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Dissertations / Theses on the topic 'Plants insecticides'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Samarasekera, Jayaneththi. "Insecticidal natural products from Sri Lankan plants." Thesis, Open University, 1997. http://oro.open.ac.uk/19785/.

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This thesis describes investigations of the insecticidal compounds of three Sri Lankan plants, <i>Pleurostylia opposita</i> (Wall) Alston (Celastraceae), <i>Aegle marmelos</i> Correa (Rutaceae) and <i>Excoecaria agallocha</i> Linn. (Euphorbiaceae). After establishing the insecticidal activity of the extracts of three plants, separation of compounds was achieved by bio-assay directed chromatography, and the compounds were characterised by NMR especially 2D experiments, mass, UV and IR spectroscopy. Three new macrocyclic sesquiterpene polyol ester alkaloids 1, 2 and 3 containing a novel 6,7 ring

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2

Umeda, 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.

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No masked chafer larvae were observed for treatments of imidacloprid, imidacloprid plus bifenthrin, clothianidin, and the two higher rates of DPX-E2Y45. The inconsistent and low populations of masked chafer larvae and billbugs in the turfgrass did not provide for conclusive results. Clothianidin and the two higher rates of DPX-E2Y45 had no billbug larvae. An early rating date showed that more billbug adults were in turf treated with imidacloprid and DPX-E2Y45. Later rating dates showed a decline in adults for all treatments.

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3

Rethwisch, Michael D., Jessica Grudovich, Steven Bennett, and Mark Reay. "Evaluation of Various Insecticides for Late Winter/Early Spring Insect Control, 2004." College of Agriculture, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/203838.

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Nine insecticides were applied on March 10, 2004, to alfalfa that had been water stressed prior to irrigation on March 6. These actions were thought to have resulted in treatments means with less distinct differences than usually noted for these treatments at 7-14 days post treatment. All pyrethroid treatments as well as Lorsban® and Steward® treatments resulted in significant reductions of alfalfa weevil larvae at four days post treatment. The Trilogy® treatment did not result in acceptable control of this pest. Significant increases in adult alfalfa weevils were noted at 10-14 days post trea

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4

Fiscian, Prempeh. "Influence of food plants on growth and development and susceptibility to insecticides of Spodoptera littoralis (Boisduval)." Thesis, University of Newcastle Upon Tyne, 1995. http://hdl.handle.net/10443/926.

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A series of experiments was conducted to evaluate the responses of S. littoralis (Boisd) to seven plants species. Probable factors responsible for the preference for some of the food plants were determined. In multiple-choice preference tests, both 1st and 4th instar larvae preferred dicotyledonous to monocotyledonous plants. First instar larvae rejected millet. In two-choice tests using maize, millet and sorghum, the larvae always preferred maize. Studies on growth and development of the larvae on the food plants were carried out. The larvae failed to develop to the pupal stage on millet. Gro

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5

Jennings, David. "The Conservation and Ecology of Carnivorous Plants." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/3169.

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As discussed in Chapter 1, although our understanding of the ecology and evolution of carnivorous plants has greatly improved in recent years, many fundamental questions remain unanswered. Unfortunately, at the present time, many carnivorous plants are increasingly threatened by anthropogenic activities. Indeed, over half of the carnivorous plant species assessed by the International Union for the Conservation of Nature (IUCN) are listed as `threatened', but the threats to carnivorous plants have not previously been quantified. In Chapter 2, I quantified the conservation threats to carnivor

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6

Rethwisch, Michael D., Mark Reay, Lois Berger, et al. "Comparisons of Insecticides on Fall Alfalfa Insect Populations, and Resultant Hay Yields and Quality." College of Agriculture, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/203869.

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Three insecticide active ingredients (cyfluthrin, indoxacarb, and zetacypermethrin) were evaluated for their efficacy on several insects found in fall alfalfa in the low desert. Both liquid and wettable formulations were included for both cyfluthrin and zetacypermethrin, and four rates of indoxacarb were applied. Insect pressures were fairly low throughout the study. Pyrethroid chemistries (cyfluthrin, zetacypermethrin) provided excellent control of threecornered alfalfa hoppers for seven days after application while cyfluthrin applications resulted in lowest numbers of pale striped flea beetl

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7

Rethwisch, Michael D., and John E. Nelson. "Effects of Various Insecticides on Early Fall Alfalfa Insects and Related Crop Yield and Quality." College of Agriculture, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/205368.

