Dissertations / Theses on the topic 'Insecticides'
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Bydlon, Frédéric. "Synthèse et mécanisme d'action des chromènes de série précocènes." Paris 5, 1995. http://www.theses.fr/1995PA05P204.
Full textMalima, Robert Chikoja Munyu. "Evaluation of long lasting insecticidal materials and treatment kits and control of pyrethroid insecticide resistant mosquitoes using alternative insecticides on nets." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.536834.
Full textNigond, Jacques. "Intoxications aigues par les insecticides organophosphorés : à propos de 50 cas." Montpellier 1, 1988. http://www.theses.fr/1988MON11205.
Full textNgufor, C. A. "Combining unrelated insecticides for improved control and management of insecticide resistant African malaria vectors." Thesis, London School of Hygiene and Tropical Medicine (University of London), 2015. http://researchonline.lshtm.ac.uk/2124338/.
Full textLind, Robert. "Actions of chloronicotinyl insecticides." Thesis, University of Bath, 1999. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299849.
Full textDavis, Ryan Scott. "An ecological risk assessment for mosquito insecticides." Thesis, Montana State University, 2007. http://etd.lib.montana.edu/etd/2007/davis/DavisR0507.pdf.
Full textLee, Jimmy Jing-Ming 1955. "Studies of Nitrogen-containing Compounds Having Pyrethroid-like Bioactivity." Thesis, University of North Texas, 1989. https://digital.library.unt.edu/ark:/67531/metadc332332/.
Full textAnjum, Farida. "Relative toxicity of insecticides to crucifer pests and their natural enemies : interaction of insecticide and insect behaviours." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/24773.
Full textMehmet, Ceylan. "Insecticide resistance as a biomarker for migration of Culex pipiens and its exposure to insecticides in Britain." Thesis, Queen Mary, University of London, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612578.
Full textJenson, Lacey Jo. "Induction and Inhibition of a Neuronal Phenotype in Spodoptera Frugiperda (Sf21) Insect Cells." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/40929.
Full textMaster of Science
Visetson, Suraphon. "Insecticide resistance mechanisms in the rust-red flour beetle, Tribolium castaneum (Herbst)." Thesis, The University of Sydney, 1991. https://hdl.handle.net/2123/26395.
Full textMaloney, Sarah Elizabeth. "Microbial transformation of synthetic pyrethroid insecticides." Thesis, University of Greenwich, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292367.
Full textUmeda, K., C. Fredman, and R. Fredman. "Insecticides for Whitefly Control in Cantaloupes." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/214751.
Full textRethwisch, Michael D. "Control of Jojoba Looper by Insecticides." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/215720.
Full textUmeda, Kai. "Insecticides for Whitefly Control in Cantaloupes." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/221640.
Full textUmeda, K., G. Gal, and B. Strickland. "Insecticides for Whitefly Control in Cantaloupe." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/221658.
Full textDuarte, Boaventura Debora [Verfasser]. "Characterization of mechanisms of resistance in Spodoptera frugiperda to synthetic insecticides and insecticidal proteins / Debora Duarte Boaventura." Bonn : Universitäts- und Landesbibliothek Bonn, 2021. http://d-nb.info/1231911123/34.
Full textShamu, Shepherd. "The effect of removing tariffs and domestic taxes on insecticide treated nets (ITNs), netting materials and insecticides in Zimbabwe." Master's thesis, University of Cape Town, 2002. http://hdl.handle.net/11427/6952.
Full textThe use of Insecticide Treated Nets (ITNs) has already proved to be a cost effective way of malaria vector control. The important emphasis now should therefore be on how to increase the accessibility and utilization of the mosquito nets through devising viable financing and promotional mechanisms that are sustainable and equitable in the long run. One way of financing ITNs that has been propounded by the Roll Back Malaria (REM) has been the issue of the reduction or elimination of tariffs and domestic taxes on ITNs and their inputs. The purpose of this study was to look at how and in what way this RBM financing policy on eliminating tariffs and domestic taxes on ITNS and their inputs would benefit the consumer given the complex nature of ITN industry operations and the consumer behaviour. The study concentrated on information gathered from net manufacturers and insecticide providers, wholesalers and retailers and some key personnel in the overall ITN industry to gather information on production, sales and marketing trends. The analysis revealed that there are indeed gains to be realized by both the consumer and the private sector if tariffs and taxes are removed, in terms of the increase in demand and supply of the product. The elimination of the 15% tariff on ITN input prices in Zimbabwe, ceteris paribus, would lead to the retail price of ITNs falling by between 4% and 12%. This would result in consumer purchases increasing by between 2% and 11%. The elimination of both taxes, other things constant, would lead to the price falling by between 4% and 23 %, leading to retail purchases increasing by between 2% and 21%. Depending on the price elasticities of demand and supply, the fall in retail prices and the consequent increase in retail purchases are quite substantial in a developing country context where incomes are very low. Sensitivity analysis using different demand and supply elasticities also showed that the elimination of tariffs and taxes on ITNs and their inputs would lead to a substantial fall in retail purchases resulting in retail purchases increasing.
