Index Catalog // ScholarsArchive@OSU

Movement of zoospores of Phytophthora citricola in saturated porous media

Creator:: Ochiai, Naoyuki
Abstract:: The genus Phytophthora comprises numerous plant pathogens in both natural and managed ecosystems. For Phytophthora spp. that infect roots, dispersal occurs in soil water through a combination of advection and swimming of specialized motile propagules (zoospores). Specific biological and physico-chemical processes, however, remain poorly understood, due to difficulties in studying...
Resource Type:: Dissertation
Full Text:: approved: Maria I. Dragila Jennifer L. Parke The genus Phytophthora comprises numerous plant

Investigation of inheritance of glyphosate resistance and the mechanisms of glufosinate resistance in Italian ryegrass (Lolium perenne L. spp. multiflorum (Lam.) Husnot) populations

Creator:: Avila Garcia, Wilson Vidal
Abstract:: Italian ryegrass populations have been identified with evolved resistance to glyphosate in orchards with a history of glyphosate use. Two of these populations were selected to investigate the inheritance of glyphosate resistance. The mechanisms involved in the herbicide resistance were an altered target site for the population SF and reduced...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Wilson Vidal Avila Garcia for the degree of Doctor of

Water management effects on birdsfoot trefoil seed production

Creator:: García-Díaz, Carlos Alberto
Abstract:: There is no information available on water management of birdsfoot trefoil grown for seed. Information is also not available describing how to minimize seed losses due to shattering in order to obtain consistently high birdsfoot trefoil seed yields. The objectives of this research are to: (i) quantify crop water use,...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF Carlos Alberto Garcia -Diaz for the degree of Doctor of Philosophy in

Organic soil amendements (sic) : impacts on snap bean common root rot and soil quality

Creator:: Cespedes Leon, Maria Cecilia
Abstract:: Common root rot is a major disease of commercially grown snap bean (Phaseolus vulgaris L.) on the irrigated sandy soils of central Wisconsin. The objective of this study was to determine the relationships between soil properties and suppressiveness to common root rot of snap bean (causal agent Aphanomyces euteiches) in...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Maria Cecilia Cespedes Leon for

From atmospheric winds to fracture ventilation: Cause and effect

Creator:: Nachshon, Uri, Dragila, Maria, and Weisbrod, Noam
Abstract:: Vadose zone fractures and soil cracks exposed to the atmosphere have an impact on gas exchange processes at the Earth-atmosphere interface. In this study we explored and quantified the role of ground-surface winds on fracture ventilation. While the governing physical mechanisms that cause ventilation are relatively well understood, this is...
Resource Type:: Article
Full Text:: Maria Dragila,2 and Noam Weisbrod1 Received 25 October 2011; revised 2 April 2012; accepted 3 April

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

Creator:: Chacon, Stephany S.
Abstract:: The bottleneck in the turnover of soil organic matter (SOM) is the conversion of large molecular compounds into smaller compounds that can be transported through a cell membrane of a microbe for processing. Once inside the cell, organic compounds can be converted into biomass or be respired. The microbial depolymerization...
Resource Type:: Dissertation
Full Text:: completing my work I’d like to thank my committee Dr. David Myrold, Dr. Peter Bottomley, Dr. Maria Dragila

Towards a national map of soil liquefaction susceptibility : modeling with heuristic and geotechnical methods

Creator:: Lindsley, Adam E.
Abstract:: This study investigates the use of predictive mapping techniques as well as geotechnical criteria in developing a multiregional soil liquefaction model and subsequent maps. The maps were produced using National Cooperative Soil Survey data, in the gSSURGO format, combined with soil liquefaction data gathered from studies, articles, and traditional seismic...
Resource Type:: Masters Thesis
Full Text:: challenging project. Thank you also to my committee members, Maria Dragila, John Baham, and Michael Olsen

The Biology and ecology of weeping alkaligrass (Puccinellia distans) and Nuttall’s alkaligrass (Puccinellia nuttalliana)

Creator:: Tarasoff, Catherine
Abstract:: Weeping alkaligrass (Puccinellia distans) and Nuttall’s alkaligrass (Puccinellia nuttalliana) infest Kentucky bluegrass seed fields of eastern Oregon. Weeping alkaligrass is an introduced species from Eurasia, whereas Nuttall’s alkaligrass is native to semi arid environments of western North America. These species are often referred to collectively as ‘alkaligrass’; however, for farmers...
Resource Type:: Dissertation
Full Text:: summer weekends hiking the Wallowas. I would like to thank my graduate committee of Dr. Maria Dragila

Modeling Survival of Soilborne Phytophthora spp. and Characterizing Microbial Communities in Response to Soil Solarization and Biocontrol Amendment in Container Nursery Beds

Creator:: Funahashi, Fumiaki
Abstract:: In horticultural nurseries for container-grown plants, production and sales have been threatened by the presence of a quarantined plant pathogen, Phytophthora ramorum (causal agent of sudden oak death). Infested nursery beds are an important source of P. ramorum, which can initiate disease through movement with surface water to infect roots...
Resource Type:: Dissertation
Full Text:: within my own interests and strengths. I extend this gratitude to my committee member, Maria Dragila

Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability

Creator:: Chaer, Guilherme M.
Abstract:: The objectives of this thesis were to evaluate the responses of soil microbial communities to physical and chemical disturbances, and associate these responses with soil functional stability and changes in soil quality. The first study consisted of application of heat shocks (HS) to soils with contrasting land use history to...
Resource Type:: Dissertation
Full Text:: : David Myrold, Maria Dragila, Roger Ely, and Anita Azarenko. Thanks to the CSS staff, in special to

ScholarsArchive@OSU

Movement of zoospores of Phytophthora citricola in saturated porous media

Investigation of inheritance of glyphosate resistance and the mechanisms of glufosinate resistance in Italian ryegrass (Lolium perenne L. spp. multiflorum (Lam.) Husnot) populations

Water management effects on birdsfoot trefoil seed production

Organic soil amendements (sic) : impacts on snap bean common root rot and soil quality

From atmospheric winds to fracture ventilation: Cause and effect

Mineral Surfaces as Agents of Environmental Proteolysis: Mechanisms and Controls

Towards a national map of soil liquefaction susceptibility : modeling with heuristic and geotechnical methods

The Biology and ecology of weeping alkaligrass (Puccinellia distans) and Nuttall’s alkaligrass (Puccinellia nuttalliana)

Modeling Survival of Soilborne Phytophthora spp. and Characterizing Microbial Communities in Response to Soil Solarization and Biocontrol Amendment in Container Nursery Beds

Response of soil microbial communities to physical and chemical disturbances: implications for soil quality and land use sustainability

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