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Dissertations / Theses on the topic 'Insects as biological pest control agents'

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Published: 4 June 2021

Last updated: 30 January 2023

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1

Chang, Gary C. "Ecological interaction among natural enemies and its consequences for biological control /." Thesis, Connect to this title online; UW restricted, 2000. http://hdl.handle.net/1773/5205.

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2

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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3

Baker, Jeanine. "Factors affecting the establishment of a classical biological control agent, the horehound plume moth (Wheeleria spilodactylus) in South Australia." Title page, summary and contents only, 2002. http://web4.library.adelaide.edu.au/theses/09PH/09phb1677.pdf.

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Includes bibliographical references (leaves 168-198) The horehound plume moth (Wheeleria spilodactylus Curits), an agent introduced to control the invasive weed horehound (Murrubium vulgare L.), was used as a model system to investigate factors believed to influence the successful establishment of an introduced natural enemy. Retrospectively tests the use of generic population viability analysis and decision making tools for determining optimal release strategies for the horehound plume moth in South Australia and to compare outcomes with the emprical data collected during the course of this p

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4

Williams, Elizabeth Catherine. "Entomopathogenic nematodes as control agents of statutory insect pests." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265978.

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5

Alfaro, Lemus Ana Lilia. "Factors influencing the control of citrophilous mealybug Pseudococcus calceolarie (Maskell) by Coccophagus gurneyi Compere in the Riverland of South Australia." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09IM/09iml562.pdf.

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Includes bibliographical references (leaves 102-114) The highly successful biological control of the citrophilous mealybug Pseudococcus calceolarie (Maskell) (CM) by the parasitic wasp Coccophagus gurneyi Compere in several countries led to the release of this parasitoid in the Riverland of South Australia as part of an integrated pest management program. However CM has not been successfully controlled in this region. The results of this study may help to explain the lack of effective biological control of CM in Riverland citrus.

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6

Straub, Cory Severen. "Exploring the relationship between natural enemy biodiversity and herbivore suppression." Online access for everyone, 2006. http://www.dissertations.wsu.edu/Dissertations/Fall2006/c_straub_111306.pdf.

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7

Vieira, Natalia Fernanda. "Metodologia de criação, aspectos biológicos e custo de produção de Xylocoris afer predando ovos de Corcyra cephalonica e Plutella xylostella /." Jaboticabal, 2016. http://hdl.handle.net/11449/144308.

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Orientador: Sergio Antonio De Bortoli<br>Banca: Roberto Marchi Goulart<br>Banca: Raphael de Campos Castilho<br>Resumo: O objetivo desta pesquisa foi adequar uma metodologia de criação para o predador Xylocoris afer e avaliar, bem como aspectos biológicos e o custo de produção predando ovos de Corcyra cephalonica ou Plutella xylostella. Visando otimizar e adequar uma metodologia para multiplicação de X. afer em condições de laboratório, foi estabelecida uma colônia do predador utilizando como referência, a metodologia de criação de outra espécie de Anthocoridae, Orius insidiosus. Porém, nos rec

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8

Barnewall, Emily C., and University of Lethbridge Faculty of Arts and Science. "Plant-insect interactions between yellow toadflax, Linaria vulgaris, and a potential biocontrol agent, the gall-forming weevil, Rhinusa pilosa." Thesis, Lethbridge, Alta. : University of Lethbridge, Department of Biological Sciences, c2011, 2011. http://hdl.handle.net/10133/2618.

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Yellow toadflax, Linaria vulgaris (L.) Mill. (Plantaginaceae), is a non-native invasive plant. Rhinusa pilosa Germar (Coleoptera: Curculionidae) is a proposed biocontrol agent. Gall development by R. pilosa was described using histological methods and compared between plant populations from native and introduced ranges. Key stages of oviposition were isolated histologically to determine their importance in gall induction. Rhinusa pilosa galled and developed on four geographically distinct Canadian populations in a pre-release quarantine study. Low agent densities only negatively affected one p

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9

Östman, Örjan. "Landscape and farm management influence generalist predators : effects on condition, abundance, and biological control /." Uppsala : Swedish University of Agricultural Sciences, 2002. http://diss-epsilon.slu.se/archive/00000207/.

