitor the spread of P. ramorum in the eastern U.S., while the second objective was to investigate ecological aspects of the disease in the forests of California by examining the response of coast live oaks and ambrosia beetles to P. ramorum infection. The spread ofF. ramorum was monitored through our participation in the U.S. Forest Service National Phytophthora ramorum Survey of Forest Environments in 2004 and 2005. The survey focused on prevention of spread of P. ramorum through early detection of the pathogen in nursery and forest settings. In 2004, 110 sites were surveyed in the North Central region and 620 samples were processed and analyzed, while in 2005, 168 sites were surveyed with 263 samples processed and analyzed. The results for the 2004 and 2005 surveys conducted in Ohio, Indiana, Iowa, Illinois, Missouri, and Wisconsin showed that the areas surveyed were P. ramorum free. The second part of this research investigated P. ramorum infected coast live oaks in the native oak woodlands of California. Specifically, the defense responses of oaks infected with P. ramorum were investigated. Additionally, the affect of Cambistat treatment on the defense responses of P. ramorum infected and healthy coast live oaks was examined. Tissue of infected and healthy coast live oaks not treated with Cambistat and tissue of infected and healthy coast live oaks treated with Cambistat were sampled, extracted, and analyzed by High Pressure Liquid Chromatography (HPLC) for the identification of pathogen induced secondary metabolites. Five secondary metabolites, gallic acid, tyrosol, and three unknown compounds were identified as being present in different amounts in sampled phloem, suggesting that at least some of these compounds might be associated with resistance to this pathogen. Furthermore, a new association between opportunistic ambrosia beetles and bleeding cankers on coast live oaks infected with P. ramorum was investigated. It is unknown how ambrosia beetles select oaks infected with P. ramorum for colonization. The goal of this part of the study was to identify volatile chemicals emitted from bleeding cankers that might be involved in attracting beetles to the diseased oaks. Volatiles were collected using Solid Phase Microextraction (SPME) fibers from vials containing bark exudate typical of P. ramorum-infected trees, infected phloem, and healthy phloem. The volatile compounds were analyzed by Gas Chromatography- Mass Spectrometry (GCMS). Eight phenolic compounds, 4-ethylphenol, 4-ethylguaiacol, 4-propylguaiacol, ethyihexanol, isooctyl mercaptoacetate, tyrosol, N-acetyltyramine, and antiarol were identified by comparing their mass spectra to two libraries, the Wiley Registry of Mass Spectral Data and the Nist Library. Future research, such as trapping experiments and coupled gas chromatography -- electroantennographic detection (GC-EAD) will determine if these compounds are behaviorally active.
Download or read book Sudden Oak Death Phytophthora Ramorum written by and published by . This book was released on 2019 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Landscape Heterogeneity on the Emerging Forest Disease Sudden Oak Death written by T. Emiko Condeso and published by . This book was released on 2005 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Oaks in the Urban Landscape written by Laurence Raleigh Costello and published by UCANR Publications. This book was released on 2011 with total page 225 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication offers a comprehensive look at the management of oaks in urban areas. As development moves into oak woodland areas, more and more oaks are becoming "urban" oaks. Oaks are highly valued in urban areas for their aesthetic, environmental, economic and cultural benefits. However, significant impacts to the health and structural stability of oaks have resulted from urban encroachment. Changes in environment, incompatible cultural practices, and pest problems can all lead to the early demise of our stately oaks. Using this book you'll learn how to effectively manage and protect oaks in urban areas - existing oaks as well as the planting of new oaks. Three key areas are addressed: selection, care, and preservation. You'll learn how cultural practices, pest management, risk management, preservation during development, and genetic diversity can all play a role in preserving urban oaks. Arborists, urban foresters, landscape architects, planners and designers, golf course superintendents, academics, and Master Gardeners alike will find this to be an invaluable reference guide.
