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Dissertations / Theses on the topic 'Dutch elm disease fungus'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Bates, Malcolm Robert. "DNA polymorphism in the Dutch Elm disease fungus Ophiostoma ulmi." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/47767.

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2

Cole, Thomas Edwin. "Molecular studies of virus-like dsRNAs in a diseased isolate of Ophiostoma novo-ulmi." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327031.

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3

Blumenstein, Kathrin. "Endophytic fungi in Elms : implications for the integrated management of Dutch Elm Disease." Thesis, Bangor University, 2015. https://research.bangor.ac.uk/portal/en/theses/endophytic-fungi-in-elmsimplications-for-the-integrated-management-of-dutch-elm-disease(3265a1c5-9910-4ed1-9d1e-c569b68d709d).html.

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Integrated pest management calls for new biocontrol solutions in management of forest diseases. Endophytic fungi that are commonly found in tree tissue may have potential in biocontrol. However, the links between endophyte status and disease tolerance are still unclear, and we know little about the mechanisms by which the endophytes can influence tree pathogens. The first goal of the thesis was to compare the endophyte status in elm (Ulmus spp.) trees with low vs. high susceptibility to Dutch elm disease (DED), caused by Ophiostoma fungi, and to find correlations between endophytes and the sus

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4

Atkins, P. M. "Dutch elm disease : Some aspects of its biology and control." Thesis, University of Salford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376861.

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5

Mitchell, Andrew George. "Population structures and interaction between the aggressive and non-aggressive subgroups of Ophiostoma ulmi." Thesis, University of Bath, 1988. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.234084.

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6

Oghiakhe, Sunday. "Biology and Management of the Dutch Elm Disease Vector, Hylurgopinus rufipes Eichhoff (Coleoptera: Curculionidae) in Manitoba." Entomological Society of America, 2011. http://hdl.handle.net/1993/23811.

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Hylurgopinus rufipes, the native elm bark beetle (NEBB), is the major vector of Dutch elm disease (DED) in Manitoba. Dissections of American elms (Ulmus americana), in the same year as DED symptoms appeared in them, showed that NEBB constructed brood galleries in which a generation completed development, and adult NEBB carrying DED spores would probably leave the newly-symptomatic trees. Rapid removal of freshly diseased trees, completed by mid-August, will prevent spore-bearing NEBB emergence, and is recommended. The relationship between presence of NEBB in stained branch sections and the tot

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7

Betsch, Brody Bly. "A Study of the Impacts of Dutch elm disease, Emerald ash borer, and Amur honeysuckle on the Flora of Rush Run Wildlife Area." Miami University / OhioLINK, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=miami1564514690185145.

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8

Björkroth, Jennie. "Effekter av naturvårdsgallring på förekomsten av lunglav på ädellövträd." Thesis, Linköpings universitet, Biologi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-120089.

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Sun-exposed broad leaved deciduous trees have a great species diversity of epiphytic lichens. In Europe, these trees have decreased dramatically in number as wooded pastures have become overgrown with trees and bushes, and broad leaved deciduous stands have been replaced by planted coniferous trees. These are the main reasons for many lichens depending on deciduous trees being red-listed. Epiphytic lichens in overgrown areas could benefit from conservation thinning, but few studies have been performed on how this type of cutting affects the lichens. In a previous study, the presence of red-lis

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9

Pinchback, Michael. "Construction and functional assignment of a manually annotated expressed sequence tag (EST) library from the pathogenic fungus Ophiostoma novo-ulmi." Thesis, 2006. http://hdl.handle.net/1828/2115.

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A genetic catalogue was generated from expressed sequence tags (ESTs) from the pathogenic filamentous fungus Ophiostoma novo-ulmi. Rather than full sequencing of the entire genome, fragments of each gene being actively expressed at a specific point in time were catalogued and annotated for identity and function. This catalogue represents a resource of considerable depth for the purposes of gene discovery, genetic regulation, protein expression, pathogenicity, and growth state studies. An online database was generated to serve as a powerful tool for downstream applications, facilitating and enh

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10

Dort, Erika. "Reprogramming the expression of the double-stranded RNA mitovirus OnuMV1c from the mitochondria to the cytoplasm in the fungal pathogen Ophiostoma novo-ulmi." Thesis, 2015. http://hdl.handle.net/1828/6578.

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Dutch elm disease (DED) is a debilitating wilt disease that has decimated elm populations globally. The current pandemic of this disease is caused by the ascomycete fungal pathogen Ophiostoma novo-ulmi. A number of strategies have been used to attempt to mitigate the effects of DED but none have met any sustainable success, and the disease continues to have severe ecological and economic impacts. Consequently, research focus has turned to the development of control strategies at the genetic level. One such genetic strategy is the use of naturally occurring fungal viruses (mycoviruses) to induc

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11

Proctor, Robert Henry. "Phytoalexins and dutch elm disease resistance." 1990. http://catalog.hathitrust.org/api/volumes/oclc/23379309.html.

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Thesis (Ph. D.)--University of Wisconsin--Madison, 1990.<br>Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 121-132).

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12

Nasmith, Charles George. "Molecular characteristics associated with the elm response in the Dutch elm disease complex." 2004. http://link.library.utoronto.ca/eir/EIRdetail.cfm?Resources__ID=94672&T=F.