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Thesis (doctoral)--Swedish University of Agricultural Sciences, 2002.<br>Thesis documentation sheet inserted. Appendix reprints five published papers and manuscripts, three co-authored with others. Includes bibliographical references. Also available electronically via World Wide Web in PDF format; online version lacks appendix.

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10

Wardill, Trevor James. "Genetic diversity in the biological control process : Acacia nilotica as a test case /." [St. Lucia, Qld.], 2006. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe19170.pdf.

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11

Goble, Tarryn Anne. "Investigation of entomopathogenic fungi for control of false codling moth, Thaumatotibia leucotrata, Mediterranean fruit fly, Ceratitis capitata and Natal fruit fly, C. rosa in South African citrus." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005409.

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The biology of key citrus pests Thaumatotibia leucotreta Meyrick (Lepidoptera: Tortricidae), Ceratitis capitata Wiedemann (Diptera: Tephritidae) and Ceratitis rosa Karsch (Diptera: Tephritidae) includes their dropping from host plants to pupate in the soil below citrus trees. Since most EP fungi are soil-borne microorganisms, the development and formulation of alternative control strategies using these fungi as subterranean control agents, targeted at larvae and pupae in the soil, can potentially benefit existing IPM management of citrus in South Africa. Thus, a survey of occurrence of entomop

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12

Siqueira, Matheus Alves de. "Himenópteros parasitoides de Pseudococcidae (Hemiptera: Coccomorpha) no estado de São Paulo." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/157287.

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13

Jenkins, Paul E. "Control of the grape berry moth, Paralobesia viteana, using reduced-risk insecticides, cultural controls, and conservation of natural enemies." Diss., Connect to online resource - MSU authorized users, 2006.

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14

Fairbairn, Jonathan Paul. "Spatial and temporal dynamics of entomopathogenic nematodes." Thesis, University of Stirling, 2001. http://hdl.handle.net/1893/26685.

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The life-history and infection parameters of the entomopathogenic nematodes Steinernema feltiae (Filipjev)(Nematoda:Rhabditida) and Heterorhahditis megidis (Poinar, Jackson & Klein)(Nematoda:Rhabditida) were examined to provide specific details for the construction of mathematical SI models for biological control of soil insect pests. Laboratory experiments using the Greater Waxmoth, Galleria mellonella as the model host were undertaken to specifically examine the transmission behaviour of infective juvenile nematodes. The proportion of infective juveniles of S. feltiae which infected hosts wa

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15

Matta, Danilo Henrique da [UNESP]. "Hábito alimentar e morfologia do aparelho digestivo de espécies de Carabidae (Insecta: Coleoptera) associados a plantas herbáceas e ao algodoeiro colorido." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/110312.

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Made available in DSpace on 2014-11-10T11:09:36Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-02-27Bitstream added on 2014-11-10T11:58:13Z : No. of bitstreams: 1 000793362.pdf: 2171550 bytes, checksum: cc9265ec01ac15bf4f3b278d742c1e9a (MD5)<br>Os besouros Carabidae (Coleoptera) apresentam grande importância para a agricultura como inimigos naturais de insetos pragas. No entanto, pouco se conhece sobre hábitos alimentares desses besouros. O presente trabalho visou verificar a ocorrência e o hábito alimentar de espécies de carabídeos associadas a plantas herbáceas floríferas nos difer

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16

Matta, Danilo Henrique da. "Hábito alimentar e morfologia do aparelho digestivo de espécies de Carabidae (Insecta: Coleoptera) associados a plantas herbáceas e ao algodoeiro colorido /." Jaboticabal, 2014. http://hdl.handle.net/11449/110312.

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Orientador: Francisco Jorge Cividanes<br>Banca: Antonio Carlos Busoli<br>Banca: Sergio Ide<br>Resumo: Os besouros Carabidae (Coleoptera) apresentam grande importância para a agricultura como inimigos naturais de insetos pragas. No entanto, pouco se conhece sobre hábitos alimentares desses besouros. O presente trabalho visou verificar a ocorrência e o hábito alimentar de espécies de carabídeos associadas a plantas herbáceas floríferas nos diferentes Períodos fenológicos do algodoeiro colorido. O conteúdo alimentar foi avaliado em espécies presentes em cultura de algodoeiro colorido, Gossypium h

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17

Maeda, Jaqueline Midori [UNESP]. "Influência da sinigrina no comportamento de busca e seleção de presas pelo predador Orius insidiosus (Say, 1832) (Hemiptera: Anthocoridae)." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/91317.