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Six insecticides and/or rates were applied for efficacy data collection for Empoasca sp. leafhoppers and threecornered alfalfa hoppers. Data were also collected on a number of other insects present. Samples were collected one, four, seven and ten days post treatment. Yield and quality data were obtained after baling. Data indicated that several insecticides effectively controlled threecornered alfalfa hopper, as well as provided control of Empoasca leafhoppers. The Baythroid 2 treatment increased yields by 0.3 tons/acre (35%) compared with the check, but yields across the various treatments di

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8

Truong, Hung Phuc. "Fate of Cry Toxins from Bacillus thuringiensis in soil." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS210.

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Les propriétés insecticides du Bacillus thuringiensis, découvert par ShigentaneIshiwatari, ont été utilisées pendant des décennies comme biopesticides et cette utilisation a augmenté rapidement en raison de préoccupations au sujet des effets environnementaux négatifs des pesticides chimiques. Actuellement, la toxine Bt dans la forme de biopesticides et des plantes transgéniques Bt peut compléter ou remplacer les pesticides chimiques. Il y a peu d’indication que la toxine Bt a un effet nocif pour l'environnement ou la santé humaine. Néanmoins, il ya des préoccupations que les cultures transgéni

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9

Smith, Ethan A. "Is everything connected? following the predators, pests, and plants within a no-till, western Montana agroecosystem /." CONNECT TO THIS TITLE ONLINE, 2006. http://etd.lib.umt.edu/theses/available/etd-12212006-142245/.

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10

Rethwisch, Michael D. "Comparisions of Differing Rates of Baythroid 2® and WarriorT® Insecticides for Insect Control in Fall Alfalfa." College of Agriculture, University of Arizona (Tucson, AZ), 2000. http://hdl.handle.net/10150/204091.

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Various rates of two insecticides were tested for efficacy on threecornered alfalfa hopper and Empoasca sp. leafhoppers. Data were also collected for efficacy of insecticides on beneficial insects present. Hay quality samples were taken after baling. Both insecticides provided excellent control of threecornered alfalfa hopper, and Baythroid also controlled Empoasca sp.leafhoppers. Quality of hay was increased where threecornered alfalfa hoppers were controlled, although this control was for only eight days prior to cutting. A decrease in digestible hay protein was noted with increasing numbers

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11

Jesus, Marcella Guerreiro de 1989. "Análises físico-químicas das caldas e espectro de gotas com diferentes formulações de inseticidas em simulação de aplicação aérea /." Botucatu, 2019. http://hdl.handle.net/11449/181404.

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Orientador: Ulisses Rocha Antuniassi<br>Banca: João Paulo Arantes Rodrigues da Cunha<br>Banca: Fabio Henrique Rojo Baio<br>Banca: Carlos Gilberto Raetano<br>Banca: Caio Antonio Carbonari<br>Resumo: A pulverização aérea é uma técnica de aplicação com grande demanda de uso devido a seu elevado rendimento operacional e eficiência. Pesquisas voltadas para essa área são cada vez mais necessárias, para um melhor entendimento do comportamento de cada técnica de aplicação de defensivos nas condições operacionais de aplicação aérea. O objetivo deste trabalho foi avaliar a interferência de adjuvantes e

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12

Mata, Rosely Ferreira Freitas da. "Efeito de extratos aquosos de Cabralea canjerana subsp. polytricha (Adr. Juss.) Penn. (Meliaceae) no controle biológico de Brevycorine brassicae (L.) (Hemiptera: Aphididae) e Ascia monuste orseis (Godart) (Lepidoptera: Pieridae)." Universidade Federal de Uberlândia, 2007. https://repositorio.ufu.br/handle/123456789/13436.

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This work was performed to test the effect of aqueous extract of Cabralea canjerana subsp. polytricha (Meliaceae) in the control of Brevycorine brassicae (Hemiptera: Aphididae) and Ascia monuste orseis (Lepidoptera: Pieridae). Extract of leaves, fruits and seeds of 3, 5 and 10% were obtained through infusion of dry and triturated material in distilled water filtered after 24 hours. The effect of the extracts was tested in the survival of B. brassicae and the viability, larval and pupal weight and repellent/antifeedant activity of A. monuste orseis. Extract of 3 and 5% did not demonstrated inse

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13

Pessini, Milena Martins de Oliveira. "Resíduos de acetamiprid e thiamethoxam em tomate estaqueado (Lycopersicon esculentum Mill.), em diferentes modalidades de aplicação." Universidade de São Paulo, 2003. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-15072003-141133/.

