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Effects Of Larval Food Plants On The Gypsy Moth Lymantria Dispar L And Implications For Its Population Dynamics
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Book Synopsis Effects of Larval Food Plants on the Gypsy Moth, Lymantria Dispar L., and Implications for Its Population Dynamics by : Judith Anne Hough
Download or read book Effects of Larval Food Plants on the Gypsy Moth, Lymantria Dispar L., and Implications for Its Population Dynamics written by Judith Anne Hough and published by . This book was released on 1977 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effects of Switching Host Plants on the Performance of the Gypsy Moth, Lymantria Dispar (L.) (Lepidoptera: Lymantriidae) by : Jennifer Lynn Stoyenoff
Download or read book The Effects of Switching Host Plants on the Performance of the Gypsy Moth, Lymantria Dispar (L.) (Lepidoptera: Lymantriidae) written by Jennifer Lynn Stoyenoff and published by . This book was released on 1990 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Temperature and Host Distribution on Gypsy Moth Growth Rates Along Its Expanding Population Front by : Riley Metz
Download or read book Effects of Temperature and Host Distribution on Gypsy Moth Growth Rates Along Its Expanding Population Front written by Riley Metz and published by . This book was released on 2017 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: The gypsy moth, Lymantria dispar (L.), has been a major pest species in North American forests for >100 years and has caused defoliation on >369,000 km2 since 1924. Due to the economic and ecological consequences of gypsy moth, many aspects of its population biology and ecology have been studied. However, much prior work has focused at local spatial scales and in established outbreaking populations. In contrast, gypsy moth invasion dynamics are understudied in newly established populations and across landscape scales. I first analyzed the effect of sub- and supraoptimal temperatures on nascent gypsy moth population growth rates, and the spatial patterns of growth rates, along the expanding invasion front in the eastern United States. Second, I quantified the relationship between primary and secondary host plant fragmentation and gypsy moth population growth rates along the expanding invasion front. The data from this study indicate that there are geographical differences in how temperature and host fragmentation is affecting gypsy moth growth rates, and the spatial structure of those growth rates within expanding populations along the leading edge of the invasion front. Furthermore, the results from this study emphasize the important role that secondary hosts play in establishing populations. The results from this study could help in the development of more accurate risk assessment models pertaining to gypsy moth invasion potential.
Book Synopsis Gypsy Moth Management in the United States: a Cooperative Approach by :
Download or read book Gypsy Moth Management in the United States: a Cooperative Approach written by and published by . This book was released on 1995 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Gypsy Moth Management in the United States by : United States. Forest Service
Download or read book Gypsy Moth Management in the United States written by United States. Forest Service and published by . This book was released on 1995 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Population Dynamics of the Gypsy Moth by : Robert W. Campbell
Download or read book Population Dynamics of the Gypsy Moth written by Robert W. Campbell and published by . This book was released on 1978 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Ecology Of Nucleopolyhedrovirus Transmission In The Gypsy Moth (Lymantria Dispar) by : James Robert Reilly
Download or read book The Ecology Of Nucleopolyhedrovirus Transmission In The Gypsy Moth (Lymantria Dispar) written by James Robert Reilly and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Insect nucleopolyhedroviruses (NPVs) are among the most important pathogens that regulate insect populations. Although these pathogens have been the subject of a great deal of research, many aspects of their transmission remain poorly understood. The transmission of NPV is controlled by a complex set of interactions between host, virus, and the environment. I investigated the effects of three different factors on the transmission of LdNPV in the gypsy moth, (Lymantria dispar), using laboratory and field experiments, DNA analysis, and mathematical modeling. The three effects examined were: 1) the effect of density-dependent disease resistance, 2) the effect of vectoring by avian predators, and 3) the potential occurrence of vertical transmission of the virus. My main results are as follows: 1) The resistance of gypsy moth larvae to NPV decreased as larval density increased, perhaps due to the stress associated with high densities, and this relationship is predicted to have a stabilizing effect on population dynamics. 2) In aviary cage experiments, bird species showed differential effectiveness in spreading the virus from infected to healthy larvae on a local scale. This difference was due more to differences in prey processing behaviors among the birds than to differences in the amount of NPV or speed at which NPV passed through the bird guts. The highest level of transmission was achieved by red-eyed vireos, largely because of their strategy of beating larvae against a branch before ingestion, resulting in rupture of the larval cuticle and scattering of viral occlusion bodies. 3) We found no evidence for vertical transmission of lethal NPV infection in the gypsy moth. Although low levels of virus were detected in the tissues of adult female moths by real-time PCR, there was no organ that showed consistently positive levels of NPV. Furthermore, the putative virus from female tissues was not infectious to larvae in our studies, and therefore may represent either latent virus or non-occluded virions. Together, these results contribute significantly to our understanding of the processes governing NPV transmission in gypsy moths and are directly relevant to the host-pathogen dynamics of many other systems.
