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 10 of 10 for “"entomopathogens"”.
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Evaluating Entomopathogens for Control of <i>Melanotus communis</i> (Coleoptera: Elateridae), in Virginia
… The utilization of naturally occurring entomopathogens formulated as biopesticides provides sustainable options towards Integrated Pest Management (IPM) plans. Accordingly, the objective of this dissertation was to investigate biopesticides for the control of wireworms, specifically M. …
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Development of microbial control for lepidopteran pests of the corn ear
… and in the field on corn. The virulence of the entomopathogens for Ostrinia nubilalis (Hubner) and Spodoptera frugiperda (J. E. Smith) was also evaluated in the laboratory;Three Bt products (HD-1-S-1980, Javelin°ler, and XenTari°ler) and AfMNPV were tested in the laboratory. The relative …
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Agroecosystem management strategies and trophic interactions among herbivores, pathogens and predators
… in annual crops performs the preservation of entomopathogens in the soil resulting in higher virulence and occurrence of microorganisms in agroecosystems; c) herbivores exposed to spores of entomopathogenic fungi reduce their herbivory on the host plant; d) the exposure of herbivore to …
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Impact of Natural Mortality Factors on Populations of the European Corn Borer in Bt- and Non-Bt-Corn Fields in Illinois
… of European corn borers infected by the entomopathogens N. pyrausta and B. bassiana. However, densities of natural enemies were significantly reduced in Bt corn compared with non-Bt corn. If large acreages are devoted to the production of Bt corn, the overall impact on specific natural …
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Host specificity of microsporidia: Physiological and ecological considerations
… represent ecological (field) host specificity of entomopathogens but, if carefully interpreted, may be used as a tool to predict ecological host specificity. I conducted two laboratory studies designed to predict the ecological host range of microsporidia, common protozoan pathogens of insects. In …
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A NEW STRATEGY FOR MOSQUITO BIOCONTROL BASED ON THE IMPROVEMENT OF BACILLUS THURINGIENSIS EFFECTIVENESS
… targeting mosquito larvae are based on the entomopathogens Bacillus thuringiensis var. israelensis (Bti) and Lysinibacillus sphaericus (Lsph). These products, active by ingestion, include Bti alone or in combination with Lsph and are safe for the environment while displaying a high and …
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Documenting the Patterns and Ecological Impacts of a Densovirus on Melissa Blue Butterflies (Lycaeides melissa) and Beyond
… Descriptions of the ecology and evolution of entomopathogens are essential for applications in biological pest control, assessing the consequences of disease in beneficial species, or expanding on general knowledge of disease dynamics. Insect-specific viruses from the family Baculoviridae are …
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Interactions of entomopathogenic fungi and other control agents: mechanism and field potential against Hylobius abietis larvae
… Therefore there is an interest in the use of entomopathogens as biological control agents in integrated pest management. Thus one objective of this work was to assess the efficacy of EPF, EPN and EPF-EPN combinations for H. abietis suppression in the field in order to ultimately determine if …
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Defining genomic drivers of evolution in the entomopathogenic Serratia spp. A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
There is a growing demand for new and sustainable solutions as alternatives to chemical pesticides both in Aotearoa New Zealand and worldwide. Since the early 1990s, isolates of the bacterium Serratia entomophila have been utilised as biocontrol agents, causing amber disease specific to larvae of …
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The biological control of the red clover casebearer in New Zealand : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University
Biocontrol of insect pests represents an important aspect of sustainable crop management that has potential to reduce the current reliance on chemical control measures. However, often the potential of all forms of biocontrol is undermined in contemporary productive systems and their resulting …