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 7 of 7 for “"Forest pest"”.
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Effects of a dual application of entomopathogenic nematodes and entomopathogenic fungi against a forest pest, Hylobius abietis L. (Coleoptera: Curculionidae) and a horticultural pest, Otiorhynchus sulcatus F. (Coleoptera: Curculionidae)
… (black vine weevil) cause economic damage to forestry and horticultural crops, respectively. Large pine weevil larvae develop in the tree stumps, emerge as adults and feed on the bark of newly planted saplings, causing extensive mortality. Black vine weevil larvae kill plants by feeding on the …
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Stated and Revealed Preference Valuation of Forest Ecosystems
… which can also be applied to make evaluation of forest ecosystem. In the application of these evaluation methodologies, there always exists limitation from the data collection and empirical analysis. In the dissertation here, I extend the traditional evaluation methods with novel design or …
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Bat Habitat Ecology Using Remote Acoustical Detectors at the Army National Guard Maneuver Training Center - Fort Pickett, Blackstone, Virginia
… benefits as consumers of agricultural and forest pest insects. Bats have been proposed as good indicators of the integrity of natural communities because they integrate a number of resource attributes and may show population declines quickly if a resource attribute is missing. Establishing …
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The role of olfaction in host-finding by two specialist predators of hemlock woolly adelgid
… Adelges tsugae Annand (Homoptera: Adelgidae), is forest pest introduced to eastern North America in the early 1950's. Although this pest occurs on both landscape and nursery stock as well as in natural stands of hemlock forest, pesticides are only practical and effective in urban settings. …
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Local Variation in the Chemical Defence of European Pine Sawfly (Neodiprion sertifer): Effects of Host Tree Chemistry and Social Environment
… is an example of a chemically defending forest pest insect that sequesters resinous acids from the host plant for its antipredator defence. It is also a social insect that feeds and defends cooperatively in a group during the larval stage. In this master’s thesis, I studied the variation …
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Climate change in experimental ecology - The impact of warming and drought on key European tree, heath, and grassland species
… experiment using the leaf consumption of the forest pest Lymantria dispar (gypsy moth) as response parameter (manuscript 2). Surprisingly, "warming" and "drought" did not effect the leaf palatability. However, leaf palatability was negatively correlated with an increasing density of trichomes …
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Ecology of Mite Phoresy on Mountain Pine Beetles
Phoresy, a commensal interaction where smaller organisms utilize dispersive hosts for transmission to new habitats, is expected to produce positive effects for symbionts and no effects for hosts, yet negative and positive effects have been documented. This poses the question of whether phoresy is …