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 17 of 17 for “"non-target effects"”.
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Do Mosquito Pesticides Harm Their Natural Enemies? Ecological Impacts and Non-Target Effects of Larvicides on Mosquito Predators
… presence. I examined lethal and behavioral effects of IGRs and SFs on predatory insects. Surface films were lethal to Laccophilus adults (Coleoptera: Dytiscidae) at recommended and high concentrations. Dragonfly nymph location preference in aquariums varied between SFs and IGRs. Laccophilus …
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Prey-mediated effects of imidacloprid on Laricobius nigrinus (Coleoptera: Derodontidae) and Sasajiscymnus tsugae (Coleoptera: Coccinellidae), two predators of hemlock woolly adelgid
Prey-mediated effects of imidacloprid were evaluated for Laricobius nigrinus Fender and Sasajiscymnus tsugae Sasaji and McClure after feeding on hemlock woolly adelgid (HWA), Adelges tsugae Annand (Hemiptera: Adelgidae). Two methods were evaluated for detecting imidacloprid in hemlock tissues: a …
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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
In the face of widespread declines, the non-target effects of pesticides on ecologically and economically important bees are an area of growing concern. One class of pesticides that has gained considerable attention over the past two decades is the neurotoxic neonicotinoid insecticides. …
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Evaluating Entomopathogens for Control of <i>Melanotus communis</i> (Coleoptera: Elateridae), in Virginia
… constrained by environmental regulations, non-target effects, and concerns regarding long-term sustainability. Consequently, there is an urgent need for alternative, ecologically informed management strategies. The utilization of naturally occurring entomopathogens formulated as …
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Thermal biology and establishment potential of two non-native candidate biological control agents, Nesidiocoris tenuis Reuter (Hemiptera: Miridae) and Lysiphlebus testaceipes (Cresson) (Hymenoptera: Braconidae, Aphidiinae), in the U.K.
… Europe and would therefore have little or no non-target effects on native species in such regions, thereby constituting a ‘safe’ candidate for release. Additionally, investigations into temperature-related thresholds indicated that \(N.\)\(tenuis\) would be an effective control agent against …
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Host plant associations of two cochineal insect species, Dactylopius ceylonicus and D. opuntiae (Dactylopiidae: Hemiptera), on the invasive cactus species Opuntia monacantha, O. ficus-indica and a possible hybrid cactus, in South Africa
… cacti and therefore pose minimal risk of non-target effects in the Old World where there are no native Cactaceae. However, the ability of cochineal to use more than one host plant species has validated reports of inadvertent displacement of Dactylopius ceylonicus (the original agent …
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Direct and indirect effects of native and invasive plants on mosquito ecology
… This dissertation examines direct and indirect effects of understory shrubs, including species both native and invasive to North America, on the ecology of Culex pipiens, an important vector of West Nile virus in the northeastern and midwestern United States. Laboratory and field bioassays …
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ASSESSING THE PERFORMANCE OF SAMPLING DESIGNS FOR MEASURING ABUNDANCE OF UNDERSTORY PLANTS AFTER FOREST RESTORATION
… is essential for understanding efficacy and non-target effects of management and restoration activities. However, ability to assess changes in abundance of understory plants that result from disturbance may be hampered by inappropriate sampling methodologies. Conventional methods for sampling …
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ASSESSING THE PERFORMANCE OF SAMPLING DESIGNS FOR MEASURING ABUNDANCE OF UNDERSTORY PLANTS AFTER FOREST RESTORATION
… is essential for understanding efficacy and non-target effects of management and restoration activities. However, ability to assess changes in abundance of understory plants that result from disturbance may be hampered by inappropriate sampling methodologies. Conventional methods for sampling …
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Population ecology of the red admiral butterfly (Bassaris gonerilla) and the effects of non-target parasitism by Pteromalus puparum
… summers, which was probably due to the negative effects of drought on the quality and quantity of the larval host plant Urtica ferox Forst. A life table study showed that egg parasitism by the unidentified scelionid Telenomus sp. was the largest mortality factor for the pre-imaginal stages of B. …
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Effect of herbicides on Cylindrocladium crotalariae and the cylindrocladium black rot (CBR) disease of peanut
The effects of herbicides on axenic growth of Cylindrocladium crotalariae and on the development of CBR in the greenhouse and in the field was studied. In laboratory tests, dinitramine at 1, 5, and 10 ug/ml increased axenic growth of two isolates of C. Crotalariae in herbicide-amended …
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Prevention, Control and Eradication of Aquatic Invasive Species
… to low practicality, high expense, undesirable non-target effects and a lack of known efficacy. Similarly, as suppression techniques are not always successful, or necessarily suitable for all field scenarios, there is a clear and urgent need to develop readily-available control methods, which …
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Impacts of organic and conventional neurotoxic pesticides on a pest and a pollinator in almond agroecosystems (Prunus dulcis)
… receptors. Although used against specific target pests, both spinosyns and neonicotinoids are broad-spectrum insecticides and thus can have non-target effects on beneficial arthropods in agroecosystems, including pollinators. In this study, focused on the almond production system in …
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The Alydidae (Broad-Headed Bugs) of Virginia and Their Pest Management in Edamame
… similar to neonicotinoids, but with reduced non-target effects; the diamide cyclaniliprole, and a novel venom-like peptide insecticide, GS-omega/kappa-Hxtx-Hv1a. Each of the insecticides caused significant mortality of Alydus eurinus (Say) adults. This thesis serves as a starting point in …
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An agent-based model to simulate virus-based biocontrol for the soybean cyst nematode, Heterodera glycines
… integrated management plan (IPM) that combines non-host crop rotations (frequently with corn) and planting SCN-resistant cultivars. SCN cyst diapause–which allows SCN to persist in the soil for several years–limits the effectiveness of alterate-year crop rotations. Furthermore, evidence that the …