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Dissertations / Theses on the topic 'Pest aphid'

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Published: 5 June 2025

Last updated: 1 August 2025

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1

Couldridge, Clare Elizabeth. "Aphid-plant interactions : investigating plant molecular response with implications for aphid pest control." Thesis, University of Birmingham, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487497.

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2

Knowles, Tim C. "Alfalfa Aphid Complex." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 1998. http://hdl.handle.net/10150/146689.

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4 pp.<br>The alfalfa aphid discussed in this publication includes blue alfalfa aphid, pea aphid, and the spotted alfalfa aphid. This publication discusses the biology of these alfalfa aphids, the damages they cause, the resistant varieties and biological control, and their monitoring and treatments.

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3

Jackson, Deborah Louise. "The mechanism of resistance in Sitka spruce to the green spruce aphid." Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359316.

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4

Howard, M. T. "The factors determining the pest status of Metopolophium dirhodum (Wlk.) the rose-grain aphid." Thesis, University of East Anglia, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382861.

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5

Roy, Helen Elizabeth. "Interactions between aphid predators and the entomopathogenic fungus Erynia neoaphidis." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.362048.

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6

Saljoqu, Ahmad-Ur-Rahman. "Integrated management of potato aphid, Myzus persicae (Sulzer) in Pakistan." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284450.

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7

Warren, Peter L., and Jeff Schalau. "Aphids." College of Agriculture, University of Arizona (Tucson, AZ), 2014. http://hdl.handle.net/10150/324020.

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8

Morse, Stephen. "The integration of partial plant resistance with biological control by an indigenous natural enemy complex in affecting populations of cowpea aphid (Aphis craccivora Koch)." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.237839.

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9

Sutherland, Jamie Phillip. "Resource assessment and utilisation by aphidophagous syrphids, and its implications for integrated pest management." Thesis, Manchester Metropolitan University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389530.

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10

Orantes, Lucia C. "Population Genetics of Soybean Aphid: Elaborating Species Specific SNPs to test Bottleneck and Migration Hypotheses across North-central US and Canada." The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1314029403.

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11

Mann, Brian. "The development of a cereal aphid advisory model and an oilseed rape pest advisory model." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316418.

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12

Bonner, Tony Jo. "Ecology and physiology of the aphid pathogenic fungus Erynia neoaphidis." Thesis, University of Bedfordshire, 2002. http://hdl.handle.net/10547/324346.

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Erynia neoaphidis Remaudiere and Hennebert (Zygomycetes: Entomophthorales) is an obligate pathogen of invertebrates, especially aphids, and has therefore been studied as a possible biological control agent for a number of years. However, a number of important physiological and ecological questions regarding optimal conditions for conidial production and transmission 0 f the fungus through an aphid population had to be answered. This thesis investigated some of these aspects. Solid and liquid media were used to culture the fungus, and E. neoaphidis was cultured on a fully defined medium for the

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13

Sigfridsson, Sabine. "The role of midfield islets in pest control." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-88404.

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During last century rising populations and changed market preferences have led to large structuralchanges in agriculture in the developed world. Most conventional cultivation methods involve theproduction of few monoculture crops within a homogenous landscape, where pesticides and inorganicfertilizers are used to increase yields. The cereal aphid Rhopalosiphum padi (L.) is a pest in cerealsresulting in large economic losses for farmers throughout Europe, and are currently removed withchemical pest control. However, the pesticides also affect existing ecosystem services like potentiallypest-con

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14

Mauremootoo, John Retnon. "The effects of the manipulation of polyphagous predator numbers on cereal aphid population dynamics in a winter wheat ecosystem." Thesis, University of Southampton, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386722.

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15

Nicholas, Adrian H., of Western Sydney Hawkesbury University, and Faculty of Science and Technology. "The pest status and management of woolly aphid in an Australian apple orchard IPM program." THESIS_FST_XXX_Nicholas_A.xml, 2000. http://handle.uws.edu.au:8081/1959.7/330.