Book Synopsis European Gypsy Moth (Lymantria Dispar L.) Outbreaks by : Christopher Bryn Davidson
Download or read book European Gypsy Moth (Lymantria Dispar L.) Outbreaks written by Christopher Bryn Davidson and published by . This book was released on 2001 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report NE written by and published by . This book was released on 1980 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Behavior and Development of Larval Gypsy Moth, Lymantria Dispar (L.), on Trees of the Upper Great Lakes Forests by : David Berkeley Roden
Download or read book Behavior and Development of Larval Gypsy Moth, Lymantria Dispar (L.), on Trees of the Upper Great Lakes Forests written by David Berkeley Roden and published by . This book was released on 1992 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Early Larval Dispersal of Gypsy Moth (Lymantria Dispar L.) by : Andrea L. Diss
Download or read book Early Larval Dispersal of Gypsy Moth (Lymantria Dispar L.) written by Andrea L. Diss and published by . This book was released on 1996 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Laboratory Rearing on Gypsy Moth (Lepidoptera: Lymantriidae) by : Melody A. Keena
Download or read book Effects of Laboratory Rearing on Gypsy Moth (Lepidoptera: Lymantriidae) written by Melody A. Keena and published by . This book was released on 1994 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Gypsy Moth and Its Natural Enemies by : Robert W. Campbell
Download or read book The Gypsy Moth and Its Natural Enemies written by Robert W. Campbell and published by . This book was released on 1975 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Patterns of gypsy moth behavior are described, especially those related to population density. Natural mortality-causing factors that operate against this insect are also described. Several agents kill subadult male and female gypsy moths at different rates. Major determinants of year-to-year changes in gypsy moth numbers are described.
Book Synopsis Ecology and Influence of Bacteria in Gypsy Moth - Plant Interactions by :
Download or read book Ecology and Influence of Bacteria in Gypsy Moth - Plant Interactions written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microbial symbioses are ubiquitous among insects and plants, but their roles in mediating interactions between them remain poorly understood. The manners in which bacterial symbionts of many insects are acquired, or may be influenced by plant chemical defenses are central to these relationships. Gypsy moth (Lymantria dispar L.) is a polyphagous leaf-feeding Lepidoptera. I assessed the contributions of egg-mass and foliar sources of bacteria on larval midgut communities, using culture-independent analyses. Laboratory-reared egg masses had a very low diversity of bacteria, while field-collected populations were highly diverse. Despite differences in egg mass-associated bacteria, larval midguts converged after extended feeding. Larval bacterial communities resembled those of the foliage they consumed, but also differed in the abundances of some members. This indicates various foliar-acquired bacteria respond differently to midgut conditions. To identify roles of midgut bacteria on gypsy moth performance, I used artificial diets containing phenolic glycosides, the principal chemical defense of trembling aspen (Populus tremuloides). Larvae were fed bacteria from aspen leaves, field-collected fifth-instar larvae, or mock controls. Larvae inoculated with bacteria from aspen grew larger when phenolic glycosides were included in diet, but not when they were absent. Effects were post-ingestive, as consumption was unaffected. Specific bacteria in larval midguts were differentially affected: Ralstonia decreased and Acinetobacter increased, when phenolic glycosides were added. Bacterial communities demonstrated high capabilities of degrading phenolic glycosides. Among individual members, Acinetobacter most strongly reduced their concentrations. Aspen genotype had little effect on foliar communities, despite widely differing chemical compositions. However, midguts from gypsy moth larvae feeding on trees with different chemical concentrations were strongly influenced by the ratio of phenolic glycosides to condensed tannins in foliage. The limited effects of foliar chemistry on bacterial communities, coupled with the strong effects of these chemicals on bacteria within larval midguts following ingestion, indicate that partitioning of defense chemicals in plant cell vacuoles minimizes effects on phyllosphere residents, but, feeding ruptures these barriers, causing strong interactions between foliar compounds and bacteria within midguts. Overall, these results broaden our understanding of plant-insect-microbe relationships, and identify important interactions among these members.
Book Synopsis Gypsy Moth Management in the United States: Chapters 1-9 and appendixes A-E by :
Download or read book Gypsy Moth Management in the United States: Chapters 1-9 and appendixes A-E written by and published by . This book was released on 1995 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Population Ecology of the Gypsy Moth, Porthetria Dispar L. (Lepidoptera by : Henry Alver Bess
Download or read book Population Ecology of the Gypsy Moth, Porthetria Dispar L. (Lepidoptera written by Henry Alver Bess and published by Hassell Street Press. This book was released on 2021-09-09 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important and is part of the knowledge base of civilization as we know it. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. To ensure a quality reading experience, this work has been proofread and republished using a format that seamlessly blends the original graphical elements with text in an easy-to-read typeface. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Book Synopsis Gypsy Moth Management in the United States by :
Download or read book Gypsy Moth Management in the United States written by and published by . This book was released on 1995 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
