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 47 for “"neonicotinoid"”.
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NEONICOTINOID TOXICITY IN REPRODUCTIVE HONEY BEE CASTES
… increased exposure to pesticides, particularly neonicotinoid insecticides. This has spiked re-evaluation of neonicotinoid use in agriculture and has heightened the need to enhance pesticide risk assessment. Currently, pesticide risk assessment for pollinators is based on assays focused …
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Assessing Potential Solutions to Mitigate Pollution from Neonicotinoid Seed Coatings
Thiamethoxam and clothianidin are two neonicotinoids used in seed coatings for crops such as corn and soybeans. Both neonicotinoids have high solubility in water, so they are prone to transport via leaching and runoff. This thesis is comprised of two studies that evaluated potential solutions to …
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Analysis of Strobilurin Fungicides, Neonicotinoid Insecticides and Degradation Products in Atmospheric Particles
… the simultaneous detection of concentration of 8 neonicotinoid insecticides with 5 degradation products of neonicotinoid insecticides and 7 strobilurin fungicides in the particle phase of atmospheric samples. Detection limits ranged from 0.5 to 3 ng/mL and the recovery percent ranged between 83.5% …
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Evaluating Agricultural Best Management Practices to Mitigate Neonicotinoid Transport in Water and Soil
The use of agrochemicals, like neonicotinoid insecticides can threaten human and environmental health when they are transported from agricultural fields. To minimize environmental impact of neonicotinoid pesticides to non-target organisms, it is important to quantify the movement of neonicotinoids …
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Toxicological Analysis of the Neonicotinoid Insecticide Imidacloprid to Honey Bees, Apis mellifera, of Different Colonies
… While not the single cause of colony loss, the neonicotinoid insecticides elicit sublethal effects to honey bees that could increase their sensitivities to other stressors that affect colony health. Previous studies found that honey bees have differential sensitivities to the neonicotinoid …
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Spatiotemporal Patterns of Distribution and Drivers of Neonicotinoid Insecticide Fate in Canadian Prairie Pothole Wetlands
… for the protection of major agricultural crops, neonicotinoids are the fastest-growing class of insecticides used against a broad spectrum of insect pests. Although neonicotinoid toxicity toward non-target organisms (e.g., bees, aquatic insects) has been well-studied, less is known about their …
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Assessing the Effects of Chronic Neonicotinoid Insecticide Exposure on Aquatic Insects using Multiple Experimental Approaches
Neonicotinoid insecticides are among the most widely used plant protection products in industrialized agriculture, and are hypothesized to be contributing to losses in non-target insect biodiversity. The lack of toxicological data evaluating the effects of neonicotinoids restricts the ability of …
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A Study of Neonicotinoid Seed Treatments in Bt Maize: Insect Resistance Management, Efficacy, and Environmental Fate
… in the United States (US) is treated with a neonicotinoid seed treatment (NST), and transgenic (GMO) maize, Zea mays L. (Poaceae), that produces insecticidal toxins by way of genes derived from Bacillus thuringiensis (Bt), occupies more than 75% of maize acreage. Among a variety of secondary …
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Sub-lethal and lethal effects of a neonicotinoid pesticide on the development of Northern leopard frog tadpoles.
<p>Well-known global declines in amphibian populations have sparked decades of studies into potential causes (Stuart et al. 2004). Pesticides are a suspected contributor to declining populations (Bruhl et al. 2013). Imidacloprid is the most widely used insecticide in the world, but few studies have …
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Quantification of neonicotinoid residues in soils and dust drift in conservation reserve program fields in Illinois, USA
Neonicotinoids, a new class of systematic insecticides, are commonly used as seed coat treatment for crop protection. In the United States, neonicotinoid-treated seeds are planted on most corn acres and over half of the soybean acres. Neonicotinoids are also registered to use on other major field …
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The effect of dietary neonicotinoid supplementation on innate and adaptive immune responses to porcine reproductive and respiratory syndrome virus
Neonicotinoids are currently the most widely used insecticides in the world to treat crops and seeds in the commercial agricultural industry. Acting as nicotine analogues neonicotinoids signal to α-bungarotoxin (α-BT) sensitive insect nicotinic acetylcholine receptors (nAChR), which are expressed …
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Chronic contact exposure to realistic soil concentrations of a neonicotinoid insecticide represents a potentially important and unexplored route of exposure for ground nesting bees
… over the past two decades is the neurotoxic neonicotinoid insecticides. Neonicotinoids are a widely used group of compounds that are often applied preemptively to protect plants from pestiferous insects. Due to their systemic nature, they are found throughout treated plants, including in …
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Evaluation of native bee nesting rates and beetle community assemblages in the presence of clothianidin in the soil of natural areas
The neurotoxic insecticide class of neonicotinoids has become one of the most widely used groups of insecticides in recent years. They exhibit long half-lives and have the potential to linger in the environment and affect arthropod communities long after application. Many studies have looked at the …
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Environmental Fate of Animal Manure-associated Antibiotics and Seed-coated Pesticide in Soils
… increased antibiotic resistance. New generation, neonicotinoid pesticides pose a threat to aquatic ecosystem health due high water mobility and increased potential for non-target exposure. The objectives of this research were to develop a sensitive, analytical method for quantification of …
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Measuring the exposure of Songbird Nestlings to Neonicotinoids in Natural and Agricultural Nest Sites
Neonicotinoid insecticides such as imidacloprid (IMI) have been under scrutiny for their damage on non-target invertebrates. However, recent literature suggests that grassland birds are experiencing population declines concurrently with increased IMI use. Field research was conducted to test the …
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Investigating host plant selection of harlequin bug, Murgantia histrionica (Hahn), in order to improve a trap cropping system for its management
… of HB, including trap cropping and systemic neonicotinoid insecticide applications. Potential trap crops, mustard (Brassica juncea "Southern Giant Curled" ), rapeseed (B. napus "Athena"), rapini (B. rapa) and arugula (Eruca sativa) were preferred over collard (B. oleracea "Champion"), and a …
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The effects of environmental factors on honey bee morbidity
… First, I examine whether being located near neonicotinoid seed treated crops increases honey bee morbidity. Second, I examine if forage availability and weather affect honey bee health. Third, I provide a demonstration of how the biological modeling of environmental factor effects on honey …
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Evaluation of Economic Injury Levels and Chemical Control Recommendations for Rice Stink Bug (Oebalus Pugnax) in Louisiana
… insecticides with that of a new product from the neonicotinoid class of insecticides. Experiments were carried out in the laboratory, small field plots, and commercial fields across Louisiana. Results from efficacy trials showed that the neonicotinoid was comparable to pyrethroid products used …
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Spread of Red Imported Fire Ant, Solenopsis invicta, in Virginia and effects of sub-lethal exposure to agrochemicals on its behavior
… residue on the behavior of S. invicta through neonicotinoid exposure. We found detectable levels of neonicotinoids in the soil of the ant mounds as well as in the ants themselves. In addition, we investigated the effects of dietary exposure to imidacloprid on foraging behavior in a laboratory …
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Evaluation of Safening Effects to Herbicides Conferred via Insecticide Seed Treatments in Soybean (Glycine max) and Grain Sorghum (Sorghum bicolor)
… as seed treatments prior to planting, some neonicotinoid insecticides can safen rice to drift from both glyphosate and imazethapyr. Since insecticide seed treatments are commonly used in many crop production systems throughout the Midsouth, exploring their ability to reduce injury from …
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