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Made available in DSpace on 2014-06-11T19:25:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-12-18Bitstream added on 2014-06-13T19:32:16Z : No. of bitstreams: 1 maeda_jm_me_jabo.pdf: 465784 bytes, checksum: 874c1d11209485811452057c1724aded (MD5)<br>Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)<br>O objetivo foi investigar a influência da sinigrina no comportamento de busca e seleção do predador Orius insidiosus (Say, 1832) (Hemiptera: Anthocoridae) pela presa Plutella xylostella (L., 1758)

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18

Maeda, Jaqueline Midori. "Influência da sinigrina no comportamento de busca e seleção de presas pelo predador Orius insidiosus (Say, 1832) (Hemiptera: Anthocoridae) /." Jaboticabal, 2012. http://hdl.handle.net/11449/91317.

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Orientador: Sérgio Antônio De Bortoli<br>Banca: Odair Aparecido Fernandes<br>Banca: Laila Herta Mihsfeldt<br>Resumo: O objetivo foi investigar a influência da sinigrina no comportamento de busca e seleção do predador Orius insidiosus (Say, 1832) (Hemiptera: Anthocoridae) pela presa Plutella xylostella (L., 1758) (Lepidoptera: Plutellidae). Foi avaliado o desenvolvimento, reprodução e preferência de O. insidiosus predando lagartas de P. xylostella alimentadas com sinigrina. Foi possível observar que os predadores que consumiram lagartas alimentadas com folhas de couve pulverizadas com sinigrina

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19

Anthony, Antoinette. "Toadflax, fire, Mecinus janthinus, and compensatory growth." Connect to this title online, 2005. http://www.montana.edu/etd/available/anthony_0805.html.

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Professional paper (M.S.)--Montana State University--Bozeman, 2005.<br>Title from PDF t.p. (viewed on July 4, 2006). Chairperson, Graduate Committee: Theodore Weaver. Includes bibliographical references (leaves 54-57).

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20

Machado, Laerte Antonio. "Estudos biologicos e comportamentais de Migdolus fryanus (Westwood, 1863) (Coleoptera : vesperidae) e sua interação com nematoides entomopatogenicos, e outros agentes de mortalidade." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/315380.

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Orientador: Mohamed Ezz El-Din Moustafa Habib<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Biologia<br>Made available in DSpace on 2018-08-06T00:00:47Z (GMT). No. of bitstreams: 1 Machado_LaerteAntonio_D.pdf: 3114072 bytes, checksum: 0acdc16c3e74bbcf31c44aff1652b8f8 (MD5) Previous issue date: 2006<br>Resumo: No presente estudo registraram-se dados biológicos e morfológicos de Migdolus .fryanus (Westwood, 1863) (Coleoptera: Vesperidae), praga da cultura da cana-de-açúcar. Machos e fêmeas, imediatamente após o acasalamento eram coletados em campo, trazidos ao laboratór

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21

Paterson, Iain Douglas. "Biological control of Pereskia aculeata Miller (Cactaceae)." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1007653.

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Pereskia aculeata Miller (Cactaceae) is an environmental weed that is damaging to natural ecosystems in South Africa. The plant is native to Central and South America and was first recorded in South Africa in a botanical garden in 1858. In this thesis, research into the biological control of P. aculeata was conducted with the intention of improving the control of the weed. A pre-release study of the relationship between P. aculeata density and native plant biodiversity indicated that P. aculeata has a negative impact on native biodiversity. The native plant biodiversity associated with differe

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22

Bell, Howard A. "The tritrophic interactions between a pest noctuid, beneficial biological control agents and genetically modified crops expressing anti-insect genes." Thesis, University of Newcastle Upon Tyne, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250188.

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23

Tobin, Michael. "The characterisation of a nucleopolyhedrovirus infecting the insect Trichoplusia ni." Thesis, Cape Peninsula University of Technology, 2019. http://hdl.handle.net/20.500.11838/2979.

