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Dissertations / Theses on the topic 'Insect; Disease'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Cotter, Sheena C. "Trade-offs in insect disease resistance." Thesis, University of Stirling, 2002. http://hdl.handle.net/1893/26688.

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The ability to mount an efficient immune response should be an important life-history trait as parasitism can impact upon an individual's fecundity and survival prospects, and hence its fitness. However, immune function is likely to be costly as resources must be divided between many important traits. Whilst many studies have examined host resistance to particular parasite types, fewer have considered general immune responses. Studies that have considered general immune responses tend to do so in vertebrate models. However, the complexity of the vertebrate immune system makes the examination o

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2

Winskill, Peter. "Evaluation of transgenic insects for use in the control of insect-borne disease." Thesis, Imperial College London, 2014. http://hdl.handle.net/10044/1/45393.

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The burden of many vector-borne diseases remains high and for some, such as dengue fever, continues to rise. It is estimated that up to half of the global population is at risk from dengue. Treatment of dengue fever is currently limited to case management and there are, at present, no licensed vaccines available. As a result, the front-line defence against dengue fever remains vector control. Modern approaches to vector control are attempting to push forward new techniques to target the mosquito vectors of dengue. One such technique is the release of transgenic insects that are genetically ste

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3

Groen, Simon Cornelis. "Manipulation of plant-insect interactions by insect-borne plant viruses." Thesis, University of Cambridge, 2013. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.648187.

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4

Cozens, Russel David. "Insect and disease risk factors in established interior spruce plantations." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24426.

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Forest insects and diseases active in immature interior spruce stands in the central interior of British Columbia and their possible implications in forest management practices have been surveyed. Collection records, spanning the period 1949 to 1982, from the Forest Insect and Disease Survey of the Canadian Forestry Service were reviewed for the Prince George Timber Supply Area and the pest incidence in immature interior spruce stands summarized. Twenty-two plantations, established between 1963 and 1973, were surveyed to determine the relative incidence of the major insect and pathogen pests

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5

Watkins, Craig Allen. "Molecular aspects of punta toro virus." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239272.

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6

Theodorides, Kosmas. "Genetic and systematic studies on Cicadellidae vectors." Thesis, University of East Anglia, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368187.

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7

Nunan, Linda Margaret 1957. "Arid landscape design strategies using ornamental plantings for effective insect and disease control." Thesis, The University of Arizona, 1991. http://hdl.handle.net/10150/558163.

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8

Rabin, Daniel. "Using Computer Imaging to Assess Visual Impacts of Forest Insect and Disease Pests." DigitalCommons@USU, 1989. https://digitalcommons.usu.edu/etd/6446.

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Forest insect and disease pests alter the appearance of trees, thereby impacting visual resources. Because of the complexity of most forest landscapes, the degree of visual impact of pest-infested forest stands is difficult to quantify. This paper describes a method of measuring visual impacts of pest-infested forest stands. Photographs of healthy Ponderosa pine trees were entered into a computer video-image-processing system. Using this system, images of trees were altered to simulate different degrees of infestation by limb rust, a forest pathogen. The altered and unaltered images were shown

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9

Warren, Ann. "Transposable genetic elements in the mosquito Aedes aegypti." Thesis, University of Liverpool, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237672.

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10

Woodroof, Helen I. "Biochemical characterisation of the Parkinson's disease-associated kinase PINK1 : insights from the insect world." Thesis, University of Dundee, 2014. https://discovery.dundee.ac.uk/en/studentTheses/16d2b614-b5ec-4de5-897c-a927ab9660b1.

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Parkinson’s disease (PD) is the second most common neurodegenerative disorder, affecting approximately 1% of the population over the age of 65. Around 5% of these cases can be linked to mutations in known genes, one of which is the PINK1 gene, first linked to PD a decade ago. Since then, over 30 mutations in PINK have been described. The PINK1 gene encodes an unusual serine/threonine protein kinase; uniquely among protein kinases, PINK1 is anchored to the mitochondria and furthermore possesses three unusual insertions of unknown function in the N-lobe of its kinase domain. Recently, two import

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11

Marimo, Pricilla. "Gender Impacts of Molecular-Assisted Breeding: The Case of Insect and Disease Resistant Cassava in Nigeria." Thesis, Virginia Tech, 2009. http://hdl.handle.net/10919/33537.