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The thesis studied the biological control of woolly aphid (Eriosoma lanigerum Hausm.) using European earwig (Forficula auricularia L.) in an Australian apple orchard IPM program. Woolly aphid populations were monitored over the 1995/96 and 1996/97 growing seasons, completing a four year study of the pest's status and management under IPM programs at Bathurst in the Central Tablelands of NSW. Woolly aphid infestation in 2 IPM treatments, based on alternative control techniques for codling moth (Cydia pomonella L.), namely mating disruption and fenoxycarb, were compared with a conventional insec

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16

Nicholas, Adrian Harry. "The pest status and management of woolly aphid in an Australian apple orchard IPM program /." View thesis, 2000. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20030624.095814/index.html.

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17

Aminu-Kano, M. "Pollutant/plant/pest interactions : sulphur dioxide, winter cereals and the grain aphid Sitobion avenae (F.)." Thesis, Imperial College London, 1987. http://hdl.handle.net/10044/1/38222.

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18

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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19

Dick, Gary, and Leon Moore. "Russian Wheat Aphid, Diuraphis noxia (Mordvillko): A New Insect Pest of Small Grains in Arizona." College of Agriculture, University of Arizona (Tucson, AZ), 1987. http://hdl.handle.net/10150/203799.

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20

Horn, Marizanne. "Transfer of genetic resistance to the Russian wheat aphid from rye to wheat." Thesis, Stellenbosch : Stellenbosch University, 1997. http://hdl.handle.net/10019.1/55770.

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Thesis (MSc.) -- Stellenbosch University, 1997.<br>ENGLISH ABSTRACT: An octoploid triticale was derived from the F1 of a Russian wheat aphid resistant rye, 'Turkey 77', and 'Chinese Spring' wheat. The alloploid was crossed (a) to common wheat, and (b) to the 'Imperial' rye to 'Chinese Spring' disomic addition lines. F2 progeny from these crosses were tested for Russian wheat aphid resistance and C-banded. Resistance was found to be associated with chromosome arm 1RS of the 'Turkey 77' rye genome. This initial work was done by MARAIS (1991) who made a RWA resistant, monotelosomic 1RS (

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21

Ehsan-Ul-Haq. "Interaction of cultural control with biological control of rose grain aphid, Metopolophium dirhodum (Walker) (Aphididae: Hemiptera) on wheat : the potential of glasshouse simulations." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387770.

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22

Zhang, Bo. "Evolutionary genetics and human assisted movement of a globally invasive pest (Russian wheat aphid : Diuraphis noxia)." Thesis, Queensland University of Technology, 2012. https://eprints.qut.edu.au/60959/1/Bo_Zhang_Thesis.pdf.

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This PhD study has examined the population genetics of the Russian wheat aphid (RWA, Diuraphis noxia), one of the world’s most invasive agricultural pests, throughout its native and introduced global range. Firstly, this study investigated the geographic distribution of genetic diversity within and among RWA populations in western China. Analysis of mitochondrial data from 18 sites provided evidence for the long-term existence and expansion of RWAs in western China. The results refute the hypothesis that RWA is an exotic species only present in China since 1975. The estimated date of RWA ex

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23

Sacranie, Sattar Farouk. "An investigation on the effect of Russian wheat aphid (Diuraphis noxia Kurdjumov) population growth and feeding damage on selected barley (Hordeum vulgare L.) cultivars under ambient and elevated CO2." Thesis, Rhodes University, 2016. http://hdl.handle.net/10962/50311.

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The Russian wheat aphid (RWA) (Diuraphis noxia Kurdjumov) is a major pest of cultivated small grains. It is particularly devastating because of is high reproductive rate which results in the growth of large populations which become damaging to its host plants. Development of resistant barley (Hordeum vulgare L.) cultivars is complicated as resistance is polygenic. As a result, the industry remains at risk now that the RWA has spread throughout South Africa. It has, as recently as, 2013, been identified in the SW Cape, which was previously geographically isolated. This is South Africa‟s princip

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24

Gange, Alan Christopher. "The ecology of the alder aphid "Pterocallis alni" (Degeer) and its role in integrated orchard pest management." Thesis, King's College London (University of London), 1985. https://kclpure.kcl.ac.uk/portal/en/theses/the-ecology-of-the-alder-aphid-pterocallis-alni-degeer-and-its-role-in-integrated-orchard-pest-management(20ddfb21-20f5-48d9-8e0e-db9d338a182b).html.