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Thesis (MSc (Biomedical Sciences))--Cape Peninsula University of Technology, 2019<br>Background: Baculoviruses have great potential as alternatives to conventional chemical insecticides. The large scale adoption of such agents has however been hampered by the slow killing times exhibited by these bio-insecticides, limitation to single target insect and difficulty of large scale production of these preparations. Trichoplusia ni single nucleopolyhedrovirus (TnSNPV), initially identified in the Eastern Cape region of South Africa, has potential as a biocontrol agent as it possesses a higher speed

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24

Coombes, Candice Anne. "Entomopathogenic fungi for control of soil-borne life stages of false codling moth, Thaumatotibia leucotreta (Meyrick) (1912) (Lepidoptera: Tortricidae)." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1002057.

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False codling moth (FCM), Thaumatotibia leucotreta is an extremely important pest of citrus in South Africa and with the shift away from the use of chemicals, alternate control options are needed. One avenue of control which has only recently been investigated against the soil-borne life stages of FCM is the use of entomopathogenic fungi (EPF). In 2009, 12 entomopathogenic fungal isolates collected from South African citrus orchards showed good control potential during laboratory conducted bioassays. The aim of this study was to further analyse the potential of these isolates through concentra

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25

Crowe, Michael, and University of Lethbridge Faculty of Arts and Science. "Ecological interactions between insect herbivores and their host plant in a weed biocontrol system." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2003, 2003. http://hdl.handle.net/10133/637.

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The role of interspecific competition as a regulating force in natural populations has been controversial, especially for phytophagous insect communities. A series of manipulative experiments using enclosure cages were conducted to evaluate the role of interspecific competition between a weevil and a fly, two seed feeding agents released against spotted knapweed in North America. The fly, an inferior biological control agent, was the superior competitor. Consequences of the antagonistic interaction included reduced seed destruction compared to if just the weevil was released on its own. The ro

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26

Weyl, Philip Sebastian Richard. ""Is more, less?" : insect-insect interactions in a biological control context using water hyacinth as a model." Thesis, Rhodes University, 2012. http://hdl.handle.net/10962/d1005410.

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Interactions between insects have been shown to be important regulators of population abundances and dynamics as well as drivers of spatial segregation and distribution. These are important aspects of the ecology of insects used in biological control and may have implications for the overall success of a particular programme. In the history of biological control there has been a tendency to release a suite of agents against a weed, which in some cases has increased the level of success, while in others little change has been observed. In most of these cases the implications of increasing the l

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27

Love, Claire Natalie. "The biology, behaviour and survival of pupating false codling moth, Thaumatotibia leucotreta (Meyrick) (Lepidoptera: Tortricidae), a citrus pest in South Africa." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1018907.

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Control of the citrus pest, false codling moth (FCM), Thaumatotibia leucotreta Meyrick (Lepidoptera: Tortricidae) is crucial for the South African citrus industry. The economic losses and phytosanitary status of this pest, coupled with increased consumer awareness and demands, has created a need for effective, IPM-compatible control measures for use against the soil-dwelling life stages of FCM. Promising developments in the field of microbial control through the use of entomopathogenic fungi (EPF) and entomopathogenic nematodes (EPNs) have highlighted the need for research regarding pupation b

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28

Tourle, Robyn. "Effects of ant predation on the efficacy of biological control agents Hypena Laceratalis Walker (Lepidoptera : noctuirdae) ; Falconia intermedia Distant (Hemiptera : Miridae and Teleonemia scrupulosa Stål (Hemiptera: Tingidae) on Lantana Camara (Verbenaceae) in South Africa." Thesis, Rhodes University, 2010. http://hdl.handle.net/10962/d1005362.