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Cassava is the main staple crop in Nigeria. Using primary data from four south eastern states in Nigeria, the study assessed the gender impacts of improved cassava varieties. Comparative statistical analysis reveals that total female labor is higher than total male in cassava production, processing and marketing. Women spend more labor days than males for planting, weeding, harvesting, marketing and processing. The total female family labor is higher for adopters of new improved cassava varieties. There is however lower family labor input for both male and female adopters for clearing and plow

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12

Lewis, Katherine JoAnn. "Studies on the spread of Verticicladiella procera by soil-borne and insect-borne propagules." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/91132.

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Studies were undertaken to determine the dispersal mechanisms of Verticicladiella procera Kendrick, the causal agent of Procera Root Disease (PRD). Propagule germinability in artificially infested soil decrease rapidly under natural and controlled conditions. Colonization of seedlings in artificially infested soil was rare and symptoms were not displayed by colonized seedlings. Natural populations of V. procera were closely associated with colonized root tissue. Colonization of field planted seedlings was related to proximity to root collars of diseased trees and insect activity on the see

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13

Wilson, Niki Lynn. "Preserving ecological processes, a decision support document for forest insect and disease management in Jasper National Park." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0020/MQ48233.pdf.

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14

Schmeisser, Glen A. "Location of the insect binding specificity domain of the bacillus thuringiensis subsp. israelensis 128 kDa toxin." Virtual Press, 1994. http://liblink.bsu.edu/uhtbin/catkey/897503.

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The ultimate goal of this research was to perform a domain exchange between a computer identified insect specificity region of the mosquito larvicidal protein Cry IVB and a previously identified domain in a related protein toxin which targets lepidopteran insect larvae. If the insect specificity domain has been correctly identified, an exchange of DNA in this manner transfers the toxicity of one peptide to another by an exchange of the insect specificity domains. New, chimeric peptides may be designed which will target a larger spectrum of insect larvae.In previous research a domain exchange w

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15

Holmstead, Jamilee E. "Looking a Gift Horse in the Mouth: 2014 Farm Bill Insect and Disease Restoration Provision -- True Gift or False Hope?" DigitalCommons@USU, 2015. https://digitalcommons.usu.edu/etd/4502.

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Congress passed a revised Farm Bill in 2014 that amended the Healthy Forest Restoration Act (HFRA) to, hopefully, increase the speed with which natural resource issues could be addressed. Federal land management has often been condemned for being time-consuming and burdensome, chiefly in situations that require rapid response, such as insect disease and fire. The amendment in the 2014 Farm Bill is meant to address this concern. The amendment would allow for the insect and disease restoration projects on U.S.D.A. Forest Service land to fall under the National Environmental Policy Act (NEPA)

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16

DeGomez, Tom, and Gregg Garfin. "Insects, Diseases, and Abiotic Disorders in Southwest Forests and Woodlands (Climate Change and Variability in Southwest Ecosystems Series)." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/146954.

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4 pp.<br>This is part of a series on climate variability and forested ecosystems<br>Recent events in the forests of the Southwest have prompted scientists to consider the role of climate variability in insect and disease cycles. Over 70 million pine trees along with millions of other conifers died in 2002-03. Average temperature increases of 3°C enabled the MPB at those high elevations to achieve univoltine (having one generation per year) reproduction leading to previously unheard of outbreaks in white bark pine at high elevation sites in Idaho.Aspen defoliation in Arizona and New Mexico aver

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17

Modelski, Kimberly A. "Comparison of climatic conditions and mosquito abundances in New Castle County, Delaware." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 3.25 Mb., 229 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1435830.

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18

Robinson, Mary J. "Cloning a mosquitocidal fragment of Bacillus thuringiensis subsp. israelensis and location of the insect binding specificity domain of the 130 kDa toxin gene." Virtual Press, 1991. http://liblink.bsu.edu/uhtbin/catkey/774740.

