Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"Trichoplusia ni"”.
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A study of the fine structure and the function of the ocellus of the adult cabbage looper (Trichoplusia ni, Hübner) (lepidoptera: noctuidae)
… looper ocellus plays a major role in determining the light intensity at which crepuscular flight is initiated. This hypothesis was tested in the following manner. Laboratory reared moths were divided into five groups each with a different or no treatment. These were: 1. Compound eyes and …
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Effects of Nutrients and Minerals on Growth and Detoxification in Phytophagous Insects
… exposed to prooxidant secondary chemicals. In Trichoplusia ni, a generalist herbivore, vitamin A ameliorates phototoxicity caused by ingesting citral, an insecticidal monoterpene. As an antioxidant, vitamin A may protect against UV-mediated citral damage by scavenging free radicals or quenching …
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Effects of low intensity magnetic fields on cabbage loopers
… were studied using the cabbage looper moth, Trichoplusia ni (Hubner). In the first tests, adult loopers were used to determine their locational preference in response to areas of stronger or weaker magnetic field ranging from slightly above the geomagnetic field strength to a strength of 120 …
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Effect of electrostatic fields on insects: the housefly and cabbage looper
… on insects were studied using cabbage loopers, Trichoplusia ni (Hubner) and houseflies, Musca domestica L. Two series of tests were conducted; one to determine the electrostatic field effect on the locational preference and the other to determine the field effect on wingbeat. Among the field …
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Effects of resveratrol on development of three lepidopteran species varying in diet breadth
… development studies on many different model organisms, including several insect species. Results from these studies have been inconsistent across species; these inconsistencies may reflect the fact that many of these model organisms do not encounter resveratrol in their natural diets. In this …
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The Effects of Synthetic and Naturally Occurring Compounds on Microsporidian Infection in Insects
… intracellular, protist parasites infecting many animals, including insects and humans. There are currently no drugs available to cure microsporidiosis. In this thesis, I describe my work examining the effects of phytochemicals and pharmaceutical drugs on microsporidian infection in insects. Of 15 …
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Diagnóstico de plagas y enemigos naturales en el cultivo del ajonjolí (Sesamum indicum L.) durante el ciclo 1997/1998 en cuatro comunidades del departamento de León, Nicaragua
… y postrera, estableciéndose parcelas en las comunidades Chacraseca, La Ceiba, Abangasca y Los Lechecuagos del departamento de León, Nicaragua.Se realizaron muestreos semanales, los métodos de muestreos utilizados fueron: Panas amarillas, trampas Pitfull, red entomológica así como muestreos de …
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Evaluation of the potential of Pteromalus puparum (L.) (Hymenoptera: Pteromalidae) for suppression of the imported cabbageworm and parasitism of the diamondback moth
… <i>Artogeia rapae</i> (L.)), cabbage looper <i>Trichoplusia ni</i> (Hubner)) and diamondback moth (<i>Plutella xylostella</i> (L.)) was determined in 1982 to 1984 on cabbage in southwest Virginia. The imported cabbageworm was the most important pest. It had one and a partial second generation in …
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Hydrogen peroxide from photosynthesis: Theory and experiments linking elevated atmospheric CO2 with C3 plant chemical defense
… defense against biotic agents, and 2. the mechanism of this control is sensitive to atmospheric concentrations of CO2. Chapter 1 reviews available research concerning the influence of elevated CO2 on C3 plant chemical defense against biotic agents, herbivorous insects in particular. The argument …
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Host specific gene expression of the baculovirus, Spodoptera frugiperda nuclear polyhedrosis virus, in insect cell lines
… it is essential to understand the molecular mechanisms of virulence and specificity of baculovirus infection. Our laboratory has developed three tissue culture model systems to study host specificity. This research focuses on System II, developed by Carpenter and Bilimoria, in which Spodoptera …
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Maintaining the balance: persistent baculovirus infection in insect cells
Baculoviruses such as Autographa californica nucleopolyhedrovirus (AcMNPV) are insect-specific viruses that usually kill the host. However, many species harbour persistent, non-lethal covert baculovirus infections although these have rarely been observed in vitro. Hence, little is known about the …
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Regulation of late and very late gene expression in both lytic and persistent baculovirus infections
Autographa californica nucleopolyhedrovirus (AcMNPV) is an insect-specific pathogen, with a biphasic replication cycle generating both budded viruses (BVs) and occlusion bodies (OBs). While BVs are released from the cell membrane mainly in the late phase of infection, OBs are produced in the …
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Local impacts of White-nose Syndrome on the foraging ecology of insectivorous bats
… body size, and wing presence. Laboratory-reared Trichoplusia ni moths were grouped into large and small size classes, and wings were removed from half the moths in each size class. Bomb calorimetry was used to determine the gross heat (cal/g) of moths in each treatment. To account for potential …
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Constraints on plant resistance and tolerance trade-offs
… Therefore, plants have evolved a variety of mechanisms to mitigate the negative effects of herbivory. Much of what we have learned, to date, on plant responses to their enemies (herbivores and pathogens) have focused on the evolution of chemical and structural traits that reduce or prevent tissue …
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Identifying mechanisms of pyrethroid resistance in the navel orangeworm and novel methods of control
… pest of almonds and pistachios in California orchards. Increasing demand for these commodities has resulted in acreage expansions and substantial increases in the application of insecticides to reduce damage by A. transitella. Pyrethroid insecticides have historically been the most heavily …
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Specificity in the ecology and evolution of plant defense against herbivores: Identity and history
Biotic interactions can structure communities, drive succession, and account for patterns of biodiversity, yet we currently know little about how multiple biotic factors interact to influence traits in ecological and evolutionary time. Moreover, variation in biotic interactions among native and …
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Biochemical characterisation of a novel vaccine candidate against Trypanosoma vivax, the cell surface glycoprotein IFX
… biochemical characterisation and antibody recognition of a recently discovered cell surface glycoprotein and vaccine candidate, Invariant Flagellum Antigen from Trypanosoma vivax (IFX) from the kinetoplastid parasite Trypanosoma vivax. African trypanosomes are unicellular protozoan parasites and …