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13

Essenburg, Carol B. "Dutch elm disease and the vegetation composition of Manitoba's bottomland forests." 2009. http://hdl.handle.net/1993/3632.

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In Manitoba's bottomland forests, elms infected with Dutch elm disease are either left standing or removed. Removal creates gaps of various sizes in the canopy whereas dead trees left standing create smaller openings. In order to determine the impact of Dutch elm disease on the forest, 31 5-year old removal gaps, 43 openings beneath dead elms (openings were < 15 years old) and a 15 ha clearing (13 years old) were located along the Red River near Winnipeg, MB. In each of these areas and the adjacent undisturbed forest, vegetation was sampled using 5x5m plots and the point-quarter technique fo

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14

Temple, Bradley Owen. "Molecular aspects of virulence in the causal agent of Dutch elm disease, Ophiostoma novo-ulmi." 2004. http://hdl.handle.net/1828/353.

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15

"Financial and Environmental implications of the Food Bank incorporating the woody biomass as a heating system for their new complex." Thesis, 2015. http://hdl.handle.net/10388/ETD-2015-12-2403.

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The City of Saskatoon is challenged with large quantities of wood wastes such as demolition wastes, construction wastes, and elm tree trims. It has also been recently found that some of the elm trees in Saskatoon might have been infected with the Dutch elm disease, hence, this would lead to the cutting down of trees. The cutting of the affected elm trees will definitely increase the quantities of wood wastes in Saskatoon. The City of Saskatoon might therefore develop the initiative to develop more landfills, as all wood wastes are usually deposited into the landfills. Landfills are usually not

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16

Carneiro, Joyce Silva. "Towards Control of Dutch Elm Disease: dsRNAs and the Regulation of Gene Expression in Ophiostoma novo-ulmi." Thesis, 2013. http://hdl.handle.net/1828/4715.

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Ophiostoma novo-ulmi is the causal agent of Dutch elm disease (DED) which has had a severe impact on the urban landscape in Canada. This research program focused on developing molecular genetic strategies to control this pathogenic fungus. The first strategy involved the development of RNA interference (RNAi) for the down-regulation of genes involved in pathogenicity. An efficient RNAi cassette was developed to suppress the expression of the endopolygalacturonase (epg1) locus which encodes a cell-wall degrading enzyme. This epg1-RNAi cassette significantly reduced the amount of polygalactu

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17

SROGONČÍK, Jakub. "Rozšíření jilmů v Novohradských horách a podhůří (historie a současnost)." Master's thesis, 2013. http://www.nusl.cz/ntk/nusl-154186.

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The aim of this thesis was to find out and map the occurrence of elm trees in Novohradske Mountains and in parts of the surrounding foothills. There is a natural occurrence of Wych elm (Ulmus glabra) on the respective territory which was confirmed by my research. I also managed to find six Field elm trees (Ulmus minor) that are not to be found on this territory naturally. A natural occurrence and purposeful growing of Wych elm tree (Ulmus glabra) is also proved in historical records dating as far back as 17th century when the respective territory was part of the Buquoy manor. During my field r

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18

Veilleux, Jonathan. "Establishment of Scolytus schevyrewi Semenov (Coleoptera: Curculionidae: Scolytinae) in the Prairies: life cycle, hosts and impact." 2012. http://hdl.handle.net/1993/8859.

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The banded elm bark beetle, Scolytus schevyrewi, was first observed in Canada in Alberta in 2006. In 2007, it was found in Manitoba and Saskatchewan. Its hosts include the American elm and so, it has the potential to transmit Dutch elm disease. The beetle was studied in six communities in 2009–2011 in Manitoba and Saskatchewan to learn about its biology in the Prairies. Baited sticky traps revealed that the adult flight period is from June until October, with a peak in late summer. Unbaited sticky traps and trap logs revealed that stressed Siberian elm is the preferred host. Although S. schevy

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19

Kassatenko, Irina. "Characterization of a new mitovirus OMV1c in a Canadian isolate of the Dutch Elm Disease pathogen Ophiostoma novo-ulmi 93-1224." Thesis, 2012. http://hdl.handle.net/1828/3949.

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The fungal pathogen Ophiostoma novo-ulmi is the causal agent of Dutch elm disease (DED) and has been responsible for the catastrophic decline of elms in North America and Europe. Double-stranded RNA (dsRNA) viruses are common to all fungal classes and although these viruses do not always cause disease symptoms, the presence of certain dsRNA viruses have been associated with reduced virulence (hypovirulence) in O. novo-ulmi. A new mitovirus was found in a Canadian isolate of O. novo-ulmi (93-1224) and has been named Ophiostoma mitovirus 1c (OMV1c). The positive strand of the dsRNA of OMV1c w

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20

Meier, Fred G. "In vitro mansonone production and vascular staining in populations, trees within populations and individual progeny of Ulmus americana L. in relation to Dutch elm disease." 2009. http://hdl.handle.net/1993/3724.

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Dutch elm disease (DED) is a vascular wilt disease which has decimated populations of American elm (Ulmus americana L.) throughout North America. Mansonones are a family of phytoalexins found within the genus Ulmus and are thought to be involved in the resistance mechanism to DED. There have been no previous studies which have investigated the variation in production of mansonones within a large group of related elm. The purpose of this study was to investigate the production of mansonones within progeny from several parent trees within 6 populations of American elm located in Manitoba, Canada

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