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Various strains of Bacillus thuringiensis Mt.) produce crystalline endotoxins specific for larvae of different insect classes. Two strains, B.t. subspp. israelensis and kurstaki produce similar 130 kDa toxins encoded by the CryIVB gene (toxic to Diptera) and the CryIA gene (toxic to Lepidoptera), respectively. The N-terminal region of the CryIVB gene was cloned into the Escherichia coli expression vector pKX223-3. A mosquitocidal transformant was obtained as determined by mosquito bioassays. The gene fragment, if stable, can be cloned into cyanobacteria to achieve biological control of mosquit

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19

Mbungu, Nsitu T. "Dispersal propensity of adult Colorado potato beetles (Coleoptera:Chrysomelidae) on potato and its implications on the insect resistance management plan." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=102810.

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A three-year (1998-2000) field and laboratory study conducted in Fredericton, New Brunswick, Canada analyzed and quantified the dispersal of adult Colorado potato beetles within and between conventional and transgenic potato plots established according to the high-dose/refuge strategy. More specifically, the study addressed the following four predictions: (1) Adult Colorado potato beetle abundance or flight activity in transgenic potato fields is positively correlated to the abundance or flight activity in the immediately adjacent refuge field. (2) Colorado potato beetle intraspecific competit

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20

Wallage, Helena Rachelle. "The effects of Plagiorchis elegans (Trematoda : Plagiorchiidae) infection on the carbohydrate metabolism of fourth instar Aedes aegypti (Diptera : Culicidae) larvae." Thesis, McGill University, 2000. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=30763.

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Glucose was present in substantially greater concentrations in whole body extracts of fourth instar Aedes aegypti L. larvae than was trehalose; in contrast, trehalose was more abundant than glucose in haemolymph extracts. Preliminary studies suggested that infection of Ae. aegypti by the entomopathogenic digenean Plagiorchis elegans Rudolphi alters the carbohydrate metabolism of fourth instar larvae. Within 24 hours of cercarial penetration, total body extracts of infected fourth instar larvae exhibited decreased trehalase activity, increased trehalose-6-phosphatase activity, and an accumulati

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21

Harrison, Helen A. "Phenotypic and Molecular Characterization of the Beetle Pathogens Paenibacillus popilliae and Paenibacillus lentimorbus." Thesis, Virginia Tech, 1999. http://hdl.handle.net/10919/44890.

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DNA similarity studies were used to determine the species of thirty-one strains of bacteria isolated from the hemolymph of infected larvae from Mexico and throughout Central and South America. Twenty-one of the strains were determined to be <I>Paenibacillus popilliae</I> and ten were found to be more closely related to <I>Paenibacillus lentimorbus</I>. Only one of the <I>P. popilliae</I> strains, an isolate from Mexico, was resistant to the antibiotic vancomycin, a trait characteristic of <I>P. popilliae</I> strains from other geographic areas. As expected, all <I>P. lentimorbus</I> strains

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22

Hapairai, Limb K. M. "Studies on Aedes polynesiensis introgression and ecology to facilitate lymphatic filariasis control." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:8bc43695-4394-4a56-b83d-0a5ffe2dbebd.

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The mosquito Aedes polynesiensis, a member of the Aedes scutellaris complex, is the main vector in the South Pacific region of the Wuchereria bancrofti parasite, the causative agent of lymphatic filariasis (LF), and is also a major nuisance biter. Decades of Mass Drug treatment (MDA) have not been successful in elimination LF. Two non-vector species in the Ae. scutellaris complex were introgressed with Ae. polynesiensis to attempt to obtain lines that would produce cytoplasmic incompatibility (CI) with wild populations and/or LF-refractoriness. Despite selection of progeny from Brugia-challeng

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23

Eckstein, Barbara. "Enfezamento do brócolis: identificação molecular de fitoplasmas, potenciais insetos vetores e hospedeiros alternativos, e análise epidemiológica da doença." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-17092010-162527/.

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O brócolis (Brassica oleraceae var. italica) é uma das hortaliças mais importantes do país, cujo volume de comercialização na CEAGESP é de aproximadamente 13 mil toneladas por ano. Recentemente, uma nova doença tem causado perdas relevantes para as culturas instaladas na maior região produtora do Estado de São Paulo. Os sintomas característicos da doença são expressos pelo enfezamento da planta e necrose dos vasos de floema. Devido ao fato destes sintomas indicarem a presença de fitoplasmas nas culturas de repolho e couve-flor, localizadas na mesma região geográfica onde foi observada esta nov

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McNamee, Peter James. "The equilibrium structure and behavior of defoliating insect systems." Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/27439.