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No final dos anos 80, intensificaram-se as preocupações com os danos provocados à saúde do trabalhador rural e ao meio ambiente devido o uso indiscriminado de agrotóxicos. A descoberta de novos grupos de inseticidas, menos tóxicos e agressivos ao meio ambiente, vieram amenizar o problema. Entretanto, seus efeitos residuais ainda são pouco estudados, o que motivou esta pesquisa. Este trabalho visou avaliar o efeito dos inseticidas acetamiprid e thiamethoxam, pertencentes ao grupo dos neonicotinóides em diferentes modalidades de aplicação, com a finalidade de reduzir o número de pulveriza

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14

Santos, Marcus Nascimento. "Avalia??es Mensais de Estacas de Pinus como Isca-Armadilha para Cupins Subterr?neos em ?reas de Composi??es Flor?sticas Distintas no Jardim Bot?nico do Rio de Janeiro e Avalia??o de Extratos Bot?nicos como Cupinicida." Universidade Federal Rural do Rio de Janeiro, 2008. https://tede.ufrrj.br/jspui/handle/tede/498.

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Made available in DSpace on 2016-04-28T14:57:34Z (GMT). No. of bitstreams: 1 2008 - Marcus Nascimento Santos.pdf: 462545 bytes, checksum: 46bb8f8940f38566f10544863c83cbb2 (MD5) Previous issue date: 2008-07-25<br>This work was made in the Research Institute Botanic Garden of Rio de Janeiro (JBRJ) where two experiments were carried out in two steps. The first step had the following objectives: to study the attack behavior of subterranean termites over stakes of pinus trap in three areas of different compositions floristic seed source in the JBRJ, appointed by cerrado-JB, lawn - JB and forest

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Mach, Bernadette Maria. "BEE CONSERVATION IN URBAN LANDSCAPES: ASSESSING BEE ASSEMBLAGES, BEE–ATTRACTIVENESS, AND NUTRITRITIONAL VALUE OF WOODY LANDSCAPE PLANTS AND MITIGATING POTENTIAL BEE HAZARD FROM NEONICOTINOID INSECTICIDES." UKnowledge, 2018. https://uknowledge.uky.edu/entomology_etds/46.

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Public awareness of declining pollinator populations has increased interest in creating “bee–friendly” urban landscapes. I quantified bee visitation and assemblages of 72 species of flowering woody plants common in urban landscapes. I found strong plant species effects and variation in seasonal activity of particular bee taxa but no overall differences in bee visitation or genus diversity between native versus nonnative species or trees versus shrubs. Analysis of pollen from a subset of these plants revealed small but statistically significant differences in total and essential amino acids bet

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16

Matos, 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.

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Doutoramento em Engenharia Agronómica - Instituto Superior de Agronomia<br>The 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.

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17

Dorla, Emmanuelle. "Étude phytochimique et propriétés bioactives de Peperomia borbonensis (Miq.) Piperaceae." Thesis, La Réunion, 2016. http://www.theses.fr/2016LARE0027.

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Les maladies impliquant des micro-organismes représentent un problème majeur de santé publique en raison du fort taux de mortalité provoqué par l'accroissement et l'émergence de souches résistantes. De même, les régions tropicales du Monde et La Réunion doivent faire face depuis plusieurs années à la pression accrue d'arthropodes ravageurs de cultures et vecteurs de maladies. Pour lutter contre ces arthropodes, les pesticides synthétiques aux conséquences désastreuses sur l'Homme et l'environnement sont principalement utilisés. Depuis quelques années, on observe un phénomène grandissant de rés

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18

Thomazoni, Danielle. "Efeito da resistência de Spodoptera frugiperda (J.E.Smith, 1797) (Lepidoptera: Noctuidae) a lambda-cyhalothrin na interação com o milho geneticamente modificado (MON810) e na resposta imunológica ao parasitismo por Campoletis af." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-04072012-111034/.

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Os custos adaptativos associados à resistência de insetos a inseticidas podem ser explorados mediante a integração com outras estratégias de controle de pragas em programas de Manejo Integrado de Pragas (MIP). No presente estudo, objetivou-se verificar custos adaptativos associados à resistência de Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae) ao inseticida piretroide lambda-cyhalothrin e suas implicações na utilização do hospedeiro pelo parasitoide larval Campoletis aff. flavicincta (Hymenoptera: Ichneumonidae) e as interações com milho geneticamente modificado (MON810) que exp

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Marcomini, Angelina Maria. "Bioatividade e efeito residual de nanoformulações de nim sobre Spodoptera frugiperda (J.E. Smith)." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-09112009-141755/.

