Relevant bibliographies by topics / Of Entomology / Dissertations / Theses
To see the other types of publications on this topic, follow the link: Of Entomology.

Dissertations / Theses on the topic 'Of Entomology'

Author: Grafiati
Published: 4 June 2021
Last updated: 16 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Of Entomology.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Villet, Martin Herrer. "“The Two Cultures reunited: entomology for everyone”." Rhodes University, 2009. http://hdl.handle.net/10962/d1018947.

Full text
Abstract:
Fifty years ago C.P. Snow delivered his essay, "The Two Cultures", sparking the schism between the Humanities and the Sciences. This lecture explores cultural entomology as a means of reconciling two other cultures: academia and society, and suggests one way of addressing this alienating dilemma.
APA, Harvard, Vancouver, ISO, and other styles
2

Johnson, Jennifer Lisa. "Evolution: A Museum of Entomology for Roosevelt Island." Thesis, Virginia Tech, 2004. http://hdl.handle.net/10919/34323.

Full text
Abstract:
Buildings have identities. Like people, they have an essence that people can appreciate whether or not they can consciously evaluate that impression. Buildings can have personality and character. They can be amiable, reserved, even abrasive; we can enjoy or detest being in them. How does design imbue this character? Sometimes a building's identity is so sympathetic towards a program that the original use is apparent even after a change of use. Is this solely the result of conscious alteration, or can the original architect assist this constancy by so thoroughly infusing character into the design that, short of demolition, a semblance of identity will always be retained? Buildings have identities which can be enhanced or repressed through renovation. But can a building inform? Can a building be a devise for spreading information? What essential characteristics are necessary for identification? Would a building, possessing the characteristics of another object, be identifiable as that thing? Can a building be an insect?
Master of Architecture
APA, Harvard, Vancouver, ISO, and other styles
3

Desmeules, Mélanie. "La contribution entomologique et taxinomique de l'abbé Léon Provancher /." Thèse, Chicoutimi : Université du Québec à Chicoutimi, 2003. http://theses.uqac.ca.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Scaglia, Jorge Alejandro Paulete. "Verificação e especificação da fauna entomologica presente no processo tanatologico." [s.n.], 2006. http://repositorio.unicamp.br/jspui/handle/REPOSIP/290713.

Full text
Abstract:
Orientador: Eduardo Daruge
Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Odontologia de Piracicaba
Made available in DSpace on 2018-08-10T16:59:37Z (GMT). No. of bitstreams: 1 Scaglia_JorgeAlejandroPaulete_M.pdf: 3759817 bytes, checksum: c24d4be1f820d68f596b05dcaac0a60f (MD5) Previous issue date: 2006
Resumo: A aplicação do estudo dos insetos, ácaros e outros artrópodes, a assuntos legais, é denominada de Entomologia Forense. A entomologia forense se aplica a inúmeras situações do cotidiano, que vão desde um simples caruncho em um saco de milho de pipoca, passam pelas traças devastando coleções de livros, que por sua vez se aliam às baratas e findam com os cupins destruindo documentos e antiguidades. Sem se falar, ainda, no seu uso em relação a produtos armazenados, grãos estocados, na lavoura; enfim, em todo e qualquer lugar, em que o dano ou a aparição de um inseto seja motivo de prejuízo, direto ou indireto, ou que, de certa maneira possa ser comprovadamente o nexo causal. Também se deve destacar, uma das mais importantes aplicações atuais da entomologia, através da qual determina-se o tempo de morte de um cadáver, independente de seu estado de decomposição. Nesse caso, os insetos (ou outros artrópodes) relacionados com um cadáver ou parte dele, atuam como indicador de tempo de morte (PMI). Nesse contexto, o presente trabalho de pesquisa teve por objetivo verificar quais são os insetos mais encontrados nos cadáveres, determinar em que fase da decomposição cadavérica os mesmos ocorrem, bem como analisar a viabilidade de uso dos mesmos para a determinação do tempo decorrido da morte. Para a investigação desse fato biológico, no presente trabalho foram utilizadas amostras coletadas sobre 200 cadáveres em diferentes estados de decomposição, que passaram pelo Instituto Médico Legal de Cuiabá, Estado do Mato Grosso, com causas da morte ¿não naturais¿. Para a inclusão dos cadáveres neste trabalho, não houve necessidade de se adotar quaisquer critérios específicos quanto à idade, sexo, altura, cor ou outro morfológico, visto que estes não influenciariam nos resul tados da pesquisa. As amostras consistem em ovos, estágios imaturos e adultos de diversos insetos. Para a análise das amostras em questão, utilizaram-se as tabelas de bioritmicidade e as técnicas do Grau- Hora-Acumulada (ADH). Todo material foi cuidadosamente coletado e processado no Laboratório de Odontolo-gia Legal da Faculdade de Odontologia de Pi racicaba - UNICAMP, bem como analisado tanto nos seus aspectos qual itativo quanto quantitativo, o que permitiu evidenciar as conclusões pretendidas. Atingido o seu termo, este trabalho de pesquisa científica permitiu concluir, através da metodologia empregada que, através da sucessão entomológica, é possível determinar em que fase a decomposição cadavérica se encontra, permitindo assim, determinar o tempo decorrido da morte
Abstract: The application of the study of the insects, acarids and other arthropods, to legal subjects, is denominated of Forensic Entomology. The forensic entomology is applies itself to countless situations of the daily life, since a simple little beetle in a sack of popcorn, they go by the moths desolating collections of books, that form an alliance with the cockroaches and join the termites destroying documents and antiquities for its time. Not to mention, therefore, its use in relation to stored products and grains, in the crop. Finally, in whole and any place, in which the damage or the appearance of an insect is reason for a damage, direct or indirect, or that, in a certain way can be really the causal connection. It should also highlight one of the most important current applications of the entomology, through which the time of death of a cadaver is determined, independent of its decomposition. In that case, the insects (or other arthropods) related to a cadaver or the leaves of it act as an indicator of the time of the death (PMI). In that context, the present research work has had for objective to verify which insects are mostly found in the cadavers, to determine in which phase of the cadaverous decomposition the same ones happen as wel l as to analyze the viabi lity of using of the same ones for the determining of the elapsed time of the death. For the investigation of that biological fact, in the present work samples collected on 200 cadavers in different decomposition phases, that have passed by the Legal Medical Institute of Cuiabá, State of Mato Grosso were used. To include the corpse in this work, there were not any necessities of criteria like age, sex, high, color or other morphological evidence, because this one does not chance the results of the research. The samples consist of eggs, immature and adult apprenticeships of several insects. All material was collected carefully and processed in the Laboratory of Legal Dentistry of the Ability of Dentistry of Piracicaba¿UNICAMP, as well as analyzed not only in its qualitative but also in its quantitative aspects, what has allowed evidencing the intended conclusions. Reached its term, this work of scientific research has allowed ending, through the methodology used that, through the entomological succession, it is possible to determine in which phase the cadaverous decomposition is, allowing this way, to determine the elapsed time of the death
Mestrado
Mestre em Odontologia Legal e Deontologia
APA, Harvard, Vancouver, ISO, and other styles
5

Wells, Brenda L. "ECOLOGICAL SPECIATION IN A MULTI-TROPHIC COMPLEX: GALL MIDGES, GOLDENRODS, AND PARASITOIDS." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1290387561.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Arnaldos, Sanabria María Isabel. "Estudio de la fauna sarcosaprófaga de la región de Murcia. Su aplicación a la Medicina Legal." Doctoral thesis, Universidad de Murcia, 2000. http://hdl.handle.net/10803/94514.