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Defoliating insect systems, defined for the purposes of this thesis as being composed of insects which defoliate forest trees and the species with which they interact, such as their host trees and their natural enemy complexes, exhibit a wide variety of population behaviors. Similarly, a number of theories and models have been proposed to explain these behaviors. These theories emphasize the importance of different ecological processes, often concentrate on the defoliator and overlook the importance of other components. Also, much of the current understanding of the dynamics of these systems

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25

Rugno, Gabriel Rodrigo. "Seletividade de inseticidas utilizados na cultura dos citros ao predador Ceraeochrysa cubana (Hagen, 1861) (Neuroptera: Chrysopidae), desenvolvimento em diferentes temperaturas e diversidade de crisopídeos em propriedades com manejo intensivo e convencional de Diaphorina citri Kuwayama (Hemiptera: Liviidae)." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-23042013-112046/.

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O crisopídeo Ceraeochrysa cubana (Hagen, 1861) é um importante predador na cultura dos citros. Apesar da grande importância de C. cubana, pouco se conhece sobre a biologia e o efeito dos inseticidas a este crisopídeo, o que seria fundamental para um programa de Manejo Integrado de Pragas. Com essa pesquisa objetivou-se avaliar o efeito: a) letal e subletal de inseticidas aplicados sobre ovos com 3 idades diferentes; b) letal e subletal de inseticidas sobre larvas de primeiro instar; c) letal e subletal de inseticidas aplicados sobre pupas e adultos; d) do manejo de Diaphorina citri Kuwayama (H

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26

Vendrami, Daniel Pagotto. "Estudos populacionais de Triatoma sordidae e Triatoma costalimai (Hemiptera:Reduviidae) baseado em marcadores mitocondriais e morfometria geométrica." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/99/99131/tde-22122017-114847/.

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Triatoma sordida é considerada de importância secundária no ciclo da Doença de Chagas humana, uma vez que vem ocupando o lugar de Triatoma infestans no peri-domicílio das casas. Triatoma costalimai é considerada uma espécie silvestre e endêmica do cerrado brasileiro. Recentemente tem ocorrido um aumento do número de invasões domiciliares por T. sordida e T. costalimai, devido ao impacto causado pelo homem no meio ambiente. Ambas as espécies já foram encontradas naturalmente infectadas por Trypanosoma cruzi e, portanto, contribuem para o ciclo antropozoótico da doença. O presente trabalho teve

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St, John Oliver Tudor Lockhart. "Genome engineering and gene drive in the mosquito aedes aegypti." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:1251080e-cf7b-4bdd-b01e-d01748ead2d2.

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Genetic control strategies are a novel method for reducing populations of pest insects such as the yellow fever mosquito Aedes aegypti, a major vector of several important arboviral diseases. This thesis describes efforts to develop new tools to engineer the Ae. aegypti genome and to better understand existing tools, and furthermore to use these to engineer a gene drive system in Ae. aegypti. The piggyBac transposon was found to be extremely stable in the germline of Ae. aegypti, and transposons engineered into the germline could not be remobilized with either an endogenous or exogenous source

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Walter, Cheryl Tracy. "Establishing experimental systems for studying the replication biology of Providence virus." Thesis, Rhodes University, 2009. http://hdl.handle.net/10962/d1003987.

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Providence virus (PrV) is a member of the Tetraviridae, a family of small, positive sense, single-stranded RNA viruses, which characteristically infect the midgut tissue of heliothine larvae. PrV is the only known tetravirus that replicates in cultured insect cells. The virus comprises a monopartite genome resembling members of the genus Betatetravirus with the capsid precursor protein undergoing autoproteolytic cleavage at its C-terminus consistent with other tetravirus capsid precursor proteins. Analysis of viral cDNA predicted the presence of three potential overlapping gene products (from

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29

Walton, Angela Jasmin. "Radiation biology of Eldana saccharina Walker (Lepidoptera: Pyralidae)." Thesis, Stellenbosch : University of Stellenbosch, 2011. http://hdl.handle.net/10019.1/6685.