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Na tentativa de reduzir a biodegradação dos compostos ativos do nim e melhorar seu efeito residual, extratos de nim foram nanoformulados com diferentes tipos de nanoparticulas e de polímeros. Estas nanoformulações foram testadas sobre Spodoptera frugiperda (J. E. Smith) e sua eficiência comparada a um produto comercial. Os polímeros poli--caprolactona (PCL), poli-- hidroxibutirato (PHB) e polimetilmetacrilato(PMMA), foram utilizados nas quantidades 0,25, 0,50 e 0,75g, e em dois tipos de nanopartículas (cápsulas e esferas). Foram utilizados Tween®80 e polivinil álcool (PVA) como agentes tensoat

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Ribeiro, Leandro do Prado. "Biosprospecção de extratos vegetais e sua interação com protetores de grãos no controle de Sitophilus zeamais Mots. (Coleoptera: Curculionidae)." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-10022011-163406/.

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Objetivou-se, no presente estudo, avaliar a ação de extratos orgânicos e frações de plantas com atividade inseticida, bem como, a associação de extratos orgânicos brutos com terra de diatomácea no controle de Sitophilus zeamais Mots. (Coleoptera: Curculionidade), em milho armazenado. Os extratos foram obtidos por meio de maceração em solventes orgânicos (hexano, diclorometano e etanol), em ordem crescente de polaridade, das seguintes estruturas e espécies vegetais: ramos, folhas e sementes de Annona montana e de A. mucosa; ramos de Aristolochia cf. paulistana e folhas e ramos de Casearia sylve

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Carvalho, Stella Pacheco Lombardi de. "Resíduos de deltametrina e de carbaril em dois sistemas de condução da cultura de tomate estaqueado (Lycopersicon esculentum Mill) e sua eficiência no controle da broca-pequena-do-fruto Neoleucinodes elegantalis (Guenée, 1854) (Lepidoptera: Crambidae)." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-22092004-143434/.

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O objetivo deste estudo foi avaliar os inseticidas deltametrina e carbaril, de modo a abranger seus resíduos em dois sistemas de condução da cultura de tomate estaqueado (linha dupla, plantio comercial e linha simples, plantio experimental) e sua eficiência no controle da broca-pequena-do-fruto, a determinação dos resíduos nos substratos: frutos (visando à proteção à saúde pública), folhas e solo (como uma possível fonte de contaminação ambiental), a comparação dos níveis de resíduos encontrados nesses diferentes sistemas de condução, o controle obtido com os dois inseticidas e sistemas de con

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22

Stenger, Luma Dalmolin. "Toxicidade dos óleos essenciais sobre Thaumastocoris peregrinus, Cleruchoides noackae e na indução de resistência em Eucalyptus benthamii." Universidade Tecnológica Federal do Paraná, 2017. http://repositorio.utfpr.edu.br/jspui/handle/1/2516.

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CNPq<br>As plantações de eucalipto no Brasil vêm sofrendo ataque de insetos exóticos, causando perdas significativas nesta cultura. Thaumastocoris peregrinus alimenta-se da seiva das folhas do eucalipto, o que promove redução na taxa fotossintética, desfolha e, em alguns casos, a morte da planta. Contudo, métodos de controle alternativo estão sendo estudados para reduzir e/ou eliminar os problemas associado a esse inseto e ao uso de produtos fitossanitários sintéticos. Deste modo, o presente trabalho objetivou avaliar a toxicidade dos óleos essenciais de Melaleuca alternifolia, Casearia sylves

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23

Bosch, Serra Dolors. "Diversidad y extensión de los mecanismos de resistencia a insecticidas en poblaciones españolas de carpocapsa (Cydia pomonella (L.) Lepidoptera Tortricidae) y estudio de sus posibilidades de manejo." Doctoral thesis, Universitat de Lleida, 2017. http://hdl.handle.net/10803/664271.