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The black-kneed capsid bug, Blepharidopterus angulatus(Fallen) is an important colonizer of orchards in late summer. Capsids develop on alder windbreaks feeding on the aphid Pterocallis alni(Degeer). When the aphid population declines adult bugs move to nearby orchards where they feed on pest species. The biology and ecology of P. alni has been examined in order that predator populations may be manipulated. Aphid populations increase rapidly to a peak, then suddenly decline. A high initial population results in a peak in mid July, low initial numbers result in a peak in early August. Pruning o

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25

Brown, Amanda Erica. "Variability in abundance of the rosy apple aphid (Dysaphis plantaginea), the role of its alternate host (Plantago major), and potential control strategies in organic apple orchards in British Columbia." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/3422.

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The rosy apple aphid, Dysaphis plantaginea, (Homoptera: Aphididae) is a serious pest of apples in British Columbia (BC), Canada and especially in organic orchards where conventional controls cannot be used. The goals of this study were to determine the environmental or management factors of an orchard that lead to high aphid populations, to conduct an economic assessment of the damage, to determine the timing of autumn migration, and to test several autumn and spring chemical control methods and two novel autumn mechanical control methods targeting the aphids while on their alternate host, Pl

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26

Christians, Gillian Eleanore. "Identification of molecular markers linked to woolly apple aphid (Eriosoma lanigerum) (Hausmann) resistance in apple." Thesis, Stellenbosch : Stellenbosch University, 2003. http://hdl.handle.net/10019.1/53454.

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Thesis (MSc)--Stellenbosch University, 2003.<br>ENGLISH ABSTRACT: Apple (Malus x domestica Borkh.) is an important horticultural crop worldwide and in the Western Cape. The income generated from apple and other deciduous fruit production amounts to approximately 25% of the gross total value of horticultural production in the Western Cape. Unfortunately diseases and pests adversely affect fruit production in this region. Woolly apple aphids (Eriosoma lanigerum L. (Hausmann» have a significant effect on the apple industry in the Western Cape. Damage caused is two-fold, occurring aerially a

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27

Palumbo, John C. "The Emergence of the Foxglove Aphid, Aulacorthum solani, as an Economic Pest of Lettuce in the Desert Southwest." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/214967.

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Several studies were conducted during the past two growing season to examine the population growth, distribution and damage potential of the foxglove aphid on head lettuce in the Yuma Valley. Light populations of foxglove aphids were first found colonizing untreated head lettuce in small experimental plots at the Yuma Agricultural Center in the spring of 2001. In the spring of 2002 foxglove aphids reached high population levels at YAC on spring plantings, but were not reported in commercial fields. This past spring foxglove aphid populations were wide-spread throughout the Yuma Valley, particu

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28

Njom, Henry Akum. "Mechanism and synchronicity of wheat (Triticum aestivum) resistance to leaf rust (Puccinia triticina) and Russian wheat aphid (Duiraphis noxia) SA1." Thesis, University of Fort Hare, 2016. http://hdl.handle.net/10353/2700.

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Wheat (Triticum aestivum and T. Durum) is an extremely important agronomic crop produced worldwide. Wheat consumption has doubled in the last 30 years with approximately 600 million tons consumed per annum. According to the International Maize and Wheat Improvement Center, worldwide wheat demand will increase over 40 percent by 2020, while land as well as resources available for the production will decrease significantly if the current trend prevails. The wheat industry is challenged with abiotic and biotic stressors that lead to reduction in crop yields. Increase knowledge of wheat’s biochemi

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29

Wessels, Willem Gerhardus. "Mapping genes for stem rust and Russian wheat aphid resistance in bread wheat (Triticum aestivum)." Thesis, Stellenbosch : Stellenbosch University, 1997. http://hdl.handle.net/10019.1/55580.

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Thesis ( MScAgric) -- Stellenbosch University, 1997.<br>ENGLISH ABSTRACT: Stem rust is considered the most damaging of the wheat rusts causing yield losses of more than 50% in epidemic years. Similarly, Russian wheat aphids (RWA) can be regarded as one ofthe most devastating insect pests of wheat. Yield losses due to R W A primarily result from a reduction in plant resources (sucking plant sap). Secondary losses are incurred by viruses transmitted during feeding. Mapping disease and insect resistance genes that are effective against prevailing pathotypes and biotypes of South Africa will

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30

Gianoli, Ernesto. "Induced responses of wheat to aphid feeding : consequences for both sides of the insect-plant interaction /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1998. http://epsilon.slu.se/avh/1999/91-576-5455-7.pdf.