Full text
Abstract:
El estudio de la comunidad entomosarcosaprófaga reviste interés tanto por el conocimiento zoológico en sí mismo, como por su aplicación en la práctica medicolegal. En la península Ibérica los estudios sobre esta comunidad son muy escasos, siendo necesario el uso de datos procedentes de áreas biogeográficas diferentes, cuestión no deseable que resta fiabilidad a las conclusiones obtenidas. Por tanto, para prevenir el uso de datos foráneos, se hace necesario el conocimiento de las faunas locales y sus diferentes hábitats Para el estudio de la fauna sarcosaprófaga de la región de Murcia se utilizó una Trampa de Schoenly modificada cebada con carcasas de pollo parcialmente descarnadas con las vísceras en su interior. La trampa se situó en Campo de Experiencias Agrícolas y Forestales de la Universidad de Murcia, como lugar representativo de hábitat árido semiurbano. Se realizaron 4 muestreos correspondientes con las cuatro estaciones anuales. En el presente estudio se exponen los datos de la fauna entomosarcosaprófaga. Se capturaron 208 taxones diferentes, pertenecientes a 18 órdenes de Chaelicerata, Crustacea, Myriapoda e Insecta. Se muestran además los datos de cada uno de los taxones capturados en relación con la fase de la descomposición y la estación de muestreo, caracterizando las especies mejores indicadores y estudiando su importancia en la práctica medicolegal.
The study of entomosarcosaprophagous community has interest in two aspects: the zoological knowledge itself and its utility in medico-legal practice. The knowledge of local fauna and its different habitats could provide a useful data base for forensic investigation. It will be very interesting to prevent the use of data from different biogeographical area with a different faunistic composition and environmental characteristics. To study the sacrcosaprophagous community a modified version of the trap designed by Schoenly was used. The trap was site in the Agricultural and Forestal Experimental field station of the University of Murcia. This site is representative of seminatural place and arid environment. The four series of carried out corresponded to the four season of the year. The trap was baited with chicken carcasses with the flesh partially removed and the viscera inside. We present the entomological fauna captured in relation to sarcosaprophagous fauna in this semiarid environment. We capture 208 different taxa. They are included in 18 orders of Chaelicerata, Crustacea, Myriapoda and Insecta. We present the data of every taxa captured concerning the season and decomposition stage, in addition we present the most indicative species and its importance in medicolegal practice.
APA, Harvard, Vancouver, ISO, and other styles
7

Silow, Carl Axel. "Edible and other insects of mid-western Zambia studies in ethno-entomology /." Uppsala : Institutionen för allmän och jämförande etnografi vid Uppsala universitet, 2021. http://catalog.hathitrust.org/api/volumes/oclc/2440377.html.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Xue, Meng. "Development, relative retention, and oviposition of the red flour beetle, Tribolium castaneum (herbst), on different starches." Thesis, Kansas State University, 2010. http://hdl.handle.net/2097/7055.

Full text
Abstract:
Master of Science
Department of Grain Science and Industry
Subramanyam Bhadriraju
The development, relative retention, and oviposition of the red flour beetle, Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), on six different types of starches, wheat flour, and wheat flour plus yeast were investigated in the laboratory. The particle size of starch and flours were different; the mean size of 90% of particles for starches ranged from 15 μm for high amylose corn starch to 58 μm for potato, whereas that of the flour was ≤ 133 μm. Larval length, head capsule width, and weight gain of T. castaneum larvae were measured every 3 d on starches, flour, and flour plus 5% (by wt) yeast diet for 30 d at 28oC, 65% r.h., and 14:10 (L:D) photoperiod. Larvae reared on flour and flour plus yeast developed normally and showed better survival compared to those reared on starches. Larvae on the starches failed to develop beyond second, and rarely, third instars. Adults of T. castaneum did not show any preference to flour over starches in dual-choice tests in circular arenas. On average, T. castaneum laid less than 3 eggs/female over a 15-d period on starches compared to 97 and 109 eggs/female on flour and flour plus yeast diet, respectively. These studies suggest that starches are poor substrates for larval survival and development. Starches were as attractive as flour to adults; however, starches do not appear to be a suitable medium for egg-laying. Both aggregation pheromone and volatiles did not trigger oviposition behavior. Experiments by moving adults between wheat starch and wheat flour and vice versa showed that feeding on wheat flour was necessary for egg-laying, indicating the absence of essential nutrients in wheat starch. On wheat flour, feeding for 0.5 d was necessary to lay eggs. Females that were starved failed to lay eggs, reinforcing that the nutrional status of females and not males was essential for egg-laying. A minimum of 4% of wheat gluten (wheat protein) elicited egg-laying on starches, although 4-5 times fewer eggs were laid in starch gluten compared with wheat flour alone. Supplementing wheat starch with 1% cholesterol, in addition, to gluten, did not result in an increase in egg-laying by T. castaneum females. These findings suggest that starches may have potential in managing development and reproduction of T. castaneum—a pest that is common and severe in food-processing facilities. Furthermore, starches can be used as a suitable substrate for studying the nutritional ecology of T. castaneum.
APA, Harvard, Vancouver, ISO, and other styles
9

McDiarmid, Clark John F. "Science, secularization and social change : the metamorphosis of entomology in nineteenth-century England." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260032.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Blevins, Stephanie Lynn. "Comparing University Entomology Outreach Events While Examining Public Views of Arthropods and Pesticides." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/85361.