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Lantana camara L. (Verbenaceae) remains a highly invasive and ecologically damaging weed in South Africa, despite some 50 years of biological control efforts. Lack of success has been ascribed to varietal differences, climate and predation of agents but these have not been tested. In this study, the effects of ant predation were tested on populations of three biological control agents for L. camara. Colonies of two species, Crematogaster sp. 1 and 2 were investigated. Crematogaster sp. 1 colonies were offered no choice between immature stages of the agents Hypena laceratalis Walker (Lepidopter

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29

Ruiz, Ana Carolina. "Virulência de Nomuraea rileyi à Spodoptera frugiperda e perfil protéico do secretoma em presença da cutícula do inseto." reponame:Repositório Institucional da UCS, 2016. https://repositorio.ucs.br/handle/11338/1811.

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A viticultura é uma atividade de grande importância econômica, destacando-se a sustentabilidade da pequena propriedade e o desenvolvimento territorial associados às atividades ligadas ao turismo. As plantas cultivadas se tornam vulneráveis a patógenos e insetos-praga e a videira apresenta diversas espécies consideradas pragas que reduzem sua produção e rentabilidade, entre estas, Spodoptera frugiperda, causando danos em diferentes partes da planta. Fungos entomopatogênicos podem oferecer uma alternativa aos pesticidas convencionais para o controle de pragas, pois produzem enzimas que degradam

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30

DiLuna, Francis Anthony. "INHIBITORY PROPERTIES OF MICROPLITIS CROCEIPES TERATOCYTE SECRETORY PRODUCTS AND THE RECOMBINANT PROTEIN TSP14 ON PROTEIN SYNTHESIS." Lexington, Ky. : [University of Kentucky Libraries], 2003. http://lib.uky.edu/ETD/ukyento2003t00126/FADTHES.pdf.

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Thesis (M.S.)--University of Kentucky, 2003.<br>Title from document title page (viewed June 21, 2004). Document formatted into pages; contains xii, 122 p. : Ill. Includes abstract and vita. Includes bibliographical references (p. 106-121).

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Chambers, Craig Brian. "Production of Cydia pomonella granulovirus (CpGV) in a heteralogous host, Thaumatotibia Leucotreta (Meyrick) (False codling moth)." Thesis, Rhodes University, 2015. http://hdl.handle.net/10962/d1017906.

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Cydia pomonella (Linnaeus) (Family: Tortricidae), the codling moth, is considered one of the most significant pests of apples and pears worldwide, causing up to 80% crop loss in orchards if no control measures are applied. Cydia pomonella is oligophagous feeding on a number of alternate hosts including quince, walnuts, apricots, peaches, plums and nectarines. Historically the control of this pest has been achieved with the use of various chemical control strategies which have maintained pest levels below the economic threshold at a relatively low cost to the grower. However, there are serious

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Langa, Sílvia da Fátima. "The impact and control of waterweeds in the Southern Mozambique Basin rivers." Thesis, Rhodes University, 2013. http://hdl.handle.net/10962/d1001905.

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In Mozambique, establishment of aquatic weeds has been enhanced through the increased enrichment of water bodies by nutrient runoffs from human and agricultural wastes that lead to an increase in nitrate and phosphate in the water. The aquatic weeds, water hyacinth (Eichhornia crassipes), red water fern ( Azolla microphylla), water lettuce (Pistia stratiotes) and salvinia (Salvinia molesta) were found in most watercourses in Mozambique and are becoming aggressive in some watercourses, especially in the Umbeluzi and Incomati rivers. Farmers and people living along the rivers are aware of the ne

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Pretorius, Rudolph Johannes. "A plant health management system for aphididae on lettuce under variable shadehouse conditions in the central Free State, South Africa." Thesis, Bloemfontein : Central University of Technology, Free State, 2008. http://hdl.handle.net/11462/114.

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Thesis (M. Tech) --Central University of Technology, Free State, 2008<br>Aphids (Hemiptera: Aphididae) are amongst the most destructive insects in agricultural crop production systems. This reputation stems from their complex life cycles which are mostly linked to a parthenogenetic mode of reproduction, allowing them to reach immense population sizes within a short period of time. They are also notorious as important and efficient vectors of several plant viral diseases. Their short fecund life cycles allow them to be pests on crops with a short growth period, e.g. lettuce (Lactuca sativa L.).

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Cradock, Kenwyn R. "Interactions of Beauveria bassiana with the American dog tick, Dermacentor variabilis (Say), and the lone star tick, Amblyomma americanum L." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1123859637.

