Global ETD Search
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Showing 1 to 13 of 13 for “"hostplant"”.
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Orientation of polyphagous lepidoptera to hostplant kairomones
… lepidopterans oviposition kairomones from hostplants can also serve as larval feeding stimulants, the relationships in chemistry of attraction of larval and adult stages to hostplants have rarely been examined in polyphagous species. Volatile constituents are known to serve as attractants …
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Comparative chemical ecology of invasive Depressaria species (Lepidoptera: Depressariidae) varying in hostplant specificity
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2024-05-01
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Characterization of a hostplant-inducible cytochrome P450 from the black swallowtail caterpillar, Papilio polyxenes (Lepidoptera: Papilionidae)
Cytochrome P450 monooxygenases (P450s) function in the oxidation of countless xenobiotic and endogenous substrates, and are among the most important enzymes utilized by herbivores in detoxifying plant defensive compounds. This thesis describes the identification and molecular cloning of a P450 …
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Hostplant-Related Causes of Unequal Parasitoid Exploitation of Two Leafminers, Tildenia Georgei and Tildenia Inconspicuella (Lepidoptera: Gelechiidae), on Solanaceous Weeds (Defensive Behavior, Life History, Plant Trichomes, Species Richness, Enemy-Free Space)
… georgei. Mean yearly parasitoid species richness/hostplant patch/sampling date was 2-5 times higher and species diversity and richness/date were 2-3 times greater on T. inconspicuella despite similar leafminer densities and correction for possible sampling, rearing, and patch location biases. T. …
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From metacommunity dynamics to rapid biodiversity assessment: DNA-based approaches expand horizons in both fundamental and applied ecology
… in the three most common species. Where hostplant density is high, a clear dispersal hierarchy is detected, which correlates positively with ant body size and negatively with fecundity, consistent with the hypothesis of a dispersal-fecundity trade-off. The hierarchy is less clear when …
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Habit Preferences and Fidelity in the Cotesia Flavipes Complex (Hymenoptera: Braconidae): Current Preferences and the Potential for Change Through Learning and Selection
… and evolutionary change. I show that the hostplant of their larval host is unlikely to change the plant preferences of the adult wasp. Moreover, through an artificial selection regimen, I show that these wasps are unlikely to shift plant preferences through natural selection. Given my …
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Spatial ecology of an insect host-parasitoid-virus interaction: the winter moth (Operophtera brumata) and its natural enemies in Orkney
… enemies. Both species feed on the same hostplant, Calluna vulgaris, in the Orkney isles, Northeast Scotland. Natural enemy prevalence was rarely related to host density of either species at any scale. Significant host density dependence in infection was detected only among horizontally …
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Effects of Nutrients and Minerals on Growth and Detoxification in Phytophagous Insects
… the ability of phytophagous insects to utilize a hostplant. One way dietary deficiencies of these compounds may reduce insect performance is by affecting activities of detoxification enzymes, thereby altering susceptibility to host plant allelochemicals. In this study I examined the influence of …
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Processing of plant-associated odors by a subset of projection neurons in the antennal lobe of the female moth, Manduca sexta
… AC neurons in response to flowers of Solanaceous hostplants. Among the odors tested were nitrogen (N)-bearing compounds, monoterpenes, aromatics and green-leaf volatiles. The response profiles were divided into different response categories: "excited" (multiphasic), "inhibited", "mixed" and "no …
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Molecular Definition of Cytochrome P450 -Mediated Multiple Resistance in Helicoverpa Zea
… arm themselves against subsequent build-up of hostplant toxins by ""eavesdropping"" on plant defense signals. These results also suggest that, at least in the species examined, counterdefense proteins from generalists are structurally more flexible and functionally more diverse than those from …
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Long-term effects of insecticides on environmental health: How does exposure of a female egg-laying insect to an insecticide affect subsequent generations?
… imidacloprid) were not effective at locating a hostplant. These results showed that whilst some effects could be observed after initial direct exposure to females (namely from deltamethrin), the most substantial sublethal effects were actually transgenerational rather than direct. Overall, …
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Facultative mutualism between the navel orangeworm Amyelois transitella (Lepidoptera: Pyralidae) and Aspergillus flavus
… allows the navel orangeworm to utilize its hostplants more efficiently, I conducted a series of laboratory bioassays to test if the presence of A. flavus decreases the toxicity of hostplant phytochemicals. Growth rates, mortality rates, and pupal weight for navel orangeworms were measured on …
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Microlepidoptera of Illinois hill prairies
… the sites, which reflects a high level of larval hostplant specificity in most species of Pyraloidea and Tortricidae. Based on published information plus observations made on microlepidoptera collected during the course of this study, 31 families of basal microlepidoptera were reviewed with an aim …