Full text
Abstract:
Hokie BugFest is an annual free event designed by the Entomology Department at Virginia Tech to translate the importance of entomology to the public. The event has grown from 2,000 attendees in 2011 to over 8,000 attendees in 2017. Entomology faculty, staff, graduate students and alumni partner with Virginia Cooperative Extension, Virginia 4-H, and other entities to provide an educational experience to the public. The goal of this outreach event is to showcase entomological research, increase public awareness, elevate the appreciation of entomology, develop better public perceptions of insects and other arthropods, and educate participants about pesticide safety and pest management practices. Although many institutions host entomology outreach events like Hokie BugFest (Frazier, 2002; Hamm and Rayor, 2007; Hvenegaard et al., 2013), little research has been conducted to compare the impact of these activities. Whether these events impact public attitudes toward insects and other arthropods is also lacking (Pitt and Shockley, 2014). Several studies have been conducted in other states to investigate public attitudes toward arthropods and pesticides (Baldwin et al., 2008; Byrne et al., 1984; Frankie and Levenson, 1978; Hahn and Ascerno, 1991; Potter and Bessin, 1998); however, research is missing in Virginia. In order to contribute to this literature, three surveys were developed. One survey focused on investigating entomology outreach events similar to Hokie BugFest. Results revealed that event structure, attendance, funding sources, and popular exhibits impact the hosting institution and the surrounding communities. The other two surveys focused on gauging the impacts Hokie BugFest has on youth and adult attendees. Results indicated the event has a positive impact on attendee perceptions of insects, other arthropods, and pesticides.
Master of Science in Life Sciences
APA, Harvard, Vancouver, ISO, and other styles
11

Giudici, Michelle Catherine. "The Phenology of the Apple Maggot Fly, Rhagoletis pomonella (Diptera: Tephritidae), in the Southern Appalachians." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-03162006-082548/.

Full text
Abstract:
In contrast to many apple production areas, the phenology of the apple maggot, Rhagoletis pomonella (Walsh), is not well understood in North Carolina and other areas of the Southern Appalachian Mountains. Studies in western North Carolina in the 1970?s reported a single flight period that occurred from mid-June to mid-September, with peak fight activity occurring in late July. More recent monitoring in Henderson County, NC, showed evidence of a bimodal emergence, with the first emergence occurring in late May to early June, and the second from mid July through August. It was not clear if this represented a bimodal emergence pattern or completion of two generations. The objectives of this study were to gain a better understanding of the phenology of the apple maggot in apple-producing regions of the Southern Appalachian Mountains, to examine the post-diapause development requirements among early and late-emerging populations in North Carolina, and to determine if phenologically and geographically distinct apple maggot populations could be differentiated genetically using the COI gene of mitochondrial DNA. Apple maggot flight was monitored in abandoned apple orchards in western North Carolina and South Carolina that represented a diversity of elevations. A distinct bimodal flight pattern was observed at all locations. A second generation was also observed at lower elevations (300-330 m) in Polk County, NC, and Spartanburg County, SC. Only one generation was evident at higher elevations (>600 m) in North Carolina. Among early and late-emerging groups, the post-diapause developmental period was shorter in the early emerging groups compared to late-emerging groups. Based on sequences of the mitochondrial gene COI, no significant differences were found between early or late-emerging groups. Furthermore, analysis of the COI gene did not detect geographic isolation among populations from North Carolina, South Carolina, Massachusetts, and West Virginia, or among populations in Henderson, Polk, and McDowell Counties in North Carolina. Blueberry maggot, Rhagoletis mendax Currans, from New Jersey did not differ at the COI gene from apple maggot populations in North Carolina and South Carolina, and were most closely related to the Upward Road location in Henderson County.
APA, Harvard, Vancouver, ISO, and other styles
12

Kimps, Nicholas Wade. "First Report of the Repellency of 2-Tridecanone in Ticks." NCSU, 2010. http://www.lib.ncsu.edu/theses/available/etd-03232010-143728/.

Full text
Abstract:
The chemicals 2-tridecanone and 2-undecanone are both found naturally in the trichomes of wild tomato plants and are important in plant resistance to herbivory. 2-Undecanone recently was shown to be an effective tick repellent and is the active ingredient in the commercially available arthropod repellent, BioUD®®. The goal of this study was to examine, for the first time the, tick repellency of 2-tridecanone. Two-choice bioassays were conducted between 8% 2-tridecanone versus the repellent carrier, absolute ethanol and compared to similar choice studies with 8% 2-undecanone versus absolute ethanol. Unfed, host-seeking adult (mixed sexes) Amblyomma americanum and Dermacentor variabilis were used to evaluate repellency and time to repellent failure at room temperature on two different substrates. In filter paper assays, 2-Tridecanone was >70% repellent to A. americanum and D. variabilis for 12 and 15 h, respectively. In contrast, 2-undecanone was >70% repellent to A. americanum and D. variabilis for only 2 h. In two choice assays on cheesecloth, 2-tridecanone was 85% repellent to A. americanum for 6 h. 2-tridecanone provided repellency significantly longer than 2-undecanone. The potential use of 2-tridecanone as a tick repellent is discussed.
APA, Harvard, Vancouver, ISO, and other styles
13

Blinka, Kate Whitley. "RESIN FLOW IN CLONAL LOBLOLLY PINE." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-04232007-082818/.

Full text
Abstract:
Loblolly pines, Pinus taeda L., are a vital part of the timber industry throughout the southern United States and are susceptible to damage and mortality as a result of attack by southern pine beetles, Dendroctonus frontalis Zimmerman. The primary defense of loblolly pines against bark beetles is constitutive resin, which provides a physical barrier to beetle colonization. A study has been conducted to determine resin production heritablity in clonal loblolly pines. Samples were taken in the spring and late summer of 2005 and 2006 in Milton, FL and Walterboro, SC. Each site included nine complete random blocks containing improved and unimproved checks and 115 and 149 sampled clones, respectively. Two resin samples were collected at breast height from each tree after resin was allowed to flow for 22 +/- 2 hours. Samples were then dried until a subset reached constant mass and sample mass data were used to determine total resin flow repeatability. Total resin flow was found to be significantly higher in one family than the improved check. Resin production by clonal loblolly pines was found to have moderately high repeatability and low positive correlation with tree volume. Results indicate that clone selection that includes resin production as well as desirable growth characteristics can result in loblolly pines that display decreased susceptibility to the southern pine beetle.
APA, Harvard, Vancouver, ISO, and other styles
14

Kovanci, Orkun B. "Mating disruption for control of the Oriental fruit moth, Grapholita molesta (Busck) (Lepidoptera:Tortricidae), in North Carolina apple orchards." NCSU, 2003. http://www.lib.ncsu.edu/theses/available/etd-07242003-225802/.