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31

Hinga, Clark D. "Genetic analysis of resistance to Myzus persicae (Sulzer) in Nicotiana tabacum L." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/41552.

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<p>Field experiments with the green peach aphid on tobacco were conducted at Blackstone, Virginia in 1983 and 1984. The objectives were to: 1) confirm and identify source materials resistant to the green peach aphid; 2) study the inheritance of aphid resistance; 3) verify heritability of resistant genotypes through F2 and advanced generation testing and 4) investigate the nature of the resistance.</p> <p> Results showed green peach aphid resistance in Tobacco Introductions 1462, 1118, 1112, 1024, breeding line 1-35 and cultivar NC 745. Inheritance studies showed that the resistance is a recess

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32

Sotelo-Cardona, Paola Andrea. "Interactions among biological control, cultural control and barley resistance to the Russian wheat aphid, Diuraphis noxia (Kurdjumov), in Colorado, Kansas and Nebraska." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/6693.

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Doctor of Philosophy<br>Department of Entomology<br>C. Michael Smith<br>The Russian wheat aphid, Diuraphis noxia (Kurdjumov) (Hemiptera: Aphididae) (RWA), is an important pest in the U.S. Western Plains, causing hundreds of millions of dollars of losses to wheat and barley production through reduced yields and insecticide application costs. The objectives of this research were to evaluate the performance of two RWA-resistant barley varieties planted approximately one month earlier than normal in experimental fields at Fort Collins, Colorado; Tribune, Kansas; and Sidney, Nebraska during 2007, 2

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33

Heyns, I. C. "Mapping of chromosome arm 7DL of Triticum aestivum L." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/1584.

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Thesis (MSc (Genetics))--University of Stellenbosch, 2005.<br>The Russian wheat aphid, Diuraphis noxia (Mordvilko), is a serious insect pest of wheat and barley. It affects the quality and yield of grain by sucking plant sap from the newest growth whilst toxic substances are injected that destroy plant tissue. The Russian wheat aphid also acts as a vector of plant viruses. The cultivation of aphid resistant cultivars is the preferred control strategy and nine resistance genes, designated Dn1 to Dn9, have been identified. Another undesignated gene, Dnx, was found in the wheat accession PI2

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34

Peng, Zhongkui. "Feeding determinants in aphids with special reference to the Rose Aphid Macrosiphum rosae (L.)." Title page, table of contents and introduction only, 1991. http://web4.library.adelaide.edu.au/theses/09PH/09php398.pdf.

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Bibliography: leaves 170-189. This thesis looks at aphid feeding determinants by type and location. It examines the role of leaf surface chemicals in the discrimination of host plants and the deterrent effect of catechin and its oxidative condensation products.

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35

McVean, Ross Iolo Kester. "Forecasting pea aphid outbreaks." Thesis, University of East Anglia, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389386.

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36

Saheed, Sefiu Adekilekun. "Plant aphid interactions : effects of diuraphis noxia and rhopalosiphum padi on the structure and function of the transport systems of leaves of wheat and barley." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1003794.

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The infestation of the cultivated grain crops by phloem feeding aphids has generated a great deal of interest over the years, due to the serious damage they cause to the crops and yield losses that result. The mechanism of the interaction between aphids and host plants remains largely unknown in spite of efforts to understand the basis of aphid feeding on grain crops. Greater efforts are required to explain the mechanism(s) of this interaction in order to achieve sustainable agriculture. This thesis focused on an investigation of the mechanism of feeding by the Russian wheat aphid, Diuraphis n

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37

Stacey, David Andrew. "Insect pests in a changing climate." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271618.

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38

Kuklinski, Frank. "The cotton pests in Madagascar with special emphasis on the cotton aphid Aphis gossypii (Hom.: Aphididae) and its natural enemies /." [S.l. : s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=959594116.

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39

Kaakeh, Walid. "The effect of spirea aphid (Homoptera: aphididae) feeding and nitrogen fertilization on the growth of young apple trees, with comparisons to apple aphid." Diss., This resource online, 1989. http://scholar.lib.vt.edu/theses/available/etd-11072008-063502/.