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Kawamata, Carlos Eduardo Malvezzi. "Identificação de possíveis genes relacionados com a infecção por Trypanosoma cruzi no hospedeiro." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/42/42135/tde-02082012-083705/.

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A doença de Chagas é causada pelo protozoário Trypanosoma cruzi e atinge cerca de 12 milhões de pessoas no continente americano, a forma clássica de transmissão ocorre por intermédio do inseto vetor da subfamília Triatominae, popularmente chamado de barbeiro.Em um trabalho anterior, foi realizada uma análise de segregação complexa que indicou a presença de um gene principal, com um componente multifatorial influenciando a predisposição à infecção por Trypanosoma cruzi. A população é composta por 4697 indivíduos pertencentes a 886 famílias vindas do Nordeste do Brasil e tiveram os dados e amost

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Freitas, Debora Maria Sansini. "Tomato severe rugose virus (ToSRV) e Tomato chlorosis virus (ToCV): relações com a Bemisia tabaci biótipo B e eficiência de um inseticida no controle da transmissão do ToSRV." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11135/tde-25102012-083603/.

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A cultura do tomateiro (Solanum lycopersicum L.) é importante mundialmente devido ao alto consumo de seus frutos. Nos últimos anos surgiram nesta cultura no Brasil alguns vírus emergentes com altas taxas de disseminação, como begomovírus e crinivírus, transmitidos pela Bemisia tabaci biótipo B, que podem causar danos à produção do tomateiro. A espécie de begomovírus atualmente mais encontrada no Brasil, em plantios de tomateiro, é o Tomato severe rugose virus (ToSRV). De 2002 a 2004, pesquisadores relataram incidências desse vírus em mais da metade das amostras com sintomas de geminiviroses co

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Manley, Robyn Anna. "Emerging viral diseases of pollinating insects." Thesis, University of Exeter, 2017. http://hdl.handle.net/10871/29677.

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The risks posed by rapidly evolving RNA viruses to human and animal health are well recognized. Epidemics in managed and wildlife populations can lead to considerable economic and biodiversity losses. Yet, we lack understanding of the ecological and evolutionary factors that promote disease emergence. Host-switching viruses may be a particular threat to species important for human welfare, such as pollinating bees. Both honeybees and wild bumblebees have faced sharp declines in the last decades, with high winter mortality seen in honeybees. Infectious and emerging diseases are considered one o

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Felipe, Rafaella Teles Arantes. "Avaliação da resistência à Candidatus Liberibacter asiaticus em laranja doce expressando o gene attA ou hrpN." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/11/11144/tde-23032012-093114/.

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Huanglongbing (HLB), considerada uma das mais graves doenças dos citros, está associada a Candidatus Liberibacter spp., bactérias endógenas restritas ao floema e de difícil cultivo em meio de cultura. Diferentemente de outras doenças que afetam plantas cítricas, ainda não foram encontradas dentro do gênero Citrus espécies resistentes ao HLB. Genes de interesse agronômico têm sido empregados na transformação genética de citros visando a resistência a doenças. Dentre estes, destacam-se os que conferem resistência a bactérias incluindo attA, que codificam os peptídeos antibacterianos atacinas, e

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Pullen, Janice Gaye. "Development of novel baclovirus expression vectors using the 39K gene promoter." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260189.

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Andrade, Mateus Ramos de. "Efeitos do risco de predação por Toxorhynchites theobaldi (Diptera, Culicidae) no comportamento de mosquitos silvestres." Universidade Federal de Viçosa, 2011. http://locus.ufv.br/handle/123456789/3991.

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Made available in DSpace on 2015-03-26T13:30:51Z (GMT). No. of bitstreams: 1 texto completo.pdf: 408527 bytes, checksum: 3f5ff39d24998982838ce196768d85c4 (MD5) Previous issue date: 2011-02-18<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>Predators capture, kíll and consume theír prey. Thís ís the only ap- proach consídered ín rnost studíes Of predator-prey ínteractíons. However, sorne recent studíes have been concerned Wíth the índírect effects Of pre- datíorL When threatened, prey can change theír behavíor, thus reducing theír chances Of death. Frorn thís perspectíve,

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Ng, Sin Joe. "The Effect of Mid-season Foliar Fungicide and Insecticide, Applied Alone or in Combination, on Soybean Yield in Ohio." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1491986629962156.