Full text
Abstract:
Oriental fruit moth, Grapholita molesta (Busck), has been a primary pest of peaches for many years throughout the world, and recently it has also emerged as a key pest of apples in the eastern United States. The implementation of the Food Quality Protection Act has eliminated the use of many organophosphate insecticides and encouraged the search for alternatives to organophosphates for control of Oriental fruit moth. Large and small plot studies were conducted to evaluate mating disruption as an alternative control tactic against Oriental fruit moth in North Carolina apple orchards during 2000-2002. The efficacy of Isomate-M 100 pheromone dispensers and microencapsulated sprayable pheromone was compared to insecticide-treated and non-managed orchards. Pheromone trap catches were significantly reduced in mating disruption blocks compared with conventional and non-managed orchards. Pheromone traps placed in the upper canopy captured significantly more moths than traps placed in the lower canopy across all treatments. Male OFM responded optimally to traps baited with 100 µg lures compared with 30 and 300 µg lures regardless of treatment. The loss of OFM pheromone from red rubber septa over a four-wk period exhibited a first-order release rate for septa loaded with 100 and 300 µg pheromone, but a more constant release rate from septa loaded with 30 µg pheromone. Based on pheromone trap captures, there was little difference among rates of sprayable pheromone ranging from 12.4 to 49.1 g (ai)/ha, but efficacy declined at 2.4 g (ai)/ha applied at monthly intervals. The 6.2 g (ai)/ha rate applied at 2-wk intervals was significantly less effective than monthly applications of 12.4 and 24.7 g (ai)/ha. Significantly fewer moths were caught in pheromone traps deployed in blocks treated in late May with Isomate-M 100, Isomate-M Rosso and Isomate-M 100 plus 3M sprayable pheromone compared with traps in conventional insecticide treatments, and Isomate-M 100 applied in late June. Overall, fruit damage by OFM larvae was quite low in mating disruption blocks.
APA, Harvard, Vancouver, ISO, and other styles
15

Powell, Bradford E. "Interactions between the ants Linepithema humile, Tapinoma sessile and aphid mutualists." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-11012008-082656/.

Full text
Abstract:
Invasive species have major impacts on the ecosystems they invade. Among the most disruptive groups of invasive species are ants. Invasive ants have caused losses in biodiversity among a wide range of taxa, including birds, mammals, lizards, but especially towards ground nesting arthropods such as native ants. Why native ants are so susceptible to invasion and how invasive ants are able to sustain massive population growth remain unclear. It has been suggested that invasive ants utilize carbohydrate resources from hemipteran exudates to fuel aggressive foraging and colony expansion. Perhaps invasive ants are simply more proficient at usurping these resources, maintaining higher hemipteran populations, etc. Our work uses a model invasive, the Argentine ant, , Linepithema humile, and a native ant Tapinoma sessile to quantify hemipteran tending ability and competition. Through a series of laboratory and field experiments we were able to quantify 1) carbohydrate sequestering performance, 2) the effect either ant species had on hemipteran population growth rates in a predator-free space, 3) the defense ability of either ant against hemipteran predators and parasitoids, and 4) the proportion of invasive ants required to displace a native colony from a hemipteran resource. Neither ant demonstrated a better ability to sequester liquid resources; however recruitment strategies were much different. Hemipteran populations in the presence of L. humile grew larger in a predator free environment and populations exposed to predators were better defended by L. humile than T. sessile. L. humile was able to displace T. sessile from a nest site without having a majority of worker ants. Aggression of either ant species was significantly reduced without hemipterans present. Understanding factors that drive invasive species can give us insight into native areas that may be susceptible for invasion, how potential mutualist populations might respond and possibly provide us with an avenue for secondary control measures given the economic and ecological importance of invasive species.
APA, Harvard, Vancouver, ISO, and other styles
16

Kahn, Noah D. "The role of summer weed hosts and the Western flower thrips, Frankliniella occidentalis Pergande, in the epidemiology of Tomato spotted wilt tospovirus (TSWV)." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-02272004-101929/.

Full text
Abstract:
Tomato spotted wilt tospovirus (TSWV), a thrips-borne plant virus, occurs globally in economically damaging levels in agricultural, ornamental, and greenhouse crops. In North Carolina, TSWV is vectored primarily by the tobacco thrips, Frankliniella fusca (Hinds), and the Western flower thrips, F. occidentalis Pergande, both of which can acquire and subsequently transmit TSWV only by feeding on infected foliage as young larvae. Females oviposit in suitable plant tissues; therefore, only those plant species susceptible to systemic infection and with the ability to support reproduction by vector species have the potential to be important sources of virus inoculum. We conducted systematic plant surveys to determine the incidence of TSWV and the relative abundance of thrips vector species on summer annual and perennial plants commonly associated with susceptible crops in North Carolina. Frankliniella occidentalis was the most abundant vector and comprised >75% of vector species collected from 18 wild plant species during the summer and fall of 2002. The number of F. occidentalis and F. fusca larvae collected from plant samples, whose presence indicates a plant?s suitability for reproduction, varied significantly among the species sampled. The plant species yielding the largest collections of immature F. occidentalis were tall morningglory (Ipomoea purpurea), carpetweed (Mollugo verticillata), sicklepod (Cassia obtusifolia), and Palmer?s pigweed (Amaranthus palmeri). Plant species most suitable for F. fusca reproduction included Florida pusley (Richardia scabra), M. verticillata, and ivyleaf morningglory (I. hederacea). During surveys of wild plant species in or adjacent to highly TSWV-infected crop fields, TSWV was documented at 16 of 17 locations (94.1%) and in 14 of 30 weed species (46.7%). Estimated rates of infection were highest in I purpurea (6.8%) and I. hederacea (1.9%). Mollugo verticillata returned an unusually high proportion of marginally TSWV-positive samples and conservative estimates of infection rate were 0.5%. However, the actual importance of this species as a TSWV reservoir may be much greater, as liberal estimates (assuming marginal samples were indeed TSWV-infected) indicate an infection rate of 5.4%. These findings document that only a limited number of summer annual or perennial weed species are potentially important TSWV reservoirs or support high levels of vector reproduction in North Carolina. The temporal characteristics of vector abundance and dispersal were documented in the summer and fall of 2002 using aerial sticky traps surrounding 9 agricultural fields. Of vector species captured, 83.3% were F. occidentalis, 11.9% were F. fusca, and the remaining 4.8% were Thrips tabaci Lindeman. The timing of F. occidentalis dispersal, as indicated by mean cumulative proportions of F. occidentalis caught on traps, varied significantly among locations. Patterns of fall dispersal were unrelated to senescence of summer annual weeds, cultivation practices, or the first freeze date. Temporal patterns of TSWV movement were monitored with sentinel tomato plants (Lycopersicon esculentum var. ?mountain fresh?) at the same locations where aerial sticky traps occurred. TSWV-infected sentinel plants were recovered, sporadically and unpredictably, over a 3-month span in the fall of 2002. TSWV movement was not related to thrips dispersal, cultivation date, or summer weed maturation.
APA, Harvard, Vancouver, ISO, and other styles
17

Meck, Elijah. "Phenology of the Twospotted Spider Mite Tetranychus urticae (Acari: Tetranychidae) in North Carolina Tomato Systems." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-03142007-082718/.