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40

Jimoh, Mahboob Adekilekun. "Comparative study of the feeding damage caused by the South African biotypes of the Russian wheat aphid (Diuraphis noxia Kurdjumov) on resistant and non-resistant lines of barley (Hordeum vulgare L.)." Thesis, Rhodes University, 2011. http://hdl.handle.net/10962/d1003770.

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Cereal crop productivity is hampered when these plants are infested by phloem feeding aphids. A great deal of research has been carried out with the direct aim of a clearer understanding of the mechanism involved in the interaction between aphids and their host plants. Research has directly or indirectly been geared towards enhanced plant productivity and achieving sustainable agriculture. Barley (Hordeum vulgare L.) is an important small grain crop in South Africa, whose crop performance is negatively affected by fluctuations in weather patterns as well as by agricultural pests. One of the in

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41

Hartfield, Christopher Mark. "Biological control of aphids on plum." Thesis, Imperial College London, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287493.

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42

Kairo, Moses Thairu Kihiu. "Ecology and biocontrol of aphids feeding on cypress trees." Thesis, University of London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268028.

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43

Madhusudhan, Vaadiyar V. "Interaction of the spotted alfalfa aphid and its food plant." Title page, contents and summary only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phm1812.pdf.

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44

Day, Stephen John. "Dispersal of the apterae of the bird cherry-oat aphid from winter barley." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294949.

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45

Ponder, Katherine Louise. "Nitrogen and water stress in Barley : influences on the performance and feeding behaviour of the aphid Rhopalosiphum padi." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368315.

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46

Damavandian, M. R. "Biology of subterranean populations of woolly apple aphid, Eriosoma lanigerum (Hausmann)(Homoptera:Aphididae), in apple orchards." Thesis, Stellenbosch : Stellenbosch University, 2000. http://hdl.handle.net/10019.1/51638.

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Dissertation (PhD (Agric))--University of Stellenbosch, 2000.<br>ENGLISH ABSTRACT: A study was made of the basic biology of subterranean Eriosoma lanigerum (Hausmann) populations in apple orchards in the Western Cape Province of South Africa. The absence of cornicles and the presence of a vulva could be used to identify 1st instar nymphs and adults respectively. Body length, body width and length of the hind femur are useful for separating 2nd , 3rd and 4th instars. However, separation of 2nd from 3rd instar nymphs was very unreliable. Maximum population growth rate was at 23°C while

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47

Heunis, J. M. (Juanita Maria). "The biology and management of aerial populations of woolly apple aphid, Eriosoma lanigerum (Hausmann) (Homoptera: aphididae)." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52491.

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Dissertation (PhD)--University of Stellenbosch, 2001.<br>ENGLISH ABSTRACT: The basic biology of Eriosoma lanigerum (Hausmann) and its natural enemy, Aphelinus mali (Haldeman), was investigated in the Western Cape Province of South Africa. The first instar nymph can be identified by the absence of cornicles and the adult female by the presence of the vulva. Body length and distance between cornicles can be used to distinguish between the 2nd , 3rd and 4th instars. The development of E. lanigerum was negatively influenced by temperatures above 27DC. The net replacement rate (Ro) and int

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48

Matsiliza, Babalwa. "Effects of sustained Russian wheat aphid (Diuraphis noxia Mordvilko) feeding on leaf blades of wheat (Triticum aestivum L. cv Adamtas)." Thesis, Rhodes University, 2003. http://hdl.handle.net/10962/d1003782.

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Penetration of sink as well as source leaves of wheat plants by the Russian wheat aphid, Diuraphis noxia (Mordvilko) was investigated using light, fluorescence and transmission electron techniques, to determine the feeding strategies adopted by the aphid in penetrating and successfully feeding from the phloem, and to assess the structural effects of the probing and feeding behaviour of D. noxia on the feeding sites. Examination of aphid-infested sink, as well as source leaf tissue, showed that D.noxia probed in cells of the vascular bundle more frequently than mesophyll cells. Within the vascu

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49

Mundy, Ciaran Anthony. "Interactions between polyphagous Carabidae and surface active Collembola associated with arable ecosystems." Thesis, University of Hertfordshire, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245448.

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50

Gash, Alan Frederick Jones. "The influence of nitrogen fertiliser applications on the cereal aphids Metopolophium dirhodum and Sitobion avenae." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368789.

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