Index Catalog // ScholarsArchive@OSU

Determining the Minimum Treatment Area and Importance of Soil Irrigation for Solarizing Soil Infested with Phytophthora spp.

Creator:: Bennett, Logan L.
Abstract:: Nurseries are an important part of the agriculture industry of the United States. The nursery industry provides ornamental, forest, restoration and specialty products to many markets in N. America. The disease sudden oak death, caused by Phytophthora ramorum, has devastating environmental and economic impacts on forested land, the urban-forest interface,...
Resource Type:: Masters Thesis
Full Text:: : ____________________________________________________ Jennifer L. Parke Nurseries are an important part of the agriculture industry of the

Soil Solarization in Pacific Northwest Tree Seedling Nurseries: Effects on Soilborne Plant Pathogens, Soil Nutrients and the Soil Microbiome

Creator:: Weidman, Clara S.
Abstract:: Nursery and greenhouse products are economically important agricultural commodities for Oregon and Washington. Nursery crops including tree seedlings can be damaged or killed by soilborne plant pathogens, which can be challenging to manage because of their persistence in soil and limited options for control. Soil solarization is a pre-planting soil...
Resource Type:: Masters Thesis
Full Text:: :_____________________________________________________ Jennifer L. Parke Nursery and greenhouse products are economically important

Phytophthora ramorum within an Oregon tanoak forest : quantifying inoculum within canopy throughfall vs. soil splash

Creator:: Benemann, Silvia, E.
Abstract:: Phytophthora ramorum continues to cause extensive mortality of tanoaks in southwestern Oregon. Rain readily washes inoculum down through the canopy, causing new infections on the lower parts of the tree and neighboring host plants. Although this aspect of dispersal is well understood, the relative importance of infested soil and leaf...
Resource Type:: Masters Thesis
Full Text:: : ______________________________________________________ Jennifer L. Parke Phytophthora ramorum continues to cause extensive mortality of tanoaks in

Viability and infective potential of Phytophthora pini zoospores in a recirculating irrigation system

Creator:: Shay, Sarah D.
Abstract:: Phytophthora pini Leonian, recently re-established from P. citricola I, is a pathogen with a wide range of forest and nursery hosts. It causes foliar infections in horticultural nurseries in Oregon, where recirculating irrigation systems are common. Increased use of recirculating irrigation systems may contribute to disease caused by waterborne plant...
Resource Type:: Masters Thesis
Full Text:: pini Zoospores in a Recirculating Irrigation System Abstract approved: Jennifer L. Parke

Potential susceptibility of tanoak associated and rare ericaceous plant species of southwestern Oregon to Phytophthora ramorum

Creator:: Zanzot, James W.
Abstract:: The sudden oak death pathogen, Phytophthora ramorum, is present in southwestern Oregon, and while an eradication effort is underway, the potential impact of the polyphagous pathogen on surrounding vegetation is unknown. Plant communities in the area are substantially different from those affected in California, although tanoak (Lithocarpus densiflorus), evergreen huckleberry...
Resource Type:: Masters Thesis
Full Text:: ramorum Abstract approved: Jennifer L. Parke The sudden oak death pathogen, Phytophthora ramorum, is

Response of Striga-susceptible and Striga-resistant sorghum genotypes to soil phosphorus and colonization by an arbuscular mycorrhizal fungus

Creator:: Leytem, Alicia B.
Abstract:: Striga, a genus of obligate parasitic weeds in the family Orobanchaceae, has been identified as the most important biological factor limiting agricultural productivity in sub-Saharan Africa. Germination of Striga seeds is triggered by strigolactone root exudates from host plants. Strigolactones also induce hyphal branching in arbuscular mycorrhizal (AM) fungi, which...
Resource Type:: Masters Thesis
Full Text:: Arbuscular Mycorrhizal Fungus Abstract approved: Jennifer L. Parke Striga

Pathways of infection of Phytophthora ramorum in rhododendron

Creator:: Lewis, Carrie D.
Abstract:: Phytophthora ramorum, a plant pathogen, is the cause of sudden oak death and ramorum blight and shoot die-back. It has a wide host range including many native forest species and common nursery plants. The lack of knowledge regarding infection biology of P. ramorum limits our understanding of its ecology and...
Resource Type:: Masters Thesis

