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 20 of 24 for “"resistance management"”.
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Paramilitary imprisonment in Northern Ireland 1969-1999 : resistance, management & release
… their political status through a variety of resistance strategies over the course of the conflict. At different periods over the past thirty years, Ministers and prison managers have acquiesced, denied and re-framed the prisoners’ assertion of political status in their attempts to manage …
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Resistance management of western corn rootworm (Coleoptera: Chrysomelidae) in transgenic Bt maize
… since 2003. However, this pest rapidly evolved resistance to Bt traits expressed in maize for rootworm management. This research examines several aspects of resistance management. A field study was used to quantify how larval density-dependent mortality of western corn rootworm in Bt and non-Bt …
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Optimising fungicide application tactics: using mathematical modelling to understand qualitative and quantitative fungicide resistance management
… by pathogen evolution leading to fungicide resistance and loss of cultivar efficacy (‘cultivar breakdown’). Both fungicide resistance and cultivar breakdown can be characterised as qualitative or quantitative, depending on the genetic basis for resistance/breakdown. Mathematical models have …
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Alternaria Leaf Blight and Head Rot of Broccoli: UAV-Based Disease Detection and Fungicide Resistance Management
… the sustainability of the broccoli industry. Management traditionally relies on quinone outside inhibitor (QoI) fungicides, but recent reports indicate reduced efficacy. The causes for this decline are unclear, whether due to a novel species or resistance within existing species. Additionally, …
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A Study of Neonicotinoid Seed Treatments in Bt Maize: Insect Resistance Management, Efficacy, and Environmental Fate
… reduced insecticide use for WCR, and insect resistance poses the greatest threat to its utility. To delay resistance to Bt traits, in 2010 the US Environmental Protection Agency (EPA) approved a "refuge-in-a-bag" (RIB) insect resistance management (IRM) strategy, where 5% of seeds do not …
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Sublethal effects of Bacillus thuringiensis Berliner on the diamondback moth, Plutella xylostella (L.), and its natural enemy, Cotesia plutellae Kurdjumov : implications for resistance management / by Lynne Grbin.
… influence of C. plutellae on the evolution of resistance to Bt in a diamond-back moth poulation.
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Using epidemiological principles and mathematical models to understand fungicide resistance evolution
… This can lead to the spread of fungicide resistance in the pathogen population, which leads to a reduction in efficacy of disease control and loss of yield. In this thesis, we use mathematical modelling to investigate how the spread of fungicide resistant pathogen strains can be slowed, …
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Value of Cover Crops in Suppressing Weeds and Protecting Cotton Yields and Likelihood of Residual Herbicide Carryover to Cover Crops
<p>Weed-resistance management has become a topic of concern for modern agriculture. Cost related to herbicide usage has increased greatly due to evolution and proliferation of resistant weeds. Therefore, experiments were conducted to investigate the potential for using cover crops to suppress …
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The movement behavior and reproductive ecology of western corn rootworm beetles (coleoptera: chrysomeliae) in Bt cornfields with structured and seed blend refuges
… proteins since 2003. To slow the evolution of resistance to Cry proteins, the Environmental Protection Agency mandated an insect resistance management (IRM) plan requiring the planting of non-Bt refuges as structured blocks or randomly distributed (seed blends) within Bt cornfields. Refuges …
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Inheritance and fitness costs Of field-derived resistance To Cry3Bb1 corn by western corn rootworm
… non-Bt corn function to delay the development of resistance to these toxins. The greatest delay in resistance development is expected when the inheritance of resistance is recessive and there are associated fitness costs. We characterized the inheritance of resistance of two strains of western …
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Resistance to change in UK universities : a Habermasian perspective
… the potential for argumentation as a form of resistance management during change within the context of UK Higher Education Institutions. Resistance to change is an area that has received considerable attention, with many scholars attributing it as a significant reason why change initiatives …
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Inheritance, fitness costs, and potential mechanisms of resistance for western corn rootworm larvae surviving Bt corn
… virgifera virgifera LeConte, has developed resistance to most control tactics used to manage it. Transgenic corn varieties that express insecticidal proteins from the bacterium Bacillus thuringiensis Berliner (Bt), cause mortality to target pests when ingested. In an attempt to delay …
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The cabbage whitefly, aleyrodes Proletella: causes of outbreaks and potential solutions
… In order to test the contribution of insecticide resistance to these outbreaks, a leaf-dip bioassay method was developed. Resistance to several pyrethroids was found in multiple populations in Lincolnshire and Kent, with similar patterns between compounds but differing magnitudes of resistance. …
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Forward and reverse genetic approaches to investigate cellulose biosynthesis in Physcomitrium patens
… CBI indaziflam, with a unique mode of action for resistance management, which prevents plant growth by inhibiting cellulose biosynthesis. Arabidopsis thaliana indaziflam resistant mutants were identified through forward genetic screening. Since indaziflam is also active in moss Physcomitrium …
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Understanding the Interaction of Mesotrione and Atrazine in Redroot Pigweed (Amaranthus Retroflexus)
… and atrazine and their impact on herbicide resistance stewardship and weed control efficacy. Mesotrione and atrazine are herbicides primarily used in corn, or maize. Herbicide resistance and a reduced number of new chemistries emerging to the market have led to an increased need in …
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Phytophthora nicotianae: Fungicide Sensitivity, Fitness, and Molecular Markers
… whether Phytophthora species have developed resistance to this compound and to investigate fungicide resistance management strategies. Phytophthora nicotianae, a destructive pathogen of numerous herbaceous and some woody ornamental plants, was used as a model system. P. cinnamomi, a major …
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New Herbicide Strategies for Weed Management in Pumpkin and Soybean and Potato Vine Desiccation
… injury. Palmer amaranth has developed resistance to six different herbicide modes of action. The weed grows rapidly and is best controlled <10 cm in height. To control glyphosate and ALS- resistant biotypes, fomesafen plus dicamba were applied at first postemergence (POST) to small …
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Field-evolved resistance to Cry3Bb1 corn by the western corn rootworm: Investigations of resistance, emergence, node-injury ratings, and fitness
… western corn rootworm has repeatedly developed resistance to management techniques such as crop rotation (by ovipositing in non-corn crops) and some conventional insecticides, which supports the expectation that evolution of resistance by the western corn rootworm is the main threat to the …
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Modeling insect resistance to transgenic corn and cowpea
… covered over 66 million hectares in 2011. Insect resistance management (IRM) is implemented to protect the efficacy of commercial transgenic crops expressing Bacillus thuringiensis toxins because the benefits of the pest susceptibility to Bt toxins is considered as a common good. Simulation models …
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Stability evaluation of selected anthelmintic macrocyclic lactone compounds and formulations
… decades has resulted in a global anthelmintic resistance problem. Given the lack of new molecules, anthelmintic resistance management techniques mainly rely on the use of mixtures of ML substances with anthelmintics from different chemical classes (e.g. levamisole and closantel). ML …
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