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Bacon, Rachel Elisabeth. "Studies of the abdominal-A gene of the mosquito Aedes aegypti." Thesis, University of Liverpool, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284158.

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Comley, Iain Laurence. "Towards a germline transformation system in the medically important mosquito, Aedes Aegypti." Thesis, University of Liverpool, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316537.

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Tomaseto, Arthur Fernando. "Capacidade de dispersão de Diaphorina citri Kuwayama (Hemiptera: Psyllidae)." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-21022013-160927/.

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O Greening ou Huanglongbing (HLB) é a doença mais devastadora dos citros na atualidade. Levantamentos mostram que a enfermidade está presente em cerca de 60% dos talhões do parque citrícola paulista, demostrando sua grande capacidade de disseminação. O psilídeo-asiático-dos-citros, Diaphorina citri Kuwayama (Hemiptera: Psylidae) é um importante vetor dos agentes causais associados ao HLB. Sua capacidade de dispersão está intimamente relacionada ao progresso da doença no campo. Não se tem conhecimento dos principais fatores que possam interferir no deslocamento do inseto até plantas cítricas. S

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Kadango, Tendayi Lovemore. "Farmers' perceptions of insect pests in the Eastern Cape maize-based cropping systems and the effects of crop residue management on insect pest populations." Thesis, University of Fort Hare, 2018. http://hdl.handle.net/10353/6202.

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Maize (Zea mays L.) is one of the most important crops in South Africa that is cultivated for food, feed and as a cash crop. Maize in the Eastern Cape is typically grown for consumption and the Province is one of the least producers owing to small landholdings, poor production conditions and pests. This study investigated: (i) the different maize cropping systems smallholder farmers practice in the Eastern Cape (EC), (ii) the major maize insect pests within the identified cropping systems, (iii) the perceptions of Eastern Cape smallholder maize farmers on the effects of insect pests, and (iv)

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Campo, Clara Beatriz Hoffmann. "Role of the flavonoids in the natural resistance of soyabean to Heliothis virescens (F.) and Trochoplusia ni (Huebner)." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308559.

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Balbinotte, Juliana. "Desenvolvimento de sistemas de aquisição de Bacillus thuringiensis por Diaphorina citri Kuwayama (Hemiptera:Psyllidae) para estudos de patogenicidade." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-22032012-111908/.

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Bacillus thuringiensis (Bt) é uma bactéria entomopatogênica utilizada como biopesticida contra insetos, principalmente Lepidoptera, Coleoptera e Diptera, e na produção de organismos geneticamente modificados. Com a descoberta da capacidade de Bt se movimentar sistemicamente em plantas, potencialmente atingindo insetos sugadores, surge uma nova possibilidade para o controle de Diaphorina citri Kuwayama, que transmite bactérias associadas ao Huanglongbing, uma séria doença da citricultura. O objetivo do trabalho foi desenvolver sistemas de aquisição de Bt por D. citri, in vitro e in planta, para

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DeGomez, Tom, and Gregg Garfin. "Insects, Diseases and Abiotic Disorders in Southwest Forests and Woodlands." College of Agriculture, University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/583201.

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Revised; Originally published: 2006<br>5 pp.<br>Recent events in the forests of the Southwest, and across western North America, have prompted scientists to consider the role of climate variability in insect and disease cycles. Studies focusing on Arizona and other southwestern states point to multiple, interacting climate-related mechanisms that increase the propensity for forest mortality. Effects of insects on forests are complex, and species and site dependent. Many influences, such as drought, decreased precipitation, increased temperature, increased vapor pressure deficit, and increased

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Morris, Emily. "Identifying Spatial Data Needs for Chagas Disease Mitigation." Thesis, University of Oregon, 2015. http://hdl.handle.net/1794/19312.

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The objective of this thesis is to analyze how existing data can address Chagas disease transmission risk in South America given data availability. A literature review was conducted to determine prominent variables that models use to assist with Chagas disease mitigation efforts, followed by a Web search to collect publicly available spatial data pertaining to these variables. The data were then used to create maps of data availability and in an agent-based model to identify which variables are most associated with disease transmission risk. Data availability varied widely across South Ameri

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Narita, Nobuyoshi 1961. "Epidemiologia do "Cowpea aphid borne mosaic virus" (CABMV) em maracujazeiros na região produtora da Alta Paulista, SP /." Botucatu : [s.n.], 2007. http://hdl.handle.net/11449/103210.