Susceptibility of coast redwood seedlings to Phytophthora ramorum

Creator:: Lucas, Sunny L.
Abstract:: Coast redwood (Sequoia sempervirens) (D. Don) Endl. is a host for Phytophthora ramorum but it was unclear if the pathogen represents a significant disease risk to this tree species. In this study the susceptibility of coast redwood seedlings and the likelihood of sporulation on redwood were examined. Two methods were...
Resource Type:: Masters Thesis
Full Text:: ______________________________________________________________________ Jennifer L. Parke Coast redwood (Sequoia sempervirens) (D. Don) Endl. is a host for

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:: : ______________________________________________________ Jennifer L. Parke David D. Myrold In horticultural nurseries

Detection of the Burkholderia cepacia complex in soil environments

Creator:: Miller, Suzanne C. McKenzie
Abstract:: Burkholderia cepacia complex (Bcc) bacteria reside in soil, plant rhizospheres, and water, but the prevalence of Bcc in outdoor environments is not clear. In this study, we sampled a variety of soil and rhizosphere environments with which people may have contact: playgrounds, athletic fields, parks, hiking trails, residential yards and...
Resource Type:: Masters Thesis
Full Text:: Burkholderia cepacia Complex in Soil Environments. Abstract approved: David D. Myrold Jennifer L. Parke

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

Soil solarization at an organic farm: effects on weed emergence, soil nutrients and soil microbial communities

Creator:: Trammell, Caleb, Eberhart, Joyce, and Parke, Jennifer L.
Abstract:: Weed management is one of the main challenges for organic agriculture. Soil solarization has been shown to be an effective mitigation strategy for weeds and soil borne plant pathogens but few studies have been conducted in cooler climates such as the Pacific Northwest.
Resource Type:: Poster

Soil solarization effects on plant growth variables of field-grown tree saplings

Creator:: Fraher, Simon
Abstract:: Solarization could be an alternative to chemical controls for soil pathogens and weeds, and it may also influence plant growth factors. Biomass, shoot length, and AMF colonization were examined in red oak (Quercus rubra), Mazzard cherry (Prunus avium), and hawthorn (Crataegus monogyna) at J. Frank Schmidt & Son Co. nursery...
Resource Type:: Honors College Thesis

Relative heat sensitivities and the potential for soil solarization to remediate nursery beds infested with Phytophthora spp.

Creator:: Weidman, Clara Suzanne
Abstract:: Infestations of container nursery beds by Phytophthora spp. can be persistent and costly. One method of disinfestation that does not require the use of chemicals is soil solarization, which captures energy from the sun to heat soil and thermally inactivate target pathogens. In laboratory temperature gradient experiments, I investigated the...
Resource Type:: Undergraduate Thesis
Full Text:: : _________________________________ ________________ Jennifer Parke, Crop and Soil Science

Soil quality assessment of Willamette Valley soils and root colonization potential by arbuscular mycorrhizal fungi

Creator:: Allen, Natalie M.
Abstract:: Interest in measuring soil quality continues to increase worldwide in view of demands on land productivity and the necessity to preserve soil resources, yet identification of suitable indicators for soil quality assessment is still evolving. This study adapted 10 biological, physical, and chemical indicators of soil quality identified by the...
Resource Type:: Masters Thesis
Full Text:: Abstract approved: ______________________________________________________ Jennifer L. Parke

The effects of Phytophthora ramorum stem inoculation on aspects of tanoak physiology and xylem function in saplings and seedlings

Creator:: Stamm, Elizabeth A.
Abstract:: Phytophthora ramorum, an oomycete plant pathogen, is the causal agent of sudden oak death, a serious disease of Fagaceous trees in California and Oregon over the last decade. Tanoak (Notholithocarpus densiflorus) is one of the most susceptible host species, but the cause of host mortality is poorly understood. Previous research...
Resource Type:: Masters Thesis
Full Text::   Tanoak Physiology and Xylem Function in Saplings and Seedlings    Abstract approved    Jennifer L

The effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in tanoak sapwood

Creator:: Collins, Bradley R.
Abstract:: Tanoak (Lithocarpus densiflorus), along with some other members of Fagaceae, are susceptible to sudden oak death caused by the oomycete Phytophthora ramorum. Symptoms of the disease include dying crowns, bleeding cankers, and eventually death of infected trees. The cause of mortality is not well understood, but recent research indicates that...
Resource Type:: Masters Thesis
Full Text:: _____________________________________________________________________ Jennifer L. Parke Tanoak (Lithocarpus densiflorus), along with some other members of

Soil solarization effects on plant growth variables of field-grown tree saplings

Creator:: Fraher, Simon
Abstract:: Soil solarization has been used throughout the world, but its effect on plant growth variables in ornamental tree saplings in the Willamette Valley are not well documented. Solarization could be an alternative to chemical controls for soil pathogens and weeds, and it may also influence plant growth factors. This study...
Resource Type:: Honors College Thesis

The Role of Mesenchymal Stem Cells in Anti-Tumor Immunity of Canine Osteosarcoma

Creator:: Allende, Carolina M.
Abstract:: Osteosarcoma (OS) is the most common primary bone tumor in both humans and dogs, occurring approximately 10 times more frequently in dogs. OS is a highly aggressive neoplasm with evidence of metastasis often found at the time of diagnosis. Long-term survival in afflicted dogs continues to remain low despite aggressive...
Resource Type:: Masters Thesis
Full Text:: Osteosarcoma Abstract approved: _____________________ Jennifer Johns Abstract

Particulate Trace Metal Fluxes in the Western Arabian Sea and Their Links to Marine Productivity

Creator:: Flannery, Kelly M.
Abstract:: Many trace elements (e.g., Zn, Cd, Mo) are essential phytoplankton micronutrients, making them crucial to the marine ecosystem and ultimately the carbon cycle. Because of this association trace metals are also utilized in paleoceanographic studies (e.g., Mo, Cd). However, not much is known about what controls the cycling of these...
Resource Type:: Masters Thesis
Full Text:: Western Arabian Sea and Their Links to Marine Productivity Abstract approved: Jennifer L. McKay

ScholarsArchive@OSU

Determining the Minimum Treatment Area and Importance of Soil Irrigation for Solarizing Soil Infested with Phytophthora spp.

Soil Solarization in Pacific Northwest Tree Seedling Nurseries: Effects on Soilborne Plant Pathogens, Soil Nutrients and the Soil Microbiome

Phytophthora ramorum within an Oregon tanoak forest : quantifying inoculum within canopy throughfall vs. soil splash

Viability and infective potential of Phytophthora pini zoospores in a recirculating irrigation system

Potential susceptibility of tanoak associated and rare ericaceous plant species of southwestern Oregon to Phytophthora ramorum

Response of Striga-susceptible and Striga-resistant sorghum genotypes to soil phosphorus and colonization by an arbuscular mycorrhizal fungus

Pathways of infection of Phytophthora ramorum in rhododendron

Susceptibility of coast redwood seedlings to Phytophthora ramorum

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

Detection of the Burkholderia cepacia complex in soil environments

Movement of zoospores of Phytophthora citricola in saturated porous media

Soil solarization at an organic farm: effects on weed emergence, soil nutrients and soil microbial communities

Soil solarization effects on plant growth variables of field-grown tree saplings

Relative heat sensitivities and the potential for soil solarization to remediate nursery beds infested with Phytophthora spp.

Soil quality assessment of Willamette Valley soils and root colonization potential by arbuscular mycorrhizal fungi

The effects of Phytophthora ramorum stem inoculation on aspects of tanoak physiology and xylem function in saplings and seedlings

The effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in tanoak sapwood

Soil solarization effects on plant growth variables of field-grown tree saplings

The Role of Mesenchymal Stem Cells in Anti-Tumor Immunity of Canine Osteosarcoma

Particulate Trace Metal Fluxes in the Western Arabian Sea and Their Links to Marine Productivity

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