Dissertations / Theses on the topic 'Beetles'
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DeGomez, Tom, and Deborah Young. "Pine Bark Beetles." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2009. http://hdl.handle.net/10150/146729.
Full textDeGomez, Tom, and Deborah Young. "Pine Bark Beetles." College of Agriculture, University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/550373.
Full text4 pp.
Pine bark beetles in Arizona are generally of the genus Ips or Dendroctonus. Fading foliage in the tree is often the first sign of a beetle attack. Prevention is best practiced since control is not possible once the beetles have successfully colonized the tree. Colonization is dependent upon trees being in a vulnerable condition caused by stress from various agents and site conditions.
Schalau, Jeff. "Cypress Bark Beetles." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/144794.
Full textOther Forest Health Publications
Cypress bark beetles are native insects that often impact ornamental Arizona cypress and Leyland cypress trees. Healthy, vigorous cypress trees can usually withstand substantial beetle pressure. However, significant mortality of host tree species often occurs during periods of extended drought. Tree vigor can easily be maintained through deep, infrequent irrigation during drought periods.
Schalau, Jeff. "Cypress Bark Beetles." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/239598.
Full textEyres, M. D. "Aspects of the distribution of water beetles and ground beetles (Coleoptera)." Thesis, University of Newcastle Upon Tyne, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332348.
Full textCarrington, Terry R. "Factors influencing habitat selection and activity of ground beetles (Coleoptera: Carabidae) in central Appalachia Part I : The influence of soil and soil surface characteristics on habitat selection by Carabidae ; Part II : Precipitation and temperature fluctuations : effects on Carabidae activity ; Part III : The effects of two microbial insecticides for gypsy moth control on Carabidae populations /." Morgantown, W. Va. : [West Virginia University Libraries], 2002. http://etd.wvu.edu/templates/showETD.cfm?recnum=2368.
Full textTitle from document title page. Document formatted into pages; contains viii, 114 p. : ill., maps. Vita. Includes abstract. Includes bibliographical references.
Stribling, James B. "World generic revision of Ptilodactylidae (Coleoptera, dryopoidea) /." Connect to resource, 1986. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1273752066.
Full textFoley, Ian Andrew. "A review of the ironclad beetles of the world (Coleoptera Zopheridae: Phellopsini and Zopherini) /." Thesis, Montana State University, 2006. http://etd.lib.montana.edu/etd/2006/foley/FoleyI0806.pdf.
Full textJohnson, Shelley. "Pollen digestion in flower-feeding Scarabaeidae : protea beetles (Cetoniini) and monkey beetles (Hopliini)." Master's thesis, University of Cape Town, 2000. http://hdl.handle.net/11427/6106.
Full textBeetles pollinate over 80% of all flowering plants and feed on the two most common floral rewards, nectar and pollen. Pollen is nutritionally very valuable, being a rich protein and carbohydrate source. However, the hard and highly resistant outer wall (exine) of the grain is an obstacle that pollen-feeders must overcome in order to benefit from the pollen's nutritious protoplasm. There are a variety of mechanisms that pollen-feeders may use to deal with the exine. Collembolans secrete exinase that breaks down the wall, but other pollen-feeders do not produce this enzyme. Pollen-feeders that are unable to ingest grains may either pierce the grain and suck out the contents (thrips and biting-flies) or cause the grain contents to leach out an imbibe the leachate (butterflies and the eucalupt nectar fly). Pollen-feeders that can ingest the grains (bees, syrphid flies, rodents, marsupials, bats and birds) may use osmotic shock, pseudo-germination, exudation, microbial digestion or enzyme penetration to gain access to the protoplasmic contents. Further study is needed to define the details of these methods and whether they are all in use.
Warner, Douglas James. "The potential of carabidae in the control of insect pests of winter oilseed rape." Thesis, University of Hertfordshire, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366035.
Full textObeng-Ofori, Daniels. "Monitoring of stored product beetles." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317834.
Full textBlake, Max. "Conservation genetics of saproxylic beetles." Thesis, Aberystwyth University, 2017. http://hdl.handle.net/2160/cfdb958e-da35-463c-b65c-37fb9a4febdc.
