Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Dutch elm disease"”.
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Beetles or Bureaucrats? Reconsidering the United States' Failure to Stop Dutch Elm Disease
… the failure of the United States to address the Dutch elm disease (Ophiostoma ulmi) epidemic that affected American elm (Ulmus americana) across the country. The disease, a fungus carried by beetles between trees, was introduced in 1930 in New York City and slowly spread across the Northeast …
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A survey of Robin (Turdus migratorius) populations in relation to Dutch elm disease control and other insecticide uses
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Zoology, 1961
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Reprogramming the expression of the double-stranded RNA mitovirus OnuMV1c from the mitochondria to the cytoplasm in the fungal pathogen Ophiostoma novo-ulmi
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 …
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Microwave-Assisted Extraction for the Isolation of Trace Systemic Fungicides from Woody Plant Material
… pathogen Ophiostoma ulmi, the casual agent of Dutch elm disease (DED). It was successfully extracted from treated Ulmus americana (elm tree) using MAE with a percent recovery of 395% in 15 minutes. Until now, techniques for rapid and efficient extraction of polar material from wood were …
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A Cryptic Invasion of the Non-Native Siberian Elm (Ulmus Pumila) to Southwest Missouri
… native ecosystems. One such species, Siberian elm, has been shown to have been invading native landscapes across the central and eastern United States since the late 1800s. The natives, American elm and slippery elm, have declined dramatically due to Dutch elm disease throughout the mid- to …
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Isolation of Cellulose Nanofibres: Elucidation of a Novel Approach Utilizing Fungal Pretreatment
… with Ophiostoma Ulmi, a causative agent of Dutch elm disease in Elm trees, has found to reduce the energy requirement to isolate cellulose nanofibres. The treatment has found to bring about internal defibrillation in the fibres by disrupting the hydrogen bonding that holds the hemicellulose …
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The Impact of Neighborhood-Based Processes on Demography and a Decline in Species Diversity in a Temperate Deciduous Forest
… with A. saccharum. Disturbances, including Dutch elm disease, did not help to maintain the rare species, but facilitated recruitment of A. saccharum. The population of A. saccharum grew at an accelerated rate during the 62 years, despite the operation of density dependence of its mortality …
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Preparing plant collections for biological invasions: a study of the effects of emerald ash borer (Agrilus planipennis Fairmaire) through case study analysis
… biological invasions like chestnut blight and Dutch elm disease have caused. In more recent years the exotic, Asian-introduced emerald ash borer (EAB; Agrilus planipennis Fairmaire) has decimated North American ash populations. If public horticulture institutions are to ensure the long-term …
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Investigations into insect chemistry
… of the aggregation sex pheromone of the European Elm bark beetle, <em>Scolytus Multistriatus</em> (Marsham), the latter of which is the principal vector of Dutch Elm disease in the northeast United States. Similarly, appropriately baited lures containing this pheromone and its other constituents …
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Long-Term Disturbance Histories Of Managed And Natural Mixed-Hardwood Forests Of Central Indiana
… forest stands were fenced to eliminate grazing. Dutch elm disease also impacted these stands around the middle of the 20th century by eliminating many large elms (<em>Ulmus<em> spp.) and reducing elms to a predominantly understory species. The relict stand was generally untouched since 1926, with …