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La carpocapsa, Cydia pomonella (L.) (Lepidoptera: Tortricidae), és una de les plagues més importants del cultiu dels fruiters de pinyol, principalment de la pomera. A la zona fructícola de Lleida, a l’igual que a la majoria de les zones productives del món, s’han detectat problemes de resistència a insecticides piretroïds, organofosforats, benzoilurees, fenoxycarb i diacilhidracines. El principal mecanisme de resistència detectat ha estat l’acció dels enzims detoxificadors multifunció-oxidases (MFO) i, de manera menys important, glutathion transferases (GST) i esterases (EST). A la present tes

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24

Guzzo, Élio César. "Seleção de genótipos de feijoeiro Phaseolus vulgaris (L.) (Leguminosae) resistentes aos carunchos Acanthoscelides obtectus (Boh.) e Zabrotes subfasciatus (Say) (Coleoptera: Bruchidae) e o seu uso associado com inseticidas botânicos." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-16072008-131053/.

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Este estudo foi realizado com o objetivo de identificar genótipos de feijão Phaseolus vulgaris resistentes aos carunchos Acanthoscelides obtectus e Zabrotes subfasciatus, bem como avaliar o efeito associado desses genótipos resistentes com inseticidas de origem vegetal. Para tanto, foram utilizados acessos de P. vulgaris do Banco de Germoplasma do Instituto Agronômico de Campinas e inseticidas comerciais de origem botânica. No screening inicial, amostras dos genótipos foram infestadas com cada uma das espécies de bruquídeos separadamente, avaliando-se o número de insetos emergidos aos 50 dias

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Rethwisch, Michael D. "Spring Alfalfa Insecticide Trial." College of Agriculture, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/201373.

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Lizana, Rojas Diego. "Elaboración y evaluación de extractos del fruto de Melia azedarach L. como insecticida natural." Tesis, Universidad de Chile, 2005. http://www.repositorio.uchile.cl/handle/2250/105065.

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Castro, Júnior Laurindo Camilo de. "Perspectivas de uso e potencial de plantas no controle de culicíneos de importância em saúde pública." Universidade Federal de Goiás, 2008. http://repositorio.bc.ufg.br/tede/handle/tede/3570.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2014-11-07T11:40:53Z No. of bitstreams: 2 Dissertação - Laurindo Camilo de Castro Júnior - 2008.pdf: 744212 bytes, checksum: 54bc98384ca53eb5c272a0d02e1d0e7f (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a7714714b86306 (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2014-11-07T12:13:47Z (GMT) No. of bitstreams: 2 Dissertação - Laurindo Camilo de Castro Júnior - 2008.pdf: 744212 bytes, checksum: 54bc98384ca53eb5c272a0d02e1d0e7f (MD5) license_rdf: 23148 bytes, checksum: 9da0b6dfac957114c6a771

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Barstow, Ben. "Alfalfa Insecticide Trial, Coolidge." College of Agriculture, University of Arizona (Tucson, AZ), 1985. http://hdl.handle.net/10150/200497.

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Eyraud, Vanessa. "Etude d’un insecticide naturel nommé PA1b : Mécanisme d’action et expression hétérologue." Thesis, Lyon, INSA, 2014. http://www.theses.fr/2014ISAL0020/document.

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Dans un contexte où l’utilisation de substance chimique en agriculture est de plus en plus décriée, il est nécessaire de trouver de nouveaux moyens de protections des cultures, tout en maintenant une agriculture économiquement performante. Ainsi, un peptide extrait de graines de pois nommée PA1b (Pea Albumin 1 sous-unité b), présentant une forte activité insecticide a été découvert au laboratoire. PA1b provoque chez l’insecte modèle du laboratoire, le charançon des céréales Sitophilus sp., 100% de mortalité. L’action de PA1b passe par la liaison à un récepteur présent chez les charançons sensi

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Lima, Rafaely Nascimento. "Caracterização química dos óleos essenciais e extratos supercríticos de três espécies de Piper de Sergipe." Pós-Graduação em Química, 2014. https://ri.ufs.br/handle/riufs/6097.

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To contribute to the knowledge of the chemical species P. klotzschianum, P. hispidum and P. arboreum, analyzes of volatile obtained by hydrodistillation-(HD), extracts obtained by supercritical fluid extraction-(SFE) and identification of isolated compounds were performed using techniques such as GC/MS/FID, NMR (1D, 2D) and IV. Sesquiterpenes present in P. klotzschianum, P. hispidum and P. arboreum as the (E)-caryophyllene, bicyclogermacrene and germacrene D observed only in P.hispidum and P. klotzschianum were the main substances responsible for the high values obtained sesquiterpenes identif

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Richards, David Philip. "Investigating ladybird alkaloids as potential leads for novel insecticides." Thesis, University of Nottingham, 2016. http://eprints.nottingham.ac.uk/33024/.