Full textRoslin, Tomas. "Spatial ecology of dung beetles." Helsinki : University of Helsinki, 1999. http://ethesis.helsinki.fi/julkaisut/mat/ekolo/vk/roslin/.
Full textBotes, Antoinette. "Heterogeneity of dung beetle (Coleoptera: Scarabaeidae) assemblages in northern KwaZulu-Natal, South Africa : conservation implications." Pretoria: [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-11212005-111029.
Full textOber, Karen Ann. "The evolution of arboreal carabid beetles." Diss., The University of Arizona, 2001. http://hdl.handle.net/10150/289746.
Full textArndt, Eric Michael. "How beetles explode : new insights into the operation, structure, and materials of bombardier beetle (Brachinini) defensive glands." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98639.
Full textCataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 97-105).
Bombardier beetles possess one of the most remarkable defense mechanisms in nature, using explosions inside their bodies to synthesize and eject a hot, noxious spray at attackers. The chemical reactions that enable this process are well understood, but many aspects of the beetles' two-chambered defensive glands, which house the explosions and produce the defensive spray, remain unexplored. In this Thesis, I describe our recent progress in understanding the operation, structure, and materials composition of the defensive glands-topics which have to date received little treatment in the literature-of the best-known bombardier beetles, the brachinines (Carabidae: Brachininae: Brachinini). Chapter 2 deals with the pulsed-jet character of brachinines' sprays, which is in contrast to all other types of bombardier beetles that emit their sprays as continuous streams. Brachinine sprays comprise a number of spray pulses emitted in a rapid sequence, each pulse formed in a discrete explosion event inside the reaction chamber of the defensive gland, with the frequency of pulsation ranging from 300 to 1000 Hz. Using a combination of high-speed synchrotron x-ray phase-contrast imaging of live beetles, anatomical studies of the excised defensive glands, and mathematical analyses, we determined that spray pulsation arises due to explosion-induced displacement of the inlet structures to the reaction chamber periodically cutting o the ow of reactant solution into the reaction chamber. In Chapter 3, the interior cuticular microsculpture of the reaction chamber is studied using scanning electron microscopy and synchrotron x-ray phase-contrast microtomography. The microscupture is found to be highly complex, with a number of distinct spiny microtextures localized to specific regions of the reaction chamber. Quantitative details of the spine lengths and spacings are reported, and on the basis of the similarity of some of the features to the beetles' external abdominal microscupture and the micro-textural transitions observed inside the reaction chamber, we hypothesize that the reaction chamber microsculpture is homologous with the exterior microsculpture, consistent with the fact that the defensive glands are invaginations of the abdomen. Chapter 4 reports our preliminary investigations of the materials composition of the defensive glands. We use scanning electron microscopy to examine the fibrous composite structure of the gland cuticle and employ various light microscopy techniques to understand spatial variations in the cuticle sclerotization and chemical composition. The reaction chamber is found to exhibit dramatic spatial variation in sclerotization, including several lightly sclerotized regions, and possible functions of these regions are proposed. Additionally, the inter-chamber valve is found to contain the rubber-like protein resilin, likely as an adaptation to allow the valve to consistently make and hold a tight seal during each explosion, in analogy to rubber gaskets used in technological valve applications.
by Eric Michael Arndt.
Ph. D.
Bouchard, Patrice. "Systematics and biogeography of the Australian wet tropics coelometopini (Coleoptera: Tenebrionidae: Coelometopinae) /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16090.pdf.
Full textGreenwood, Matthew E. "Co-baiting for spruce beetles, Dendroctonus rufipennis, Kirby, and western balsam bark beetles, Dryocoetes confusus Swaine, Coleoptera, scolytidae." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ37539.pdf.
Full textLiljestrand, Rönn Johanna. "Male-female Coevolution in Bruchid Seed Beetles." Doctoral thesis, Uppsala universitet, Zooekologi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-98162.
Full textBelaoussoff, Svenja. "Carabid beetles as indicators of tillage disturbance." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0023/NQ51029.pdf.
Full textMate, Nankervis Jason Fernando. "Radiation and diversification of aphodius dung beetles." Thesis, Imperial College London, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.402578.
