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 21 for “"gypsy moth"”.
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Bioeconomics Of Invasive Species: The Gypsy Moth
… and management of an invasive species. It uses gypsy moth as an example to examine the optimal control of invasive species. This dissertation is composed of five chapters. Chapter one provides an overview of the current bioeconomic research and the main questions I want to address in this …
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Mating Success in Low-Density Gypsy Moth Populations
… mating disruption on the mating success of the gypsy moth, Lymantria dispar (L), in low-density populations. The gypsy moth is an insect pest of hardwood forests in many regions of the world. The discovery of the sex pheromone disparlure (cis-7,8-epoxy-2-methyloctadecane) produced by females …
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Gypsy moth egg development: a model of phenological events
A phenological model of gypsy moth egg development is proposed that distinguishes three phases of egg development, prediapause, diapause and postdiapause. A technique of measuring respiration rates of individual eggs was developed and respiration rate was used as a physiological variable to …
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Egg mass sampling plans for gypsy moth management programs
The goal of this research was to develop gypsy moth egg mass sampling plans that reflect the influence of habitat, changes in egg mass distribution, and provide populations densities or density categories for making control decisions. Sequential egg mass sampling plans for gypsy moth management …
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Ecological niche responses of small mammals to gypsy moth disturbance
… oak dominated sites at four different stages of gypsy moth disturbance: a high tree mortality site, a disturbance in process site, a disturbance recovery site, and an undisturbed reference site. More specifically, the study was designed to identify changes in habitat structure that would …
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Forest edges enhance mate-finding in the European gypsy moth, Lymantria dispar
… in an invasive defoliator, the European gypsy moth. Adult European gypsy moth males locate mates by following pheromones released by flightless females. Reduced mate-finding was expected in fields and near forest edges based on geographic variation in invasion rates and pheromone plume …
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Influence of gypsy moth induced oak mortality on a black bear population
… in Shenandoah National Park (SNP), Virginia to gypsy moth (Lymantria dispar) induced oak (Quercus spp.) mortality. Oak species composed >50% of the forest canopy of SNP, and oak mortality rates ranged from 1- ≥48%. I compared black bear population dynamics, food habits, movements and habitat use …
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Indirect effects between deer, mice, and the gypsy moth in a forest community
… species that deer may indirectly affect is the gypsy moth, whose pupae are preyed upon by the white-footed mouse. Through alterations to understory habitat of mice, deer may reduce mouse predation on gypsy moth pupae. In this study, I tested for indirect effects of deer on the gypsy moth by …
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Response of black bears to gypsy moth infestation in Shenandoah National Park, Virginia
The effects of gypsy moth infestation on the Shenandoah National Park (SNP) black bear population and habitat were studied during 1985 - 1991 by comparing radio telemetry, population, and behavioral data from preinfestation years (1982 - 1986) and years with extensive defoliation (1987 - 1991). …
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Mono-Oxygenase Activity and Nutritional Ecology of Larvae of the Gypsy Moth, Lymantria Dispar
… to be polyphagous herbivores, larvae of the gypsy moth, Lymantria dispar, exhibit certain host plant preferences: oak species are favored by all larval instars; pine may serve as an alternate host for older instar larvae, but first instar larvae suffer 100% mortality on pine (Barbosa et al., …
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Quantification and use of pheromone-baited milk-carton traps to monitor gypsy moth populations
… the understanding of the dynamics of male gypsy moth-pheromone trap interactions and the ecological factors that influence moth capture in pheromone traps. Defoliation, the most obvious expression of high density gypsy moth populations, may have a significant influence on gypsy moth …
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Short-term effects of defoliation by gypsy moth larvae on Appalachian headwater streams in Virginia
… short-term effects of riparian defoliation by gypsy moth larvae on three aspects of headwater stream ecology, water quality, benthic macroinvertebrate community structure, and benthic macroinvertebrate function (expressed as secondary production). The experimental design was to compare …
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Effects of European Gypsy Moth Defoliation in Mixed Pine-Hardwood Stands in the Atlantic Coastal Plain
As populations of the European gypsy moth (Lymantria dispar L.) move into the southeast, laboratory studies indicate that the potential exists for defoliation and possible tree mortality in mixed pine-hardwood stands. This dissertation describes a field study that was initiated to determine the …
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Design and development of an instructional unit on integrated pest management (IPM): using the gypsy moth (Lymantria dispar (L.)) problem to teach IPM
… of integrated pest management (IPM) and the gypsy moth (Lymantria dispar [L.]) problem in Virginia. Construction of the guide followed three phases—design, development, and evaluation—of the Instructional Development Institute (IDI) model of instructional design. Lessons were developed using …
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Effects of nitrogen and water on growth, photosynthesis, and leaf properties of deciduous tree species with consequences for gypsy moth herbivory
… response was determined and feeding trials with gypsy moth larvae were conducted with both birch species. I found that the effects of nitrogen on growth and biomass allocation depended on species, while water had no significant effect on these measures. Both birch species showed increased total …
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Modeling the impact of gypsy moth defoliation in individual tree mortality and basal area growth of northern hardwoods of central Pennsylvania
… Pennsylvania that had been defoliated by the gypsy moth. Defoliation was estimated to the nearest ten percent for individual trees. Other variables used for prediction included stand basal area and an individual-tree relative basal area index. Success ranged from no fit for three of the …
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Effects of gypsy moth defoliation on acorn production and viability, litterfall, and litter layer depth and biomass in north-central Virginia and western Maryland
The effects of gypsy moth defoliation on acorn production (the seed source for oak regeneration), and the forest floor regeneration environment were investigated. Parameters measured included: acorn quantity, weight, development, and viability; litterfall; and forest floor depth and biomass. …
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Distribution and Dynamics of the Evergreen Understory Layer in Central Appalachian Highland Forests
… that topo-edaphic gradients and intensity of gypsy moth defoliation were associated with differences in the distribution of these two shrub species within and between the two study areas, and midstory volume was significantly lower where evergreen understory coverage was continuous. Third, …
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Genomics of Butterflies
… Second, we sequence and analyze the genome of a gypsy moth, a notorious pest accidentally introduced to American from Europe and hypothesize about the differences in flight capacity of different moth populations. Third, we study speciation in Texas butterflies and uncover general criteria and …
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Premigratory movements of a long-distance migratory species: the Wood Thrush (Hylocichla mustelina)
… sites at the edge of forested areas [52%], (2) gypsy moth (Lymantria dispar) damaged deciduous forest [21.8%], (3)Virginia pine (Pinus virginianus) forest that had a heavy understory of young deciduous trees and an open canopy [15.6%], and (4) mature mixed forest [10.6%]. Most fledglings(73%) …
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