Full text
Abstract:
The twospotted spider mite, Tetranychus urticae Koch, is a cosmopolitan and highly polyphagous pest of many fruits, vegetables, ornamentals, and field crops. While twospotted spider mite is a well-documented pest of corn and peanuts in eastern North Carolina, only recently has it been recognized as a consistent and serious pest of vegetables in the piedmont and mountains of North Carolina. Mites infest a number of vegetables in North Carolina including tomato, pepper, eggplant, and sweet corn, but tomato is by far the most seriously affected crop. The objectives of this study were to 1) determine the effect of vegetation on the dispersal of twospotted spider mites from tomatoes to overwintering hosts, and 2) to investigate the potential importance of various factors, including location, planting date, field history, surrounding area, pesticide use, and mite populations in surrounding vegetation, that may affect mite infestations in tomato fields in different regions of North Carolina. Two vegetation management techniques (herbicide and cultivation) plus an untreated control plot were established around senescing tomato plants. Twospotted spider mite dispersal was monitored by planting chickweed trap plants at 2, 6, and 12 m from the tomatoes. Sampling took place in the fall of 2004 & 2005 and the spring of 2005 & 2006. Only a small number of mites were collected in the 2004-2005 sampling period, making it difficult to draw conclusions. The 2005-2006 sampling period showed that herbicide-treated soil facilitated mite dispersal in the fall, while there were no differences in mite populations among treatments in the spring, suggesting a high rate of overwintering mortality. Tomato fields in the mountains and piedmont region were sampled in a grid pattern on a bimonthly basis to determine the importance of year, location, planting date, previous crop, adjacent crop, insecticide use, acaricide use, and mite populations in surrounding vegetation on mite intensities in those fields. Based on samples from 80 tomato fields, previous crop, acaricide use, insecticide use, and mite intensity in the weeds were important factors that were associated with seasonal mite intensity in tomato fields. Acaricide use and mite intensity in the weeds were important factors associated with the maximum mite intensity in tomatoes. Year, location, planting date, and acaricide use were all important factors associated with the time it took for tomato fields to reach their maximum density. Upon further analysis, it was found that none of the dependent variables (year, location, previous crop, adjacent crop, planting date, acaricide use, insecticide use) were associated with seasonal mite intensity in weeds or mite intensity in weeds on the last two sample dates. However, previous crop and insecticide use were significant factors associated with mite intensity in weeds on the first two sample dates. Furthermore, seasonal mite intensity in weeds was significantly correlated with seasonal and maximum mite intensity in tomato fields. While previous crop, current season insecticide use, and mite intensity in weeds were factors associated with mite intensities in the field, a high overwintering mortality appeared to negate the effects of these factors; consequently it was not possible to predict in advance fields that were most susceptible to high mite infestations. Acaricides will likely remain a key management strategy in the near future, and the development of sampling plans and economic thresholds will be necessary to use these materials in a judicious manner.
APA, Harvard, Vancouver, ISO, and other styles
18

Blinka, Eric Lee. "BIOLOGICAL AND ECOLOGICAL STUDIES ON GREEN STINK BUG, Acrosternum hilare, AND BROWN STINK BUG, Euschistus servus (HEMIPTERA: PENTATOMIDAE), IN EASTERN NORTH CAROLINA CROPPING SYSTEMS." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-04282008-114706/.

Full text
Abstract:
In 2004 through 2007, biological and ecological studies were conducted on the stink bug complex across Eastern North Carolina with emphasis on the brown stink bug, Euschistus servus (Hemiptera: Pentatomidae). Ecological studies included the use of survey samples, pheromone traps, and black light traps to monitor brown stink and green stink bug, Acrosternum hilare (Hemiptera: Pentatomidae), movement across selected Eastern North Carolina agro-ecosystems. Ecological research also focused on the movement of brown stink bugs within a wheat / corn agro-ecosystem through the use of sweep net samples and whole plant examinations, along with the vertical distribution of brown stink bugs on corn plants. Based upon brown stink bugs ability to fully complete the F1 generation within wheat in NC, historical weather data was examined utilizing a sine wave growing degree day model to predict the number of generations possible. The relationship among differing stink bug boll-feeding symptoms (external signs vs. internal symptoms) and boll damage to lint gin-out and quality were also examined. The last ecological study focused on the evaluation of the relationship between stink bug pressure and yield under a regressive spray treatment. A molecular study was conducted to help validate brown stink bug movement between crops by separating proteins of crop host from insect guts utilizing gel electrophoresis and mass finger printing the peptides. The peptides were then searched against the Viridiplantea data base for conformation which crop host proteins were derived from. Results from this work have given some insight to the biological and ecological movement of stink bugs across Eastern North Carolina. It has also demonstrated that there is a need for further investigation into the stink bug complex.
APA, Harvard, Vancouver, ISO, and other styles
19

Donohue, Kevin Vincent. "Analysis of the Effects of a Dielectric Barrier Discharge on Arthropod Pests." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-06012005-215408/.

Full text
Abstract:
Atmospheric pressure plasma discharge (APPD) has been intensely studied in the past fifteen years as a method of sterilization. The effects of APPD on insects were previously unknown. The purpose of this study was to examine whether plasma could be useful for insect and mite control, determine the mode of action on arthropods, and optimize the discharge in order to achieve the shortest APPD treatment times. A positive correlation was found between exposure time to APPD and insect mortality with the level of mortality also increasing with time after treatment for western flower thrips, Frankliniella occidentalis (Pergande), tobacco thrips, Frankliniella fusca (Hinds), Asian tiger mosquito, Aedes albopictus (Skuse), two-spotted spider mite, Tetranychus urticae Koch, and German cockroach, Blattella germanica (L.). Generally, mortality was negatively correlated with the weight of the insect. Cockroaches exposed to APPD for 60, 90, 120 and 180s lost on average 7.5 ± 0.8, 8.1 ± 0.6, 8.7 ± 0.4, and 10.1 ± 1.1 (±1 SEM) mg of water weight, respectively, which was an increase over that of the controls. The metabolic rate of cockroaches exposed to plasma for 180 s increased from 0.80 ± 0.03 to 1.07 ± 0.04 ml of oxygen consumed mg-cockroach -1 h-1 at STP. The level of cuticular hydrocarbons identified by EI GC-MS were not significantly affected by plasma exposure in the green peach aphid, Myzus persicae (Sulzer), German cockroach, and citrus mealybug Planococcus citri (Risso) except for a reduction in n-tritriacontane only in the latter. However, changes in the behavior of cockroaches after plasma exposure including the loss of photo-, vibro-, and thigmotropic responses, inability to right themselves, and hyperexcitatory symptoms, suggests that the site-of-action of APPD in insects is the nervous and/or neuromuscular system. The LT50 of German cockroaches, western flower thrips, and citrus mealybugs 24 h after exposure to a 37°C helium discharge was 333.77, 28.72, and 999.95 s, respectively. The LT50?s 24 h after exposure to a 37°C, 0.5% oxygen/99.5% helium discharge was 232.67, 19.99, <13.83 s, respectively. The LT50 of German cockroaches, western flower thrips, and citrus mealybugs 24 h after exposure to the 50 ± 2°C, helium discharge was 117.80, 13.83, and 26.62 s, respectively. No mortality resulted in German cockroaches or citrus mealybugs after exposure to a helium atmosphere followed by 50°C air, however the LT50 of western flower thrips was 29.04 s, based on the mortality recorded 24 h after treatment. The addition of oxygen or heat to the discharge resulted in higher mortality in cockroaches and mealybugs but not thrips.
APA, Harvard, Vancouver, ISO, and other styles
20

Jones, Joshua Raymond. "Phylogeny and systematics of the leafhopper subfamily Ledrinae (Hemiptera: Cicadellidae)." NCSU, 2006. http://www.lib.ncsu.edu/theses/available/etd-08142006-171318/.