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Thesis (Ph. D.)--Ohio State University, 2005.<br>Title from first page of PDF file. Document formatted into pages; contains xv, 126 p.; also includes graphics (some col.). Includes bibliographical references (p. 96-107). Available online via OhioLINK's ETD Center

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Andrade, Crislany de Lima Barbosa [UNESP]. "Aspectos biológicos, morfometria e técnica de criação de Abaris basistriata Chaudoir, 1873 e Selenophorus seriatoporus Putzeys, 1878 (Coleoptera: carabidae)." Universidade Estadual Paulista (UNESP), 2014. http://hdl.handle.net/11449/123752.

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Made available in DSpace on 2015-06-17T19:33:50Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-11-28. Added 1 bitstream(s) on 2015-06-18T12:47:56Z : No. of bitstreams: 1 000829422.pdf: 524601 bytes, checksum: 210d97beb70a39352f55934372eaddfa (MD5)<br>Os carabídeos (Coleoptera: Carabidae) são reconhecidos mundialmente como importantes agentes de controle biológico de pragas agrícolas. Os objetivos deste trabalho foram estudar os aspectos biológicos, morfometria e técnica de criação de Abaris basistriata Chaudoir, 1873 (Harpalinae: Pterostichini) e Selenophorus seriatoporus Putzeys, 18

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Andrade, Crislany de Lima Barbosa. "Aspectos biológicos, morfometria e técnica de criação de Abaris basistriata Chaudoir, 1873 e Selenophorus seriatoporus Putzeys, 1878 (Coleoptera: carabidae) /." Jaboticabal, 2014. http://hdl.handle.net/11449/123752.

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Orientador: Francisco Jorge Cividanes<br>Banca: Sérgio Ide<br>Banca: Amarildo Pasini<br>Banca: Raphael de Campos Castilho<br>Banca: Arlindo Leal Boiça Junior<br>Resumo: Os carabídeos (Coleoptera: Carabidae) são reconhecidos mundialmente como importantes agentes de controle biológico de pragas agrícolas. Os objetivos deste trabalho foram estudar os aspectos biológicos, morfometria e técnica de criação de Abaris basistriata Chaudoir, 1873 (Harpalinae: Pterostichini) e Selenophorus seriatoporus Putzeys, 1878 (Harpalinae: Harpalini) utilizando como dieta larvas de Tenebrio molitor Linnaeus, 1758 (

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Ruan, Chuan Qing. "Study on biological control of some pest thrips species using predatory insects." Göttingen Cuvillier, 2009. http://d-nb.info/997663006/04.

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Robinson, Peter. "Physiological studies on the aphid pathogen Erynia neoaphidis with a view to its use as a biological control agent in the field." Thesis, King's College London (University of London), 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283833.

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Tremblay, Annie C. "The role of birds as predators and potential biocontrol agents of insect pests in corn fields." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ50898.pdf.

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Avila, Aristobulo Lopez. "A comparative study of four species of Encarsia (Hymenoptera: Aphelinidae) as potential control agents for Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae)." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/7478.

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Begum, Mahmuda. "Habitat manipulation to enhance biological control of lightbrown apple moth (Epiphyas postvittana) /." Connect to full text, 2004. http://hdl.handle.net/2123/690.

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Lorraine, Debrah F. "Oxidation of plant allelochemicals by phytophagous sucking insects." Title page, table of contents and summary only, 1995. http://web4.library.adelaide.edu.au/theses/09PH/09phl876.pdf.

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Addendum in pocket. Biblography: leaves 162-173. Phytophagous sucking insects, aphids in particular, are common pests of plants. These insects secrete salivary enzymes into their food material. One plant defence mechanism is the induction and/or accumulation of deterrent phytochemicals. In the present study, a model enzyme system was chosen to mimic the oxidative activity of insect saliva. Isolation and sructural identification of the products of plant allelochemicals was achieved for several substrates. Insects were also exposed to individual plant chemicals in feeding "choice" tests. Prelimi

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Nigh, Edward L. Jr, Christopher Sumner, and Thomas Svodoba. "An Evaluation of Biological Agents for Control of Citrus Nematode and Liohippelates Eye Gnat." College of Agriculture, University of Arizona (Tucson, AZ), 1997. http://hdl.handle.net/10150/220522.