Full textWilson, Christine Jane. "Chromosomal studies on dung beetles (Coceoptera: Scarabaeoidea)." Thesis, Royal Holloway, University of London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271713.
Full textLeavengood, John Moeller. "The checkered beetles (Coleoptera: Cleridae) of Florida." [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0023794.
Full textDeGomez, Tom, and Beverly Loomis. "Firewood and Bark Beetles in the Southwest." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/146723.
Full textPine Bark Beetles, Cypress Bark Beetles
Life cycle of the bark beetles and how to detect in firewood. Source of firewood is important. Dry wood is a poor host for bark beetles. Most bark beetles are host specific. Insecticides should not be applied to firewood to prevent bark beetle infestation.
DeGomez, Tom, and Beverly Loomis. "Firewood and Bark Beetles in the Southwest." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/239575.
Full textTrillo, Paula Alejandra. "Pre- and post-copulatory sexual selection in the tortoise beetle Acromis Sparsa (Coleoptera Chrysomelidae)." [Missoula, Mont.] : The University of Montana, 2008. http://etd.lib.umt.edu/theses/available/etd-03212009-144120/unrestricted/Trillo_umt_0136D_10003.pdf.
Full textMidgley, John Mark. "Aspects of the thermal ecology of six species of carcass beetles in South Africa." Thesis, Rhodes University, 2008. http://hdl.handle.net/10962/d1005325.
Full textVessby, Karolina. "Distribution and reproduction of dung beetles in a varying environment : implications for conservation of semi-natural grasslands /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-5823-4.pdf.
Full textBailey-Jourdain, Catherine. "Male age effects, cytoplasmic incompatibility and the localization of Wolbachia in Chelymorpha alternans Boh (Chrysomelidae, Cassidinae)." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=100760.
Full textLott, Derek Arthur. "The semi-aquatic habitats of terrestrial Coleoptera in a lowland river floodplain." Thesis, University of Newcastle upon Tyne, 1999. http://hdl.handle.net/10443/3632.
Full textHopp, Katie Jo. "A revision of the West Indian genus Nesocyrtosoma (Coleoptera: Tenebrionidae)." Thesis, Montana State University, 2008. http://etd.lib.montana.edu/etd/2008/hopp/HoppK1208.pdf.
Full textFadamiro, Henry Yemisi. "Flight behaviour and pheromone communication of the larger grain borer, Prostephanus truncatus (Horn) (Coleoptera: Bostrichidae)." Thesis, University of Oxford, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.296831.
Full textRugman-Jones, Paul F. "Mechanisms and consequences of post-copulatory sexual selection in the Bruchidae." Thesis, University of Sunderland, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269163.
Full textEady, Paul E. "Sperm competition in Callosobruchus maculatus." Thesis, University of Sheffield, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263760.
Full textWhitlow, Sonia. "Recognition in burying beetles (Nicrophorus spp., Silphidae, Coleoptera)." [S.l.] : [s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=972110240.
Full textLepping, Miles David. "Ground-dwelling beetles as bioindicators in transgenic corn." College Park, Md.: University of Maryland, 2009. http://hdl.handle.net/1903/10073.
Full textThesis research directed by: Dept. of Entomology. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Hewson, Nicola. "Conservation biology of rare leaf beetles (Coleoptera: Chrysomelidae)." Thesis, University of Leeds, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432389.
Full textDennis, Peter. "The predatory potential of staphylinid beetles in cereals." Thesis, University of Southampton, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.328729.
Full textPapadopoulou, Anna. "Phylogeography of Tenebrionid beetles in the Aegean archipelago." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/5504.
Full textSeeman, Owen. "Mites and passalide beetles : diversity, taxonomy, and biogeography /." St. Lucia, Qld, 2002. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16522.pdf.
Full textBURNE, JEFFREY CAMERON. "A MORPHOMETRIC ANALYSIS OF MORDELLISTENA IN THE SOUTHWESTERN UNITED STATES (COLEOPTERA: MORDELLIDAE)." Diss., The University of Arizona, 1985. http://hdl.handle.net/10150/188064.
Full textDury, Guillaume. "Evolution of cycloalexy in neotropical Chrysomeline beetles (Coleoptera: Chrysomelidae)." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119668.