Full text
Abstract:
Ledrinae represent a relatively small subfamily within the very large and diverse leafhopper family Cicadellidae. Prior to this study, the subfamily contained approximately 450 species in 5 tribes and 73 genera distributed worldwide, but primarily in Australia, Africa, and the Indomalayan region. Several authors have suggested Ledrinae are not monophyletic, and recent studies based on molecular and morphological data have called the existing classification into question. The goals of this study were to collect and analyze morphological data under rigorous phylogenetic criteria in order to test the monophyly of Ledrinae, provide robust definitions for the subfamily and its tribes, and provide a phylogenetic framework for understanding relationships among these leafhoppers. New phylogenetic hypotheses are presented here regarding the monophyly of Ledrinae and its included tribes. A total of 235 morphological characters were coded for 60 species from 31 genera in the tribes Ledrini and Petalocephalini, 5 species from the tribes Stenocotini, Thymbrini, and Xerophloeini, and 10 species selected as outgroups from various other cicadellid subfamilies. Data were analyzed in PAUP* and resulted in a single completely resolved topology with many well-supported nodes. Ledrinae, as previously defined, was found to be polyphyletic with respect to Stenocotini, Thymbrini, and various ledrine genera, which were placed with the outgroup taxa. Stenocotini and Thymbrini were placed with Tartessinae, agreeing with results of other recent studies. Rubria, Hespenedra, and the Afrorubria genus group formed independent lineages within Ledrinae. Xerophloeini was placed as a basal lineage within Ledrinae closely associated with the Afrorubria group. Ledrini and Petalocephalini, as previously defined, did not form monophyletic lineages, but were randomly interspersed with respect to one another. Stenocotini and Thymbrini are here removed to the subfamily Tartessinae, and Petalocephalini is made a synonym of Ledrini. Three new tribes are described within Ledrinae. Taxa placed outside of Ledrinae in this analysis are removed to other subfamilies or considered unplaced within Cicadellidae. This newly revised classification strengthens hypotheses that the Ledrinae are a very old group within Cicadellidae. As here defined, the subfamily includes five tribes with a total of 37 genera.
APA, Harvard, Vancouver, ISO, and other styles
21

Swink, Whitney Garland. "The Dance Flies (Diptera: Empidoidea) of Madagascar." NCSU, 2009. http://www.lib.ncsu.edu/theses/available/etd-10302009-191803/.

Full text
Abstract:
The Empidoidea are a monophyletic superfamily of flies that includes dance flies (Empididae), long-legged flies (Dolichopodidae), and several small families (Atelestidae, Hybotidae, and Brachystomatidae). Empidoids are found worldwide and contain many thousands of species, but none have ever been described from Madagascar. An ongoing biodiversity survey by the California Academy of Sciences has brought to light many hundreds of undescribed empidoids from the island. This research project involves description, databasing, and DNA barcoding to establish the first estimates of empidoid species diversity in Madagascar. This study will contribute to critical surveys of species richness for rapidly degrading habitats in this important biodiversity hotspot. Representatives from two empidoid families, Empididae and Hybotidae were collected from Madagascar. There are eight new species of Hybos (Hybotidae: Hybotinae) from Madagascar: H. gardneri sp. nov., H. flaviarticulus sp. nov., H. verykoukis sp. nov., H. fianarantsoensis sp. nov., H. exastis sp. nov., H. triangulus sp. nov., H. angustifacies sp. nov., and H. ignotopalpus sp. nov. All species are described and male genitalia are illustrated. DNA barcoding was performed on the flies from the subfamily Hybotinae in order to infer species limits, but due to poorly preserved or degraded DNA, no definitive conclusions could be drawn. To aid identification, eight new barcodes were obtained that will be submitted to the barcode library upon publication of the new species. All data collected for the Madagascar empidoids have been recorded in a Mandala database and all images have been uploaded into Morphbank. Additionally, a LucID key is available on the Internet for species identification.
APA, Harvard, Vancouver, ISO, and other styles
22

Rochon, Katreyn. "Vector Potential of Stable Flies (Stomoxys calcitrans) for the Transmission of Porcine Reproductive and Respiratory Syndrome Virus." NCSU, 2008. http://www.lib.ncsu.edu/theses/available/etd-11282008-160747/.

Full text
Abstract:
Porcine Reproductive and Respiratory Syndrome (PRRS) is a globally significant viral disease of swine. The link between outbreaks in separate farms within an area remains unclear despite biosecurity measures. We have investigated the vector potential of stable flies in the transmission of PRRSV under laboratory conditions. We first determined that blood seeking stable flies are attracted to pigs by olfactory cues. We determined stable flies could acquire the virus through a bloodmeal, and the amount of virus in the flies declined with time, indicating the virus does not replicate in fly digestive tissues. Transmission of the virus to naïve pigs failed in all attempts. The volume of blood contained in the closed mouthparts of the stable fly appears to be insufficient to deliver an infective dose of the virus. We further examined the fate of PRRS virus in the hemolymph of the flies following a midgut barrier bypass. Virus levels were up to 9,500 times greater in the hemolymph when compared to those detected in the digestive tract at the same time point. Further study to test the saliva of inoculated stable flies for presence of the virus is needed to determine if PRRS virus can enter and escape stable fly salivary glands. Although stable flies are unlikely vectors of PRRS virus between animals, they may play a role in virus dissemination by harboring the virus and contaminating the environment.
APA, Harvard, Vancouver, ISO, and other styles
23

Thornton, Melissa Rose. "Arthopod Fauna Associated With Kudzu (Pueraria montana var. lobata Willd) In North Carolina." NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-11302004-203434/.

Full text
Abstract:
The purpose of this research was to obtain background information to aid the implementation of a biological control program against the weed, kudzu (Pueraria montana var. lobata Willd). This research had several specific objectives that examined: 1) potential insect pollinators and seed production of kudzu in NC; 2) phytophagous insects and insect herbivory of kudzu foliage, seeds, vines and roots in NC; 3) abundance and diversity of foliar, vine, and root feeding insect communities on kudzu in comparison with those found on soybeans, the closest North American relative of kudzu in the United States. Kudzu is pollinated by native and naturalized insects in NC, in a pattern that varies by flower apparency rather than density. Arthropod herbivory by native generalists almost eliminated kudzu seed viability, while a naturalized Asian specialist consumed a nominal proportion of seeds. These data indicate that seed feeding arthropods would be poor candidates for importation biological control. Kudzu and soybeans shared the same foliar feeding insect communities and levels of defoliation, suggesting that foliage feeders are also poor choices for importation. No kudzu vine or root feeding insects or damage were found during the two years of this study, suggesting that future importation biological control research should focus on such feeders from Asia.
APA, Harvard, Vancouver, ISO, and other styles
24

Cabrera, Juan Carlos. "Interactions between Spodoptera frugiperda (Lepidoptera: Noctuidae) and Bt-transgenic sweet corn." NCSU, 2002. http://www.lib.ncsu.edu/theses/available/etd-20020124-155923.