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Biological agents have been employed in a series of experiments to evaluate their efftcacy,in control of the citrus nematode and Liohippelates eye gnat in the Yuma mesa area. Steinernema riobravis, an entomopathological nematode, considered climatically adapted to western Arizona temperatures, was selected from commercially available sources. Three field trials and a greenhouse study utilizing the nematodes at population ratés of one and two billion juveniles per acre were each unsuccessful in reducing the nematode or insect pest. Poor viability and survival were attributed to the negative res

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Mdlangu, Thabisa Lynette Honey. "Influence of mite predation on the efficacy of the gall midge Dasineura sp. as a biocontrol agent of Australian myrtle Leptospermum laevigatum (Myrtaceae) in South Africa." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/272.

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Dasineura sp. is a gall forming midge that was introduced into South Africa for the biocontrol of the Australian myrtle, Leptospermum laevigatum. It causes galls on both the vegetative and reproductive buds of the plant. Although Dasineura sp. was initially regarded as a potentially successful agent, galling up to 99 percent of the buds of the host plant, it has been preyed on by native opportunistic mites, which caused a decline in the performance of the midge as a biocontrol agent of L. laevigatum. This raised a concern about whether this fly will be able to perform effectively in the presen

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Paliwal, Deepa. "Identification and characterisation of new aphid killing bacteria for use as biological pest control agents." Thesis, University of Reading, 2017. http://centaur.reading.ac.uk/78229/.

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Insecticide resistance and on-going legislation changes on the use of insecticides are likely to reduce their availability for use in agriculture; hence there is an urgent need to develop effective biological controls against these plant pests. Aphids are major insect pests of the agricultural and horticultural sectors. Recent work screened a range of phylloplane-residing bacteria for their ability to kill aphids and used alternative insect targets to determine host specificity. Tests with five other aphid genera indicated the bacteria were also able to kill them. However, the bacteria were ge

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Kariuki, Charles Wachira. "A new baculovirus isolate for the control of the Diamondback moth, Plutella Xylostella (L.) (Plutellidae:Lepidoptera) /." free to MU campus, to others for purchase, 1996. http://wwwlib.umi.com/cr/mo/fullcit?p9821333.

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Heystek, Fritz. "Laboratory and field host utilization by established biological control agents of Lantana camara L. in South Africa." Thesis, Rhodes University, 2006. http://eprints.ru.ac.za/255/.

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Pretorius, Danielle. "Antimicrobial lipopeptide production by Bacillus spp. for post-harvest biocontrol." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/96117.

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Thesis (MEng) -- Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: As overpopulation threatens the world’s ability to feed itself, food has become an invaluable resource. Unfortunately, almost a third of the food produced for human consumption is lost annually. Pests including insects, phytopathogens and weeds are responsible for more than a third of the annual major crop losses suffered around the world. The majority of current post-harvest control strategies employ synthetic agents. These compounds, however, have been found to be detrimental to the environment as well as human health, whi

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Ghajar, Feridon Ghasem Khan, University of Western Sydney, of Science Technology and Environment College, and of Science Food and Horticulture School. "Stimulatory and inhibitory effects of UVA and UVB radiation on some physiological and pathogenic characteristics of fungal biocontrol agents to enhance mycoherbistat effectiveness." THESIS_CSTE_SFH_Ghajar_F.xml, 2004. http://handle.uws.edu.au:8081/1959.7/621.

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Many candidate mycoherbicides have shown promise in the laboratory or greenhouse, but most have been ineffective in the field. Factors limiting mycoherbicide efficiency include temperature and humidity. Results from this thesis indicate that solar radiation has both a damaging effect(reduction in germination)limiting efficacy and a photomorphogenic effect(appressorium induction)increasing efficacy. The study has also shown significant interaction between temperature and solar radiation on the survival of conidia of potential mycoherbistats. Therefore, solar radiation should be considered as th

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Miao, Li. "Potential antifouling compounds of marine-derived fungi from Hong Kong." online access from Digital Dissertation Consortium, 2006. http://libweb.cityu.edu.hk/cgi-bin/er/db/ddcdiss.pl?3239505.

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