Index Catalog // ScholarsArchive@OSU

Aphid age and in-vector virus concentration as factors influencing pea enation mosaic virus transmission by the pea aphid

Creator:: Suharto, Hendarsih
Abstract:: The relationship between pea enation mosaic virus (PEMV) and aging pea aphids was studied. Although this research initially emphasized the relationship between the decline in the rate of PEMV transmission and the 'concentration of PEMV within pea aphids, aphid age was found to be the principle factor influencing transmission. Enzymelinked...
Resource Type:: Masters Thesis
Full Text:: the whole insect study, l-day-olds initially acquired A405 = 0.06 or 2.3 ng of PEMV while 8-day-olds

Differential transmission of strawberry mottle virus by Chaetosiphon thomas Hille Ris Lambers and Chaetosiphon fragaefolii (Cockerell)

Creator:: Eulensen, Gustav Egon
Abstract:: The transmission of strawberry mottle virus (SMV) to Fragaria vesca L. by Chaetosiphon thomasi and C. fragaefolii was studied to determine differences between the two species. Acquisition, inoculation, and retention phases of transmission were described. In all phases, C. fragaefolii was found to be the more efficient vector. Mean transmission...
Resource Type:: Masters Thesis
Full Text:: and Chaetosiphon fragaefolii (Cockerell) Abstract approved: Redacted for Privacy Richard G. Clarke

Life history of the Obscure Root Weevil, Sciopithes obscurus (Horn), on rhododendron

Creator:: Bell, Harry Thomas
Abstract:: The life history of the Obscure Root Weevil, Sciopithes obscurus (Horn), on Rhododendron was studied at four sites in the Willamette Valley. This research was conducted in an effort to provide information necessary to develop adequate methods to control this Curculionid pest on Rhododendron in the Willamette Valley. Five larval...
Resource Type:: Masters Thesis
Full Text:: committee, Drs. Clarke, Berry, Ticknor, Brooks, and Petersen, which was required to assist me in the

Examination of factors affecting larval mortality of the black vine weevil, Otiorhynchus sulcatus Fab., on container grown rhododendrons

Creator:: La Lone, Ralph Stanley
Abstract:: Two types of exogenous mortality factors, density-independent and density-dependent, were identified for the black vine weevil, Otiorhynchus sulcatus Fab., developing on container grown rhododendrons. The addition of the insecticide acephate, (O.S.- Dimethyl acetylphosphoramidothioate, Orthene®)75S) to the rhizosphere of rhododendrons in which larval O. sulcatus develop was categorized as a density-independent...
Resource Type:: Masters Thesis
Full Text:: . Clarke Two types of exogenous mortality factors, density-independent and density-dependent, were

Functional Comparison of Longline Oyster Aquaculture and Eelgrass (Zostera marina L.) Habitats Among Pacific Northwest Estuaries, USA

Creator:: Clarke, Larissa M.
Abstract:: Understanding the ecological role of Pacific oyster aquaculture (Crassostrea gigas) and eelgrass (Zostera marina L.) as important habitats in US Pacific Northwest estuaries is critical for management and regulatory decisions. The oyster aquaculture industry is currently restricted by regulations concerning impacts of their activities on Z. marina. This seagrass is...
Resource Type:: Masters Thesis
Full Text:: (Zostera marina L.) Habitats Among Pacific Northwest Estuaries, USA by Larissa M. Clarke

How Individual Transferable Quota Programs Affect Fishing Fleets

Creator:: Clarke, Robert L. Jr.
Abstract:: Some amount of of consolidation has occurred under almost every individual quote program that has been implemented. In the most severe cases, fishing fleets have lost over 70% of their vessels. Because of the devastating impact such losses can have on fishing communities, it is vital that the potential for...
Resource Type:: Capstone Project

A microdetermination of hydroxyl and acetate contents of sugars and glycosides

Creator:: Clarke, Ray Allen
Resource Type:: Masters Thesis
Full Text:: . of T. Zerewitinoff (32) based. upon the observation of L. Tschugaeff (29) involves the action of a

Mathematical modeling of selection and crossbreeding in beef cattle

Creator:: Clarke, Stephen Emil
Abstract:: A mathematical model was developed to simulate alternative selection and crossbreeding strategies for commercial beef production. Biological and economic constraints were selected to represent typical pasture production of calves in the Northwest. The crossbreeding study evaluated the relative economic efficiency of different 1) mating plans when sire breeds of several...
Resource Type:: Dissertation
Full Text:: calving season (L). As in previous work (Clarke et al., 1982), cull- ing cows which failed to wean a calf

The synthesis of amino alcohols derived from pyrimidines

Creator:: Clarke, Ray Allen
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS 0F Ray Allen Clarke for the

Defining one’s role in citizen science: an exploration of the roles, perceptions and outcomes of participation in citizen science activities

Creator:: Clarke, Karl
Abstract:: Citizen science (formally public participation in science research) has emerged in recent years as an innovative and interactive tool for engaging many diverse groups in science and research. Defined as the collaboration of science professionals and the public in science research, citizen science has tremendously improved the reach of science....
Resource Type:: Capstone Project
Full Text:: Microsoft Word - Karl C Clarke Final Capstone Project

ScholarsArchive@OSU

Aphid age and in-vector virus concentration as factors influencing pea enation mosaic virus transmission by the pea aphid

Differential transmission of strawberry mottle virus by Chaetosiphon thomas Hille Ris Lambers and Chaetosiphon fragaefolii (Cockerell)

Life history of the Obscure Root Weevil, Sciopithes obscurus (Horn), on rhododendron

Examination of factors affecting larval mortality of the black vine weevil, Otiorhynchus sulcatus Fab., on container grown rhododendrons

Functional Comparison of Longline Oyster Aquaculture and Eelgrass (Zostera marina L.) Habitats Among Pacific Northwest Estuaries, USA

How Individual Transferable Quota Programs Affect Fishing Fleets

A microdetermination of hydroxyl and acetate contents of sugars and glycosides

Mathematical modeling of selection and crossbreeding in beef cattle

The synthesis of amino alcohols derived from pyrimidines

Defining one’s role in citizen science: an exploration of the roles, perceptions and outcomes of participation in citizen science activities

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