Full text
Abstract:

Field experiments were conducted to investigate the effects of Cry1Ab toxin of Bacillus thuringiensis expressed in transgenic sweet corn (Attributeä) on larval dispersal and larval density of the fall armyworm, Spodoptera frugiperda (Smith), which could affect rates of adaptation to Bt corn. Crop phenology and agronomy were also tested to determine the affects of rapid corn maturation and tillers on insect survival. Behavior and dispersal of larvae from the neonate to 10 day-old larval stage was measured in single variety plots of Bt and conventional plants. Each plot was artificially infested with one egg mass to test the hypothesis that Bt toxins affect larval behavior, increasing dispersal of early instars. Results indicated that crawling behavior of neonates was similar in both varieties but larvae settled faster on conventional plants. Larval dispersal among plants was also statistically similar in both varieties at all sampling dates. In separated plots, two larval densities and three planting dates were studied. Mortality of fall armyworm larvae in Bt sweet corn was not density-dependent. Early entry of the corn plant into reproductive stage apparently affected larval survival. There is not differential larval utilization and survival in tillers versus main whorls of Bt and non-Bt plants. Insect adaptation to Bt toxins is likely affected by larval dispersal and rapid maturation of corn plants.

APA, Harvard, Vancouver, ISO, and other styles
25

Crowder, David William. "Genetics and Management of Resistance to Pyriproxyfen in the Whitefly Bemisia tabaci." Diss., The University of Arizona, 2008. http://hdl.handle.net/10150/195576.

Full text
Abstract:
Selective insecticides such as insect growth regulators that kill pests but cause little or no harm to non-target organisms have become increasingly important in crop production systems worldwide. The insect growth regulator pyriproxyfen has been successfully used for the last decade in Arizona as part of an integrated pest management (IPM) program for the sweetpotato whitefly, Bemisia tabaci, a problematic pest in Arizona and other regions of the world throughout the world.A serious threat to the continued success of the IPM program in Arizona is the evolution of insecticide resistance in B. tabaci. To enhance the ability to design sound strategies for managing whitefly resistance to pyriproxyfen we: 1) compared susceptibility to pyriproxyfen between male and female B. tabaci; 2) determined the dominance of pyriproxyfen resistance; 3) determined if fitness costs were associated with resistance; 4) estimated the number of genes affecting resistance; 5) developed resistance management models.Laboratory and field bioassays investigated the genetics of pyriproxyfen resistance in males and females from a pyriproxyfen-susceptible and pyriproxyfen-resistant strain (>1000 fold resistance). Results showed that male and female B. tabaci did not differ in susceptibility to pyriproxyfen, resistance was partially to completely dominant under approximated field conditions, and fitness costs were not associated with resistance. Similar traits in field populations could threaten the efficacy of pyriproxyfen. Model results indicated that the current IPM program for B. tabaci could be improved by curtailing the use of pyriproxyfen in cotton-intensive regions, synchronizing the use of pyriproxyfen with key crop production stages in the field, and applying the lowest pyriproxyfen concentration needed to provide effective control.Knowledge generated from this research has provided insight into factors affecting B. tabaci resistance to pyriproxyfen, which could improve management strategies for B. tabaci in Arizona cotton and other crops. This project represents a proactive approach to understanding pyriproxyfen resistance and its potential impacts before resistance evolves to problematic levels in the field. In addition, the project provided insight into mechanisms affecting resistance in a haplodiploid pest. Thus, the research can serve as a model for basic research on other haplodiploid pests.
APA, Harvard, Vancouver, ISO, and other styles
26

Asiimwe, Peter. "Relative Influence of Plant Quality and Natural Enemies on Population Dynamics of Bemisia tabaci and Lygus hesperus in Cotton." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/203487.

Full text
Abstract:
The bottom-up effects of plant quality and the top-down effects of natural enemies are two of the most important factors governing the abundance, distribution and performance of insect herbivores. Plant quality effects are generally manifested through changes in nutrients, morphology, size or host availability. Natural enemy effects are mainly observed through the action of arthropod predators and parasitoids. The relative influence of these effects has been well studied in several natural and forest ecosystems but has rarely been evaluated in agro-ecosystems. In manipulative field experiments, I examined the relative influence of plant quality and natural enemies on the abundance and performance of Bemisia tabaci and Lygus hesperus, two important pests of cotton.This dissertation begins with an evaluation of the relative influences of plant quality (manipulated through differential irrigation) and natural enemies (manipulated by insecticide exclusion) on the seasonal dynamics of B. tabaci in cotton. I found higher densities of all B. tabaci stages when natural enemy densities were reduced, regardless of level of plant quality. Generally, densities of B. tabaci did not vary with plant quality. Similarly, natural enemy densities and predator:prey ratios were not affected by plant quality, indicating that natural enemies exert a greater influence on seasonal dynamics of B. tabaci than plant quality. I then evaluated the mechanism responsible for herbivore density patterns using cohort-based life table studies. I found lower rates of predation and parasitism when natural enemy densities were reduced across all levels of plant quality, with predation the primary key factor associated with changes in generational mortality. Levels of B. tabaci mortality did not vary with plant quality indicating that the impact of natural enemies was not mediated by the bottom-up effects of plant quality. Finally, I evaluated these effects on L. hesperus and found that plant quality significantly affected seasonal dynamics with the greatest and smallest densities on the highest and lowest quality plants, respectively. These effects did not translate to natural enemy effects, as their density and impact were not affected by plant quality. The implications of these findings for the management of these pests in cotton are discussed.
APA, Harvard, Vancouver, ISO, and other styles
27

Parnell, Robin Stewart. "Environmentally Induced Color Polymorphism in Caterpillars of Biston betulavia lognataria." W&M ScholarWorks, 1992. https://scholarworks.wm.edu/etd/1539625731.

Full text
APA, Harvard, Vancouver, ISO, and other styles
28

Orr, Harold Allen. "Social Factors Affecting Male Reproductive Success in Nasonia vitripennis." W&M ScholarWorks, 1985. https://scholarworks.wm.edu/etd/1539625295.