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Ladybird beetles produce a range of alkaloid compounds which are found a high concentration in the haemolymph and released in response to perceived threat. These alkaloids are thought to function as agents of chemical defence and a small number have been shown to antagonise the nicotinic acetylcholine receptor. As intraguild predators, the chemical defence may be under selective pressure from other predatory insects, the alkaloids may therefore have evolved to target insects predominantly. To discover if other ladybird alkaloids show activity at nAChRs and investigate mode of action, alkaloids

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Almeida, Viviane Tavares de. "Bioatividade de extrato etanólico de Euphorbia pulcherrima sobre Spodoptera frugiperda (Lepidoptera: Noctuidae)." Universidade do Oeste Paulista, 2016. http://bdtd.unoeste.br:8080/jspui/handle/jspui/1085.

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Submitted by Michele Mologni (mologni@unoeste.br) on 2018-07-27T14:02:13Z No. of bitstreams: 1 Viviane Tavares de Almeida.pdf: 648777 bytes, checksum: 415a188441b2acf7c0cb46fd1aeeac2b (MD5)<br>Made available in DSpace on 2018-07-27T14:02:13Z (GMT). No. of bitstreams: 1 Viviane Tavares de Almeida.pdf: 648777 bytes, checksum: 415a188441b2acf7c0cb46fd1aeeac2b (MD5) Previous issue date: 2016-03-30<br>The fall armyworm (Spodoptera frugiperda) is a polyphagous species which attacks many economically important crops in several countries. This insect is an important pest of corn, and currently the m

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Navarro, Patricia D. "Entomopathogenic Nematodes: Their Interactions with Plant Pathogens and Insecticides in the Soil." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/265815.

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Entomopathogenic nematodes (EPNs) in the families Heterorhabditidae and Steinernematidae, and their bacterial symbionts, have been studied intensively because of their role as natural mortality factor for soil-dwelling arthropods, and their potential as biological control agents for belowground insect pests. Moreover, EPN are recognized as key players in regulating soil food webs and triggering trophic cascades. However, most studies of interactions with EPN have been conducted under laboratory setting and simplified conditions, without consider the dynamic of the EPN and their interactions wi

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Baeza, Sandoval Brian Alexander. "Evaluación de seis insecticidas en el control de la mosquita blanca del fresno, Siphoninus phillyreae (Haliday) (Hemiptera: Aleyrodidae) en granados en la Región Metropolitana." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/150795.

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Memoria para optar al título profesional de Ingeniero Agrónomo<br>En un huerto comercial de granados cv. Wonderful (plantados en 2010 a 3 x 5 m), con infestación de S. phillyreae, se evaluó el efecto de seis insecticidas: los detergentes TS-2035® y Tecsa Fruta® y el aceite mineral Winspray®, todos al 1 % v/v; el entomopatógeno Mycotrol® (Beauveria bassiana (V.)) y dos insecticidas convencionales, Nuprid® (imidacloprid) y Applaud® (buprofezin), en dosis recomendadas. Los tratamientos se dispusieron en un diseño completamente aleatorizado con 4 repeticiones, además de un control sin tratar. Se h

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Don, Pedro K. N. "Insecticidal activity of plant oils against stored product pests." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/38289.

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Carvalho, Sheila Salles de. "Avaliação do efeito sistêmico de nanoformulações à base de derivados de nim (Azadirachta indica A. Juss) sobre Bemisia tabaci (Genn.) biótipo B (Hemiptera: Aleyrodidae) em tomateiro." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-23102012-162037/.

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A nanotecnologia é cada vez mais empregada em métodos alternativos de controle de pragas. Em virtude disso, nanoformulações foram preparadas com nanocápsulas (NC) utilizando os polímeros poli-metacrilato de metila (PMMA), poli-?-caprolactona (PCL) e poli- ?-hidroxibutirato (PHB) como agentes encapsulantes de duas moléculas inseticidas (azadiractina e 3-tigloilazadiractol), e tendo como matriz oleosa o óleo de nim ou o óleo comercial Azamax®, ambos com teor de azadiractina enriquecido. O objetivo foi avaliar a eficácia de 19 nanoformulações no controle de ninfas de Bemisia tabaci biótipo B, imp

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Victor, Christine. "Recherche de nouvelles substances végétales insecticides. Etude de pinus pinaster ait." Aix-Marseille 3, 1998. http://www.theses.fr/1998AIX30057.