Download or read book Consequences of Wildfire in the Sudden Oak Death impacted Forests of the Big Sur Region California written by Maia Moore Beh and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A novel disturbance interaction occurred in the Big Sur region of California's central coast during the summer of 2008 when wildfires occurred for the first time in forests severely impacted by Phytophthora ramorum, a non-native, invasive pathogen. This destructive oomycete pathogen causes sudden oak death, an emerging forest disease that is responsible for the mortality of millions of oaks (Quercus spp.) and tanoaks (Notholithocarpus densiflorus) in coastal forests of California. Ambrosia beetles, opportunistic scolytid beetles, often attack P. ramorum-infected trees and these secondary pests have been shown to hasten mortality. Data collected prior to the fires in a network of forest monitoring plots in Big Sur allowed for the rare opportunity to study the impacts of wildfire on P. ramorum-infested forests. In this thesis, I examined trends in the survival of P. ramorum following wildfires, as well as the landing rates of ambrosia beetles on tanoaks in forests disturbed both by P. ramorum and wildfire. The widespread wildfires of 2008 failed to eradicate P. ramorum from areas of the Big Sur landscape that were known to be already infested with the invasive forest pathogen. Phytophthora ramorum was successfully recovered from streams draining watersheds known to contain the pathogen prior to the fires and from a range of host tissues in burned, previously P. ramorum-infested plots. However, there was a much lower likelihood of recovering P. ramorum from burned plots than unburned plots, even two years following the fires, suggesting that fire did at least reduce the abundance of the pathogen. Recovery of P. ramorum in burned plots was positively correlated with the number of California bay laurels (Umbellularia californica) expressing symptoms of P. ramorum-infection prior to the fires, further highlighting the importance of this sporulating host of the establishment, spread, and persistence of the devastating pathogen. Surprisingly, two other Phytophthora spp., P. pseudosyringae and P. nemorosa, were frequently isolated from new vegetative growth in burned plots that were not known to contain these pathogens prior to the fires. One year following the fires, significantly more ambrosia beetles were trapped on tanoaks in forest plots disturbed both by P. ramorum and fire compared to undisturbed plots and plots with only P. ramorum disturbance in the Big Sur region. While the landing rates of ambrosia beetles are not necessarily equivalent to their actual rates of colonization, increased landing rates in the plots with multiple disturbances suggest that tanoaks in those areas were particularly attractive to ambrosia beetles. Specific host volatiles may have attracted ambrosia beetles to specific tanoaks, and greater quantities of moribund and recently-killed trees in forests affected by both disturbances likely led to greater population densities of ambrosia beetles in those areas. It is unlikely that large population of ambrosia beetles emerging from fire-injured trees will disperse to attack nearby green trees due to the opportunistic nature of ambrosia beetles and the ample supply of recently dead and dying trees in the area. However, given the imperiled state of tanoaks in coastal California due to P. ramorum-caused mortality, even the loss of fire-injured tanoaks to ambrosia beetle attack would have a major impact on the forests of the Big Sur region.
Download or read book Sudden Oak Death Phytophthora Ramorum in Port Orford written by and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sudden Oak Death Caused by a New Species Phytophthora Ramorum written by Susan Frankel and published by . This book was released on 2005 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Invasive Species in Forests and Rangelands of the United States written by Therese M. Poland and published by Springer Nature. This book was released on 2021-02-01 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book describes the serious threat of invasive species to native ecosystems. Invasive species have caused and will continue to cause enormous ecological and economic damage with ever increasing world trade. This multi-disciplinary book, written by over 100 national experts, presents the latest research on a wide range of natural science and social science fields that explore the ecology, impacts, and practical tools for management of invasive species. It covers species of all taxonomic groups from insects and pathogens, to plants, vertebrates, and aquatic organisms that impact a diversity of habitats in forests, rangelands and grasslands of the United States. It is well-illustrated, provides summaries of the most important invasive species and issues impacting all regions of the country, and includes a comprehensive primary reference list for each topic. This scientific synthesis provides the cultural, economic, scientific and social context for addressing environmental challenges posed by invasive species and will be a valuable resource for scholars, policy makers, natural resource managers and practitioners.
Download or read book Stop the Spread of Sudden Oak Death written by and published by . This book was released on 2003 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
