Index Catalog // ScholarsArchive@OSU

The relative impact of single vs. multiple agents on the biological control of Tansy ragwort (Senecio jacobaea)

Creator:: James, Rosalind R.
Abstract:: Field experiments were done to test the relative effectiveness of single and multiple biological control agents in reducing weed populations using two insects, the cinnabar moth, Tvria iacobaeae (L.), and the ragwort flea beetle, Lonqitarsus iacobaeae (Waterhouse). These two insects were released for biological control of the biennial weed tansy...
Resource Type:: Masters Thesis
Full Text:: committee: Mark Wilson for his helpful comments, and Norman Anderson for our many discussions and his

Age and growth of cutthroat trout, Salmo clarki clarki Richardson, in the Rogue River, Oregon

Creator:: Tomasson, Tumi
Resource Type:: Masters Thesis
Full Text:: !! His guidance during the last two years is much appreciated. Dr.'s Jim Hall and Norman Anderson

Adequacy of hand-defoliation of tansy ragwort (Senecio jacobaea L.) as a simulation of defoliation by cinnabar moth (Tyria jacobaeae (L.))

Creator:: Henneberger, Diane
Abstract:: Hand-defoliation was evaluated for its ability to simulate herbivory by cinnabar moth larvae, Tyria jacobaeae (L.) (Arctiidae) on the weed tansy ragwort, Senecio jacobaea L. (Asteraceae). The evaluation was done on a field population of flowering ragwort, for three different timings (early, middle, and late season) of damage. In the...
Resource Type:: Masters Thesis
Full Text:: useful discussion and comments. I want to thank also the other members of my committee, Norman H

Marine herbivore-plant interactions : the feeding ecology of the sea slug Placida dendritica

Creator:: Trowbridge, Cynthia D.
Abstract:: The feeding ecology of a common temperate mesoherbivore, the oligophagous sea slug Placida dendritica (Gastropoda: Opisthobranchia: Ascoglossa), was examined from April 1985 to June 1989. Along the central coast of Oregon, Placida consumed three host species: the low intertidal green algae Codium setchellii, C. fragile, and Bryopsis corticulans. Individual slugs...
Resource Type:: Dissertation
Full Text:: members of my committee--Mark Hixon and Norman Anderson--for being reasonable and helpful people

Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

Creator:: DiLeone, Julie A.
Abstract:: This study quantified the frequency of simple versus complex races of Puccinia striiformis Westend. in mixtures of wheat cultivars possessing different race-specific resistance genes. A simple race of a pathogen can infect only one component, and a complex race of the pathogen can infect two or more components of an...
Resource Type:: Masters Thesis
Full Text:: thank my committee members, Drs. Ken Johnson, Warren Kronstad, and Norman Anderson for helping me to

The development and maintenance of stream community structure and organization

Creator:: Wevers, Mary Jo
Abstract:: The goal of this study was to better understand stream communities through a perspective that might make their structure, organization, and development more understandable. This goal was approached through the following objectives: 1. To determine the assemblages of stream organisms and define subsystems within a stream community. 2. To explain...
Resource Type:: Masters Thesis
Full Text:: this project. I wish to thank Dr. Kenneth W. Cummins, Dr. Norman H. Anderson, and Dr. Robert L

The effect of age, sex and eye-hand coordination on the ability to predict the readiness of elementary students to learn an effective dental flossing technique

Creator:: Terhune, James Albert
Abstract:: The purpose of this study was to investigate the relationships between age, sex, eye-hand coordination, the time it takes individuals to learn how to manipulate dental floss between all of their teeth, and the time it takes individuals to learn how to effectively clean their teeth with dental floss. The...
Resource Type:: Dissertation
Full Text:: , Dr. Dave Phelps, Professor of Health Education, and Dr. Norman Anderson, Professor of Entomology

A revision of the genus Notiphila Fallén (Diptera:Ephydridae) from America north of Mexico

Creator:: Mathis, Wayne N.
Abstract:: The North American species of the shore fly genus Notiphila Fallen were taxonomically revised. Over 13,000 specimens were examined from throughout the Nearctic Region and information relating to the biology of many species occurring in the West was gathered from both field and laboratory studies. Previously used characters were reevaluated;...
Resource Type:: Dissertation
Full Text:: efforts are very much appreciated. I also wish to thank the members of my thesis committee, Drs. Norman

The Tabanidae (Diptera) of Oregon

Creator:: Mahmoud, Ali Ahmed
Abstract:: Fifty species and subspecies and six varieties in eight genera of the family Tabanidae are recognized from Oregon. The following genera are represented in Oregon: Apatolestes Williston, Pilimas Brennan, Stonemyia Brennan, Silvius Meigen, Chrysops Meigen, Atylotus Osten Sacken, Hybomitra Enderlein and Tabanus Linnaeus. Adults and larvae were collected from various...
Resource Type:: Dissertation
Full Text:: available to me. I thank Dr. Norman H. Anderson, Dr. Robert L. Goulding, Dr. James D. Hall, Dr. Paula

A revision of the genus Deraeocoris Kirschbaum (Heteroptera:Miridae) from western America north of Mexico

Creator:: Razafimahatratra, Vincent de Paul
Abstract:: The genus Deraeocoris Kirschbaum of western America north of Mexico was revised. Approximately 10,000 specimens from the Nearctic Region were examined. Taxonomic characters used by previous authors were reevaluated. In addition to the male parameres, the male vesica and the female posterior wall of the bursa copulatrix and sclerotized rings...
Resource Type:: Dissertation
Full Text:: . Allen, Norman H. Anderson, Kenton L. Chambers, Robert E. Frenkel and Paul Oman. I express my thanks to

ScholarsArchive@OSU

The relative impact of single vs. multiple agents on the biological control of Tansy ragwort (Senecio jacobaea)

Age and growth of cutthroat trout, Salmo clarki clarki Richardson, in the Rogue River, Oregon

Adequacy of hand-defoliation of tansy ragwort (Senecio jacobaea L.) as a simulation of defoliation by cinnabar moth (Tyria jacobaeae (L.))

Marine herbivore-plant interactions : the feeding ecology of the sea slug Placida dendritica

Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

The development and maintenance of stream community structure and organization

The effect of age, sex and eye-hand coordination on the ability to predict the readiness of elementary students to learn an effective dental flossing technique

A revision of the genus Notiphila Fallén (Diptera:Ephydridae) from America north of Mexico

The Tabanidae (Diptera) of Oregon

A revision of the genus Deraeocoris Kirschbaum (Heteroptera:Miridae) from western America north of Mexico

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