Smith, Petrina. "Development of genetically modified Heliothis baculovirus insecticides." Thesis, Oxford Brookes University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.364073.
Full textProsser, Philip. "Insecticides and birds : informing avian risk assessment." Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288675.
Full textVILLATTE, FRANCOIS. "Acetylcholinesterase d'insectes : resistance et sensibilite aux insecticides." Paris 6, 1998. http://www.theses.fr/1998PA066642.
Full textCamerino, Eugene. "Trifluoromethyl ketones: Potential insecticides towards Anopheles gambiae." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/54015.
Full textFocus was directed towards synthesis of oximes, oxime ethers, and hydrazones as potential prodrugs to prevent immediate hydration and reach the central nervous system. The synthesis of various oximes, oxime ethers, and hydrazones has been shown to give cimpounds toxic to Anopheles gambiae within 3- to 4- fold of the toxicity of propoxur. However, thus far we have not been able to link the toxicity of these compounds to a cholinergic mechanism. Pre-incubation studies suggest that significant hydrolysis of these compounds to TFKs does not occur or 22 h at pH 7.7 or 5.5.
Future work will be directed towards TFKs that have better pharmacokinetic properties. Work will also be directed at synthesis of oxime and hydrazone TFK isosteres to determine the mechanism of action of these compounds.
Master of Science
Rethwisch, Michael D., Michael Meadows, Shari Hagerman, James Thiessen, and John McGrady. "Effects of Lettuce Insecticides Applied at Planting." College of Agriculture, University of Arizona (Tucson, AZ), 1992. http://hdl.handle.net/10150/214518.
Full textPalumbo, John C., F. J. Reyes, L. Carey, A. Amaya, and L. Ledesma. "Interactions Between Insecticides, Spray pH, & Adjuvants." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/214912.
Full textUmeda, Kai. "Whitefly Control with Foliar Insecticides in Cantaloupes." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/214968.
Full textRethwisch, Michael D. "Control of Variegated Grape Leafhoppers by Insecticides." College of Agriculture, University of Arizona (Tucson, AZ), 1990. http://hdl.handle.net/10150/215714.
Full textKerns, David L., and Tony Tellez. "Baseline Susceptibility of Cabbage Looper to Insecticides." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/220013.
Full textHambleton, Faith Ann (Faith Ann Elizabeth). "Effect of pH on the Persistence and Toxicity of Cyfluthrin to Chironomus Tentans." Thesis, University of North Texas, 1992. https://digital.library.unt.edu/ark:/67531/metadc935772/.
Full textRoux, Christine. "Toxicologie environnementale d'un insecticide : études autoradiographiques de la distribution de la radioactivité chez plusieurs espèces animales traitées par la 14C-deltaméthrine." Toulouse, INPT, 1990. http://www.theses.fr/1990INPT018A.
Full textCorcellas, i. Carramiñana Cayo-Eduard. "Estudi dels insecticides Piretroides en mostres biològiques i humanes." Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/462848.
Full textThe present Thesis is about pyrethroid insecticides. They are very used in agrarian, veterinarian and domestic environments. Besides, they are used in Public Health in order to control mosquito vectors of diseases such as malaria and dengue. They are chiral molecules, thus isomeric characteristics are important in their environmental behavior and toxicology. In this thesis, a new method for enantiomeric discrimination of 6 pyrethroids was developed. For the first time a method was able to separate all enantiomers of one pyrethorid, in this case, tetramethrin. Besides, the method was able to differentiate cis enantiomers of bifenthrin, cyfluthrin, cyhalothrin, cypermethrin and permethrin. Pyrethorids were evaluated in unfertile wild bird egg samples, Antarctic mammals, river fishes and dolphins. In 96% of bird eggs residues of pyrethroids were observed. In 100% of all the rest of matrices presented quantifiable levels of pyrethroids except for Antarctic mammal samples. First way of exposure to pyrethroids for these wild species seemed to be diet. However, no biomagnification was described. Long distance transport was discarded since Antarctic samples did not present levels of pyrethrids. Pyrethroids were mostly accumulated in lipid tissues, such as dolphin blubber. The best matrix to future monitoring was described as liver samples, even when for living individuals, superficial blubber sample could be used. Cis isomer of pyrethroids were more bioaccumulated than trans, except in the case of tetramethrin. In this last case, commercial mixtures, which are enhanced in trans isomer, could explain this observation. For the rest of pyrethroids, cis isomer was enhanced because of the preference of trans isomer in the isomer-selective metabolization of most of organisms. Regarding human exposure, breast milk samples from Brazil, Colombia and Spain were analyzed. All samples were positive in the pyrethroid determination analyses. Even when levels in general population seemed to be save, Acceptable Daily Intake values should be reconsidered for breastfed children.
Javed, Naghmy. "How insect acetylcholinesterase has become insensitive to insecticides." Thesis, Queen Mary, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398126.
Full textAnthony, Nicola Mary. "Action of convulsants and insecticides on GABA receptors." Thesis, University of Cambridge, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240117.
Full textKou, Jinghong. "The Neurotoxicity of Insecticides to Striatal Dopaminergic Pathway." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/77991.
Full textPh. D.
Palumbo, John C., Peter C. Ellsworth, and Timothy J. Dennehy. "Cross-commodity Guidelines for Neonicotinoid Insecticides in Arizona." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/146722.
Full textArizona enjoys a sustained recovery from the devastating whitefly outbreaks of the early 1990's. This success is built on an IPM strategy that includes the use of selective and effective chemistry. Admire has been a key soil insecticide protecting vegetables and produce throughout Arizona and is the first member of a burgeoning class of chemistry known as the neonicotinoids. New members of this valuable, reduced-risk, class of chemistry are now available to agricultural producers, placing a burden on users of these compounds to adopt rational plans for sustaining their efficacy. This consensus document represents our best guess efforts to limit and share this chemistry among different agricultural interests. Our goal is to preserve the long-term efficacy of the neonicotinoids and protect growers' interests in sustainable and economical whitefly management. Through identification of crop communities (i.e., "multi-crop", "cotton-intensive", and "cotton/melon") common to Arizona agriculture, we have sculpted sensible plans of use that should allow access to this valuable chemistry for everyone, while protecting it from resistance.
Watson, T. F., and Clay Mullis. "Effect of Various Insecticides on Pink Bollworm Control." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/204083.
Full textDennehy, T. J., J. E. Russell, L. Antilla, and M. Whitlow. "New Insights Regarding Estimating Lygus Susceptibility to Insecticides." College of Agriculture, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/210378.
Full textUmeda, Kai, and Chris Fredman. "Evaluation of Insecticides for Aphid Control in Cabbage." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/214743.
Full textUmeda, Kai, and Gabriel Towers. "Evaluation of Insecticides for Efficacy on Turfgrass Pests." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2008. http://hdl.handle.net/10150/216634.
Full textUmeda, Kai. "Evaluation of Foliar Insecticides for Whiteflies in Cantaloupes." College of Agriculture, University of Arizona (Tucson, AZ), 1999. http://hdl.handle.net/10150/219967.
Full textUmeda, K., D. MacNeil, and D. Roberts. "New Insecticides for Diamondback Moth Control in Cabbage." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/219999.
Full textMatos, Rosa Escórcio Pacavira. "Efeito insecticida de Tephrosia Vogelii Hook. F. no controlo de Sitophilus zeamais Motoschulski (Coleoptera: Curculionidae): uma contribuição para o desenvolvimento rural sustentável em Angola." Doctoral thesis, ISA/UTL, 2011. http://hdl.handle.net/10400.5/3862.
Full textThe main objectives of present work are the development of studies on the potentialities of Thephrosia vogelii substances to control infestations of Sitophylus zeamais on stores maiz in Angola. The methods most commonly used by small farmers in Malange and Huambo to the conservation of agricultural products, are fundamentally the prevention, heat, ventilation, use of wood ashes, dust and leaves from local plants.Most farmers use chilli powder (Capsicum frutescens L.) and Tephrosia spp. The powders of leaves of T. vogelii maily the doses of 1.5 and 2% w/v resulted in 90 and 80% repellency to adults of S. zeamais. With the concentration of 2% w/v, powder of seeds and leaves, caused 21,6 and 21,0% mortality respectively. Even with low mortality after the seeds and leaves treatment, a redution on G1 to 92.8 and 93.2% was observed. With the extracts of the roots, obtained by maceração, hot and cold, mortalities of 46 and 58.0% were reached witj the concentration of 1.10, while the concentration of 1:25 of the of seeds extract, caused mortalities of 82.0% and 90% respectively to hot and cold extraction conditions. The whole plant (a mixture of the several vegetative organs) at the concentration of 1:10, induced 82.0 and 90.0% of mortality both hot and cold respectively. The reduction in the emergency G1 was observed, only in the hot aqueous extracts from leaves and stem, from 56.7% to 61.1% with the concentration of 1:10. Extracts from leaves of T. vogelii obtained with organic solvents, were repellent enough. The extract in methanol and 88 caused 82% mortality, reducing the G1 in 100% at a concentration of 5%. Fumigation with essential oil concentrate, observed mortality of S. zeamais 100% at a concentration of 15 μl/ ml of oil. By diluting the oil in an organic solvent n-hexane caused (100%) mortality, higher concentrations (10 and 15 μl/cm2), corn treated with the oils dissolved in acetone caused mortality (94%) acetate ethyl (96%) and methanol (92%), causing a reduction of emergency 99- 100%-----------------------------------------------O presente trabalho tem como objectivo o desenvolvimento de estudos das potencialidades de subtâncias extraídas de Thephrosia vogelii para combate a Sitophylus zeamais em milho armazenado em Angola. Os métodos tradicionalmente utilizados pelos pequenos camponeses em Malange e Huambo, para conservação de produtos agrícolas, são fundamentalmente a prevenção, o calor, arejamento, o uso de cinzas de madeira, pós e folhas de plantas locais. A maior parte dos camponeses utilizam pós de malagueta (Capsicum frutescens L.) e Tephrosia spp. Os pós de folhas de T. vogelii a 1,5 e a 2% provocaram 90 e 80% de repelência em adultos de S. zeamais. Com a concentração de 2%, os pós de sementes e de folhas, causaram 21,6 e 21,0% de mortalidade respectivamente. Mesmo com baixa mortalidade os pós das sementes e das folhas, reduziram a descendência G1 até 92,8 e 93,2%. Os extractos aquosos das raízes, por maceração a frio e a quente, causaram mortalidade de 46 e 58,0% a 1:10 respectivamente, enquanto que as sementes a quente causaram mortalidade de 82,0% e a frio 90% a 1:25 mL. A planta inteira (mistura das partes vegetativas), na concentração de 1:10, apresentou entre 82,0 e 90,0% de mortalidade por maceração a quente e a frio respectivamente. A redução da emergência G1 somente foi observada nos extractos aquosos a quente de folhas 56,7% e do caule com 61,1% a concentração de 1:10. Os extractos de folhas de T. vogelii, obtidos com os solventes orgânicos, mostraram-se bastantes repelentes. O extracto em metanol causou 82 e 88% de mortalidade, reduzindo a G1 em 100% na concentração de 5%. A fumigação com óleo essencial concentrado, observou-se mortalidade de S. zeamais de 100% na concentração de 15 μl/ mL de óleo. Diluindo o óleo em solventes orgânicos o n-hexano causou (100%) de mortalidade, nas concentrações mais altas (10 e 15 μl/cm2). O milho tratado com os óleos diluídos em acetona, causaram mortalidade de (94%) acetato de etilo (96%) e metanol (92%), provocando uma redução de emergência de 99 a 100%
Goindin, Daniella. "Étude des résisatances aux insecticides et des réponses biologiques aux changements climatiques du moustique Aedes aegypti, vecteur de la Denguen du Chikungunya et du Zika en Guadeloupe." Thesis, Antilles, 2016. http://www.theses.fr/2016ANTI0054/document.