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Resumo: Dos vírus que infectam o maracujazeiro no Brasil, atualmente o Cowpea aphid borne mosaic virus (CABMV), é considerado fator limitante à cultura. Dependendo da velocidade de disseminação e idade com que as plantas são infectadas no campo, a cultura torna-se comercialmente improdutiva. O presente estudo teve como objetivo, avaliar a diversidade e a dinâmica populacional dos afídeos na região da Alta Paulista, SP e a possibilidade de transmissão do vírus pela semente. Assim, quatro locais (Leste e Oeste da cidade de Marília e Municípios de Ocauçú e Guaimbê) foram monitorados durante 24 me

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Hepburn, Colleen. "Composition and phenology of insect pests of Capsicum (Solanaceae) cultivated in the Makana District, Eastern Cape Province, South Africa." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1005339.

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Capsicum baccatum var. pendulum was first grown in the Makana District in 2005. Extremely little was known about best practices for cultivation or the insects and diseases associated with the crop in this area. The study was conducted during the second year of production, November 2005 and November 2006, in an attempt to identify the composition and phenology of insects occurring on C. baccatum. In the more rural parts of the Eastern Cape, and more particularly in Grahamstown, there are very few industries. With the advent of this new agricultural venture, a processing factory has been opened

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Coetzee, J. H. (Jacobus Hendrik). "Arthropod communities of Proteaceae with special emphasis on plant-insect interactions." Thesis, Stellenbosch : Stellenbosch University, 1989. http://hdl.handle.net/10019.1/66615.

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Thesis (PhD) -- Stellenbosch University, 1989.<br>ENGLISH ABSTRACT: Arthropod communities of five proteaceous species viz. Protea repens. P. neriifolia. P.cynaroides, Leucospermum cordifolium and Leucadendron /aureolum were studied. A faunal list of the insects was compiled according to the feeding guilds of insects. Six phytophagous guilds were recognized: flower visitors, thrips, endophages, ectophages, sap-suckers, and ants. The guild composition, species packing and seasonal distribution for the free-IMng insects, spiders and other arthropods were investigated on the different plant

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Marques, Rodrigo Neves. "Cigarrinhas (Hemiptera: Cicadellidae) potenciais vetoras de um fitoplasma (grupo 16SrlX) associado a sintomas de Huanglongbing dos citros, suas plantas hospedeiras e quantificação do patógeno." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/11/11146/tde-02052011-092707/.

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O Huanglongbing (HLB) é uma das mais temidas doenças da citricultura mundial, associada a bactérias do gênero Candidatus Liberibacter, que foram detectadas no Brasil em 2004. Em 2008, detectou-se outra bactéria associada a sintomas de HLB no Estado de São Paulo, que foi caracterizada como sendo um fitoplasma do grupo 16 SrIX. Fitoplasmas são molicutes fitopatógenos restritos ao floema de plantas, disseminados por insetos vetores. O presente trabalho buscou identificar cigarrinhas potencialmente vetoras do fitoplasma associado ao HLB e plantas hospedeiras desses insetos, bem como desenvolver um

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Engelbrecht, Rene. "The role of the mediterranean fruit fly, Ceratitis capitata, in Botrytis bunch rot of grape." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53168.

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Thesis (MScAgric)--University of Stellenbosch, 2002.<br>ENGLISH ABSTRACT: Botrytis bunch rot of grape is caused by Botrytis cinerea Pers. :Fr. Conidia of the pathogen, which is dispersed by wind, water droplets and by insects, can penetrate the intact grape berry cuticle, but disease expression occurs only under predisposing conditions. Since relatively high infection rates often occur in vineyards, predisposing factors must play a fundamental role in primary infection and subsequent disease occurrence. Insects can play a very important role in this regard by depositing inocula at wound

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Rogers, Richard E. L. "Insect and mite monitoring in commercial apple orchards in Nova Scotia (1979-1985)." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65368.

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