Full text
APA, Harvard, Vancouver, ISO, and other styles
29

Lassiter, Mark Timothy. "A Survey of House Dust Mites in the Williamsburg Area." W&M ScholarWorks, 1985. https://scholarworks.wm.edu/etd/1539625296.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Steele, Robert Perry. "Environmental Factors Affecting Dispersal Behavior in Nasonia vitripennis (Hym, Pteromalidae)." W&M ScholarWorks, 1985. https://scholarworks.wm.edu/etd/1539625297.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Bryant, Douglas Stuart. "The Effect of Kinship on Reproductive Success of Male Nasonia vitripennis (Hymenoptera: Pteromalidae)." W&M ScholarWorks, 1985. https://scholarworks.wm.edu/etd/1539625301.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Turnbull, Matthew William. "Characterization of the Defensive Efficacy of the Sternal Secretion of Eurycotis floridana (Walker) (Dictyoptera: Blattidae)." W&M ScholarWorks, 1999. https://scholarworks.wm.edu/etd/1539626211.

Full text
APA, Harvard, Vancouver, ISO, and other styles
33

MacLean, Heidi Joan. "Temperature, Photoperiod, and Life History Traits in Drosophila subobscura." W&M ScholarWorks, 2015. https://scholarworks.wm.edu/etd/1539626961.

Full text
APA, Harvard, Vancouver, ISO, and other styles
34

Yi, Minyoung Janet. "Variation in Egg Size and Number in Drosophila subobscura." W&M ScholarWorks, 2006. https://scholarworks.wm.edu/etd/1539626847.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Zukoff, Sarah N. "Resistance Management of the Western Corn Rootworm ( Diabrotica virgifera virgifera)| Behavior, Survival and the Potential for Cross Resistance on Bt Corn in the Field, Greenhouse and Laboratory." Thesis, University of Missouri - Columbia, 2019. http://pqdtopen.proquest.com/#viewpdf?dispub=13877180.

Full text
Abstract:

The Environmental Protection Agency recently registered seed blend refuges for two of the transgenic Bt corn products targeting the western corn rootworm (WCR), Diabrotica virgifera virgifera LeConte. Larval movement between Bt and isoline plants can be detrimental to resistance management for high dose Bt products because the insect larvae will potentially be exposed to sublethal amounts of the Bt, however, the effect of this movement on low to moderate dose products is unknown. All current rootworm products are low dose. The main criteria for whether movement by WCR larvae between isoline and Bt corn plants will influence the development of resistance is whether or not selection for resistance is taking place. We found that movement between isoline and SmartStax® hybrid plants did occur in seed blend scenarios in our field study. The majority of plant damage to the SmartStax plants occurred when the larvae moved from surrounding infested isoline plants moved late in their development. These older, larger larvae are all able to tolerate the Bt in the plants, therefore resistance will likely not develop in these larvae. In a similar experiment, movement also occurred between Agrisure® Duracade™ and isoline plants in seed blend scenarios, however the damage was low for all treatments. With isoline plants being mixed with Bt plants in seed blend refuges, host recognition behavior of the western corn rootworm on Bt and isoline plants is also important to understand. There were no differences between the host recognition behavior of WCR larvae after exposure to mCry3A, Cry3Bb1, Cry34/35Ab1, or their isoline corn hybrids, therefore all hybrids were perceived as hosts by WCR larvae. With all the hybrids on the currently registered being pyramided by different companies to control rootworms, the potential for cross resistance between these hybrids was evaluated using field resistant and susceptible populations. Based on the data from laboratory and greenhouse assays, the potential for cross resistance between mCry3A and Cry3Bb1 might be likely, but not between these hybrids and Cry34/35Ab1. Information gathered in this study provides important behavioral information on western corn rootworms that will aid in making decisions involving Bt corn hybrids.

APA, Harvard, Vancouver, ISO, and other styles
36

Linkous, Emily Kathryn. "Integrating biological control and chemical control of cabbage caterpillar pests." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366362436.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Benoit, Joshua B. "Molecular and Physiological Responses of Hematophagous Arthropods to Dehydration." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259688964.

Full text
APA, Harvard, Vancouver, ISO, and other styles
38

Talamas, Elijah Jacob. "Revision and Systematics of Three Genera of Parasitoid Wasps: Paridris, Oreiscelio, and Trichoteleia (Hymenoptera: Platygastroidea); and Exploration of Chemoreceptor Genes in Trissolcus basalis (Wollaston)." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1345049405.

Full text
APA, Harvard, Vancouver, ISO, and other styles
39

Martinez, Giancarlo Lopez. "Environmental and Behavioral control of the American House Dust Mite, Dermatophagoides Farinae Hughes." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392822781.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Kapraly, Edward C. "An Experimental Study of Survival and Mortality of Callosamia promethea (Drury) [Lepidoptera: Saturniidae] Eggs in Central Ohio." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392824212.

Full text
APA, Harvard, Vancouver, ISO, and other styles
41

McLeod, Murdick John. "Damage Assessment and Biology of Foliar Grape Phylloxera (Homoptera: Phylloxeridae) in Ohio." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1392915749.

Full text
APA, Harvard, Vancouver, ISO, and other styles
42

Kahn, Jonathan Kenneth. "The effect of managed fire, isolation, and habitat fragmentation on forest Lepidoptera diversity." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1407149455.

Full text
APA, Harvard, Vancouver, ISO, and other styles
43

Smith, Adrienne E. "Saprophytic scarabaeidae (Coleoptera) as generalists or specialists: community structure and the volatile chemical profile of decomposing dung, carrion and fungi." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1409230472.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Miller, Stephanie M. "Biological control tactics for suppression of adult striped cucumber Acalymma vittatum, with natural enemy parasitoid, Celatoria setosa, and insect parasitic nematode, Heterorhabditis bacteriophora." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1399901618.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Deol, Yadwinder S. "Development of a novel delivery system for entomopathogenic Nematodes." The Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406714648.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Garces, Sandra Victoria. "Potential of Entomopathogenic Nematodes and their symbiotic bacteria and preliminary assessment of Harmonia Axyridis (Pallas) (Colepotera: Coccinellidae) for control of grape phylloxera (Hemiptera: Phylloxeridae)." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406882872.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Silverman, Bareena R. "Changes in Ground Beetle (Coleoptera: Carabidae) Communities as a Result of the Creation of a Corridor through Previously Intact Forest in Southeastern Ohio." The Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420557663.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

Song, Hojun. "Post-Emergence Development of Male Genitalia in Schistocerca Americana (Drury) (Orthoptera: Acrididae: Cyrtacanthacridinae)." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420561049.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Mbey-yame, Asanzi Christopher. "Studies of epidemiology of maize streak virus and its Cicadulina leafhopper vectors in Nigeria." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487688973682896.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Zhang, Mei-Ling. "A maternal effect that influences pupal diapause in progeny of the flesh fly, Sarcophaga Bullata Parker (Diptera: Sarcophagidae) /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487861396026827.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the bibliographies on the topic 'Of Entomology' for other source types:
Journal articles Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography