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 68 for “"Pyrethroid"”.
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Factors influencing pyrethroid barrier spray effectiveness against Aedes mosquitoes
… conducted to evaluate the efficacy of different pyrethroid barrier treatments against Ae. albopictus mosquitoes, and to examine the impact of the most effective treatment on local mosquito populations when applied to suburban residences. Three pyrethroids were examined in these studies: Demand® …
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Analyses, persistence an degradation of the synthetic pyrethroid insecticides permethrin and fenvalerate
… on persistence and degradation of the synthetic pyrethroid insecticides, permethrin and fenvalerate, were carried out under natural environmental conditions of the Niagara Peninsula. Permethrin and fenvalerate were treated on apple foliage atrat~s of 0.21 kg(AI)!ha and 0.14 kg(AI)/ha, …
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Identifying mechanisms of pyrethroid resistance in the navel orangeworm and novel methods of control
… insecticides to reduce damage by A. transitella. Pyrethroid insecticides have historically been the most heavily applied insecticides registered for A. transitella control because of their efficacy against all life stages, broad-spectrum activity in orchards, and significantly reduced costs …
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Inheritance of resistance to selected pyrethroid insecticides in <i>Blattella germanica</i> (Dictyoptera: Blattellidae)
… to study the inheritance of resistance to pyrethroid insecticides in the Seasons strain of <i>Blattella germanica</i>. This resistance was found to be an autosomal, probably monofactorial character, not linked with the black body or orange body mutants that identify linkage groups 4 and 6. …
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Penetration and permanence of an organophosphate and a pyrethroid in structural wood for insect control
Studies were conducted on the penetration and permanence of 1.0% chlorpyrifos [0,0-diethyl 0-(3,5,6-trichloro-2-pyridyl) phosphorothioate], formulated as Dursban® TC (Dow Chemical Co.), in pine (Pinus spp.), spruce (Picea spp.), and fir (Abies spp.). Results indicated the highest degree of …
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Changes in the Murine Nigrostriatal Pathway Following Pyrethroid and Organophosphate Insecticide Exposure: An Immunohistochemical Study
… PD. The insecticides selected for study were the pyrethroid permethrin (PE) and the organophosphate chlorpyrifos (CP), both of which possess properties that could damage or disrupt the nigrostriatal pathway, which is the principal neurodegenerative target in PD. The present study examined possible …
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What is the best chemical approach to estimate the bioavailability of pyrethroid insecticides to benthic invertebrates?
… toxic, rapidly biotransformed compounds, such as pyrethroid insecticides. This class of compounds is of particular concern due to frequent environmental detection in sediments at concentrations lethal to benthic species. This research has four specific goals: Determining exposure conditions that …
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The synthetic pyrethroid Ectiban permethrin as a treatment in the pest management of flies in caged-layer poultry houses
… of my research was to evaluate the synthetic pyrethroid permethrin (Ectibantm permethrin, ICI, Americas, Inc.) (Fig. 1) as a potential treatment in the integrated control of synanthropic flies in poultry houses. I used a variety of application techniques including feed additive, direct topical …
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Oviposition and dispersal responses of the two spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) to fenvalerate and permethrin residues in soybeans Glycine max (L) Merrill
… at two levels of residue deposition. When pyrethroid-free leaf surface was available, nearly all eggs were found on the untreated surface, away from the pyrethroid residues. When pyrethroid-free leaf surface was not available, a substantial number of eggs were found suspended by silk …
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Phenology and Management of Annual Bluegrass Weevil on Virginia Golf Courses
… climate. Reported cases of ABW resistance to pyrethroids (IRAC Group 3) continues to grow in the northeast, yet no pyrethroid-resistance cases have been reported in Virginia outside of the metropolitan Washington, D.C. For this thesis, I confirmed the widespread distribution of ABW across …
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Quantification of pyrethroid and organophosphate metabolites in hair and urine samples of rural children from the Western Cape, South Africa using the two-dimensional gas chromatography-mass spectrometry
Extensive use of organophosphates (OPs) and pyrethroids (PYRs) in the Western Cape's farming regions raises significant health concerns, particularly for children, whose developing bodies are more susceptible to the toxic effects of these chemicals. Regular monitoring of these insecticide …
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Quantifying the presence of current-use insecticides and toxicity of sediments in urban residential watersheds in central Texas.
In the US, residential use of pyrethroid and other recently developed insecticides has increased substantially in recent years, yet the impact of these insecticides on benthic invertebrates in urban streams is largely unknown. The objective of this study was to determine the presence and …
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Evaluation of Economic Injury Levels and Chemical Control Recommendations for Rice Stink Bug (Oebalus Pugnax) in Louisiana
… showed that the neonicotinoid was comparable to pyrethroid products used most by rice producers in Louisiana. Conversely, in separate experiments the organophosphate malathion was shown to be highly ineffective in small plot tests. Glass-vial bioassays showed elevated levels of pyrethroid …
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The cabbage whitefly, aleyrodes Proletella: causes of outbreaks and potential solutions
… 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. This resistance was expressed to a similar degree by both adults and nymphs. The host plant used …
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Insecticide detoxification in the navel orangeworm Amyelois transitella (Lepidoptera: Pyralidae)
… butoxide synergized the toxicity of the pyrethroids β-cyfluthrin and bifenthrin, which suggests that P450s are involved in detoxification of pyrethroid insecticides. Only azinphos-methyl was a substrate for GSTs in A. transitella, as evidenced by diethyl maleate synergism assays. Neither …
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ΣΧΕΔΙΑΣΜΟΣ ΚΑΙ ΣΥΝΘΕΣΗ ΝΕΩΝ ΠΥΡΕΘΡΟΕΙΔΩΝ
THE MANIFESTATION OF PYRETHROID ACTION IS DEPENDENT ON THE PRESENCE OF CERTAIN STRUCTURE FEATURES AT SUITABLE ARRANGEMENT TO THE MOLECULE. A MODEL OF A PYRETHROID MOLECULE IS PROPOSED WHICH CONSISTS OF A MIDDLE PART MADE UP OF AN ESTER GROUP OR ANOTHER ISOSTERIC GROUP, WHICH IS CONNECTED TO A …
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Evaluation of Multiple Insecticidal Products for Control of the Common Bed Bug (Cimex lectularius (L.))
… than laboratory strain bed bugs to several pyrethroid products. The non-pyrethroid products tested, chlorfenapyr and a non-toxic desiccant dust, killed laboratory strain bed bugs, but were extremely slow acting taking greater than 9 days to kill 50%. None of the insecticides tested, …
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Determining The Occurrence, Fate, And Effects Of Pesticide Mixtures Using The Aquatic Amphipod Hyalella Azteca
… and some current-use pesticides, such as pyrethroids, are strongly hydrophobic, and suspended or bedded sediments, rather than water, would generally be more appropriate matrices for monitoring. Yet sampling of sediments and quantification of residues of these pesticides is often lacking. …
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Evaluation of Alternative Control Methods for Eliminating Insecticide-Resistant Bed Bugs (Cimex lectularius L.)
… been a persistent pest of humans. Conventional pyrethroid-formulation insecticides are known to be ineffective for controlling modern bed bug populations. This study evaluates alternative treatment methods such as whole-home heat, a biological control agent (Beauveria bassiana), and the fumigant …
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