Full textLes larves de certains insectes forment un cercle serré et ordonné au repos, un comportement appelé « cycloalexie » pour la première fois par Vasconcellos-Neto et Jolivet) (1988b). Le mot a été défini par Jolivet et collaborateurs en 1990 comme étant un comportement défensif de larves d'insectes qui forment un cercle serré, avec l'extrémité la mieux défendue à la périphérie. soit leurs têtes ou leurs abdomens. La formation est aussi associée à des mouvements coordonnés du groupe pour repousser les menaces. Le terme a progressivement gagné en acceptation et s'est élargi pour inclure des nymphes d'insectes, des insectes adultes et même des vertébrés. Nous faisons la revue des rapports de cycloalexie et trouvons que le comportement est moins rependu que suggéré. Les exemples convaincants ne se retrouvent que chez les mouches à scie, les chrysomèles, les chenilles, une espèce de charançon et une de moucheron. Nous questionnons les rapports de cycloalexie chez les manchots, un crustacé amphipode, des nymphes d'hémiptères et des larves d'hyménoptères et de névroptères. Nous suggérons que les comportements analogues chez les mammifères sont réactifs plutôt que préventifs, et donc pas cycloalexiques. Une phylogénie moléculaire a été reconstruite pour évaluer les relations de 70 espèces de Chrysomelinae néotropicales et l'évolution de la cycloalexie. Nous avons séquencé des segments de cinq gènes : les gènes nucléaires CAD codant et 28S ribosomal, et les gènes mitochondriaux 12S ribosomal et COI et COII codants. La phylogénie a été inférée en utilisant des méthodes bayésienne et de Maximum de Vraisemblance (MV), le comportement ancestral des larves a été reconstruit à l'aide de méthodes de MV et de Maximum de Parcimonie. La reconstruction du comportement ancestral montre cinq origines évolutives indépendantes du grégarisme des larves chez les chrysomèles Néotropicales, deux avec soins maternels et regroupement circulaire des larves et une accompagnée de cycloalexie. De plus, notre phylogénie clarifie les relations à l'intérieur des Chrysomelinae, et montre qu'une révision est nécessaire : Stilodes est paraphylétique avec Zygogramma, Platyphora est polyphylétique et divisé en deux clades; l'un avec Doryphora imbriqué dedans et l'autre avec Proseicela.
Kowles, Katelyn A. "Dynamics of aggregation formation in Japanese beetles, Popillia japonica /." View online, 2009. http://repository.eiu.edu/theses/docs/32211131559299.pdf.
Full textSchofield, James. "Real-time acoustic identification of invasive wood-boring beetles." Thesis, University of York, 2011. http://etheses.whiterose.ac.uk/1978/.
Full textGuevara, Roger. "Interactive dynamics between wood-rotting fungi and ciid beetles." Thesis, University of Bath, 1998. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.299683.
Full textMomcilovich, Ashlee Nichole. "The Evolutionary Significance of Body Size in Burying Beetles." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/7327.
Full textBaig, Farrukh. "Chemical ecology of Carpophilus beetles and their yeast symbionts." Thesis, Queensland University of Technology, 2020. https://eprints.qut.edu.au/202961/1/Farrukh_Baig_Thesis.pdf.
Full textChasez, Heather R. "The effects of age on reproduction in a citrus root weevil Diaprepes abbreviatus." Master's thesis, University of Central Florida, 2011. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4868.
Full textID: 029809511; System requirements: World Wide Web browser and PDF reader.; Mode of access: World Wide Web.; Thesis (M.S.)--University of Central Florida, 2011.; Includes bibliographical references (p. 23-28).
M.S.
Masters
Biology
Sciences
Hale, Lisa A. "Testing the effects of water current velocity on zinc toxicity to Psephenus herricki a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=0&did=2000385051&SrchMode=1&sid=2&Fmt=6&VInst=PROD&VType=PQD&RQT=309&VName=PQD&TS=1279284362&clientId=28564.
Full textJanse, van Rensburg Lindie. "A morphological analysis of weevils from sub-Antarctic Prince Edward Islands an assessment of ecological influences /." Pretoria : Db [s.n.], 2005. http://upetd.up.ac.za/thesis/available/etd-08242006-125130.
Full text