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Ce memoire est consacre a la recherche et l'identification de nouvelles substances insecticides d'origine vegetale, notre etude portant sur le feuillage de quinze especes mediterraneennes. Nous avons mis a l'essai huit gymnospermes, un chlamydosperme et six angiospermes. Des extractions successives par lixiviation de feuilles seches par quatre solvants permettent une premiere fragmentation des composants organiques. Ils sont testes sur quatre predateurs de cultures : aphis craccivora, phaedon cochleariae, spodoptera littoralis (insectes) et tetranychus urticae (acarien). Seules trois especes v

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Triguéros, Véronique. "Les Lectines fongiques : purification et détermination de leurs activités insecticides, clonage et expression de la lectine toxique de Xerocomus Chrysenteron." Toulouse 3, 2000. http://www.theses.fr/2000TOU30215.

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Kwapong, Peter Kofi. "Studies on the experience of host brassica crops by the aphids (Brevicoryne brassicae and Myzus persicae) and the diamondback moth (Plutella xylostella) and their parasitoids Diaretiella rapae and Daidegma semiclausum on their reproductive performance." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245011.

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Powell, Kevin Steven. "Antimetabolic effects of plant proteins on homopteran insect pests." Thesis, Durham University, 1993. http://etheses.dur.ac.uk/5757/.

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Homopteran insect pests can cause severe economical damage to crop plants by both direct physical means and as vectors of plant viral diseases. They are notoriously difficult insects to control by conventional methods, primarily due to their ability to evolve resistance-breaking biotypes within a relatively short time period. The production of genetically modified crop plants, expressing insecticidal genes, offers a novel method of control for a wide range of insect species. Once suitable gene products, such as plant- derived proteins, have been identified as having insecticidal effect against

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Robertson, Veronica. "The assessment of potential insecticidal plants for local use in rural highland Ecuador." Thesis, University of British Columbia, 2010. http://hdl.handle.net/2429/20124.

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In rural highland Ecuador, the potato provides the basic source of calories and nutrients to the local population. The indiscriminate use of synthetic pesticides applied in its production is taking a heavy toll on those people it is meant to sustain. Pesticide poisoning is currently the second-leading cause of death in many of the intensely agricultural provinces of the country, while sub-lethal effects deteriorate the quality of life for up to two-thirds of those exposed to the chemicals. Tecia solanivora (Povolny), the Guatemalan potato moth, is presently the greatest threat to potato prod

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Bastos, Cristina Schetino. "Plant physiological response to insect injury and insecticide impact over soil arthropods." Universidade Federal de Viçosa, 2002. http://www.locus.ufv.br/handle/123456789/10215.

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Submitted by Reginaldo Soares de Freitas (reginaldo.freitas@ufv.br) on 2017-05-03T19:00:03Z No. of bitstreams: 1 texto completo.pdf: 143842 bytes, checksum: fae2a0f2c5bfa6d6037c8c47f2dad1f9 (MD5)<br>Made available in DSpace on 2017-05-03T19:00:03Z (GMT). No. of bitstreams: 1 texto completo.pdf: 143842 bytes, checksum: fae2a0f2c5bfa6d6037c8c47f2dad1f9 (MD5) Previous issue date: 2002-10-07<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A crescente necessidade por segurança ambiental quando enfrentando o problema advindo do controle de pragas tem levado a melhoria nas téc

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Ruckert, Alice. "Interactions Between Plant Water-Stress and Neonicotinoid Insecticides on Spider Mite Infestations in Corn." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/6428.

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Spider mites (Acari: Tetranychidae) are an important agricultural pest of many crops and landscape plants. They can reproduce rapidly and quickly develop resistance to many pesticides, making them difficult to manage. Plant water-stress and high temperatures promote spider mite infestations, while spider mite outbreaks can also result from neonicotinoid insecticide applications. Drought is predicted to increase in the Intermountain West due to increases in temperature and reduced frequency of precipitation events in the region, and neonicotinoids are currently one of the most widely used class

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Dierks, Cole. "Evaluating the Efficacy of Foliar Insecticide and Soybean Seed Treatment in South Dakota." Thesis, South Dakota State University, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13864072.

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<p> The utilization of cover crops and no-till practices are important for the conservation of both soil and moisture in South Dakota. However, it is unknown if these practices impact the efficacy of insecticide seed treatments. In soybean, insecticide seed treatments are used prophylactically to prevent potential crop losses from early season insect pests. The prophylactic use of any management strategy increases the likelihood for selection pressure and also represents unnecessary input costs. The purpose of the research conducted for Chapter 2 was to determine the impact that tillage system

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Iannacone, Oliver José. "Efecto insecticida de cuatro extractos botánicos y del cartap sobre la polilla de la papa Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) y en cuatro controladores biológicos, en el Perú." Doctoral thesis, Universidad Nacional Mayor de San Marcos, 2003. https://hdl.handle.net/20.500.12672/3317.

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Phthorimasa(Zeller)(Lepidoptera: Gelechiidae) es una laga clave en el cultivo de papa en el Perú , El depredadorChrysoperla externa hagen y las tres microavispasparasitoides Trichogrammma pintoi Vosgelé, Copidosoma koehleri blanchard y Dolichogenidia gelechiidivoris(Marsh) son controladores biológicos promisorios de plagas agrícolas clave en el Perú, pais donde no se ha investigado los efectos de la integración de métodos biológicos y productos biocidas al manejo integrado de plagas.<br>Phthorimaea operculella (Zeller) (Lepidoptera: Gelechiidae) is a key pest in potato crops in Peru. Chrysoper

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Lale, N. E. S. "Insecticidal activity of plant essential oils on Callosobruchus maculatus (F.) : (Coleoptera:Bruchidae)." Thesis, University of Newcastle Upon Tyne, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379315.

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Boulogne, Isabelle. "Evaluation du potentiel insecticide et antifongique sur Acromyrmex octospinosus (Reich) d'une sélection de plantes à usages etnopharmacologiques TRAMIL." Thesis, Antilles-Guyane, 2011. http://www.theses.fr/2011AGUY0469/document.

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Les attines sont des fourmis champignonnistes dans la zone allant des Etats-Unis à l'Argentine en passant par la Caraïbe. Les dégâts causés par ces ravageurs sont considérables et estimés à plusieurs millions de dollars par an. Elles sont de ce fait considérées comme l'un des premiers fléaux de l'agriculture de la zone (Cameron & Riggs, 1985 ; Fowler et al., 1986). En Guadeloupe, la "fourmi manioc" (Acromyrmexoctospinosus Reich) cause de nombreux dommages, aussi bien pour l'agriculture que dans les milieux naturels. Les dégâts occasionnés par ces fourmis ont nécessité l'utilisation de pest

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Lambert, Nadine. "Etude comparative de la biosynthèse de roténoi͏̈des par des suspensions cellulaires hétérotrophes et photomixotrophes de Tephrosia vogelii Hook f : essais d'optimisation de la production." Montpellier 2, 1989. http://www.theses.fr/1989MON20082.

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Une souche heterotrophe et une souche photomixotrophe de tephrosia vogelii hook f. , papilionaceae tropicale accumulant dans ses feuilles des rotenoides (insecticides biodegradables) ont ete etudiees dans le but de cerner l'impact de la lumiere sur la production de metabolites secondaires in vitro. Deux systemes de culture ont ete employes: culture en erlenmeyer et culture en bioreacteur. Les cinetiques de production de biomasse, d'accumulation et d'excretion de rotenoides, l'evolution de la teneur en chlorophylles et de l'activite respiratoire et photosynthetique ainsi que les modifications i

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Quispe, Tippe Luis Gerardo. "Estudio de pre-factibilidad para la producción y exportación del barbasco en polvo como insumo de insecticidas y pesticidas naturales al mercado de los Estados Unidos." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2016. http://tesis.pucp.edu.pe/repositorio/handle/123456789/7758.

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A través de los cinco capítulos del presente estudio de pre-factibilidad, se demuestra la factibilidad técnica, legal, económica y financiera de la implementación de una fábrica de molido de raíz de barbasco para su exportación al mercado de los EE.UU. En primer lugar, en el estudio estratégico se analizaron los factores macro y micro ambientales; se definieron la misión, visión y un análisis FODA que delimitó una estrategia genérica de diferenciación, industrializando el producto, promocionando su uso por sus características biodegradables y repotenciándola como alternativa a la hoja de

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Diedrick, Keith A. "Reduced insecticide rates and host plant resistance for managing Potato Leafhopper in Alfalfa." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1413291380.

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