Full textGuadeloupe is an endemic country for Dengue with epidemics every 2 to 3 years. In the past 3 years, other arboviruses have reached the Americas with Chikungunya virus in 2013 and Zika virus in 2015, causing major epidemics including in Guadeloupe. The only known vector of these diseases in Guadeloupe is the mosquito Aedes aegypti. As there is no vaccine nor specific treatment against these infections, prevention against these diseases is achieved through the monitoring and control of mosquito populations. Monitoring methods are based mostly on larval indices, with sometimes controversial results. In addition, vector control methods are based since a very long time on the massive use of chemical insecticides, causing mosquito resistance to these products. This work has therefore focused on two main areas to improve the prevention and control of these arboviruses: i) the search of a new vector population monitoring tool, based on the physiology of adult females and ii) the assessment of the resistance levels and mechanisms regarding three chemical insecticides, Temephos, Malathion (used in the past) and Deltamethrin (currently used). A vector population monitoring model based on females life expectancy as a function of parity rates and according to temperatures has being developed, and tracks on the entomological situations most at risk have emerged. Insecticide resistance tests performed on mosquito larvae have generally found strong Temephos resistance levels and low resistance to Malathion. Adulticide tests showed a moderate resistance of females to Deltamethrin. Molecular investigations have shown very high allelic frequencies for kdr mutations V1016I and F1534C, known to be associated with pyrethroid resistance. Moreover, the evaluation of constitutive expression levels of some detoxification genes revealed significant overexpression in tested Aedes aegypti populations compared to the susceptible Bora-Bora strain, for the carboxy-choline-esterase CCEAE3A, four cytochrome P450 mono-oxygenases (014614, CYP6M11, CYP6BB2 and CYP9J23) and the glutathione-S-transferase GSTE2
Kassebaum, B. J. "Susceptibility of the black Portuguese millipede, "Ommatoiulus moreletti" Lucas (Diplopoda : iulidae) to insecticides." Title page, contents and summary only, 1985. http://web4.library.adelaide.edu.au/theses/09A/09ak19.pdf.
Full textZhai, Jing. "Application of insecticides to control the German cockroach, Blattella germania (L.)." Thesis, This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-06102009-063046/.
Full textMerelli, Bérangère. "Proinsecticides chiraux d'acides carboxyliques et de β-ethanolamines : effet de la chiralité sur la métabolisation et les activités biologiques chez l'insecte." Versailles-St Quentin en Yvelines, 2004. http://www.theses.fr/2004VERS0005.
Full textThe nitrogen heterocylces D2-thiazoline and N-acylaziridine were studied as potential proinsecticides masking the active principles : fluorinated or not carboxylic acids. The synthesis of D2-thiazolines, either as racemates or as pure enantiomers, were performed by thionation/cyclisation using Lawesson reagent. The synthesis of N-acylaziridines were performed by condensation of carboxylic acid with amine obtained as racemate and as pure enantiomer using oxiranes. We developped analytical chiral methods of NMR and HPLC to verify optical purity of different substrates. Then, these methods were applied to extracts of incubated insect tissues by N-acylaziridines racemates after a partial unmasking for the determination of the enantiomeric composition. The biological properties of these potentials proinsecticides were evaluated by several testings performed with various pests : Drosophila melanogaster, Aphis gossypii, Myzus persicae, Tetranychus urticae. The metabolization of the most interesting molecules was studied in insect biological media (tissues of locusts or caterpillars or with a-chymotrypsin), without any pretreatment, using analytical methods such as 19F[1H]NMR or HPLC allowing the direct injection on particular packing material such as wide pore particles or monolithic column. In these biological media, N-acylaziridines beleave effectively as proinsecticides of the carboxylic acid, since the unmasking is very efficient. D2-thiazolines are more stable since it's necessary to use concentred biological media for unmasking a little of active principle
Edney, Dean. "Synthetic studies towards guinesine and other naturally occurring sulphur heterocycles." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284032.
Full textHelliwell, Raymond Michael. "The physiology of locust hindgut muscle with reference to the possible effects of azadirachtin." Thesis, University of Aberdeen, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.304951.
Full textTalukder, Farid A. "Isolation and characterization of active secondary pithraj (Aphanamixis polystachya) compounds in controlling stored-product insect-pests." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295906.
Full textKoni, Pandelakis. "Molecular characterization of Bacillus thuringiensis cytolytic delta-endotoxins." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309051.
Full textLovell, Helen. "Azadirachtin : biological properties and synthetic studies." Thesis, University of Cambridge, 1994. https://www.repository.cam.ac.uk/handle/1810/272783.
Full text