Index Catalog // ScholarsArchive@OSU

Assessment of Grapevine Red Blotch Virus Impacts on Physiology, Productivity, and Fruit Composition of ‘Pinot noir’ Grown in Oregon’s Willamette Valley

Creator:: Litwin, Justin A.
Abstract:: Grapevine red blotch disease (GRBD) is caused by Grapevine Red Blotch Virus, a virus in the Geminiviridae family. Observable symptoms can manifest in red cultivars, such as leaf blades that are partially to fully red, red veins, and different combinations of the two. Previous research has shown evidence of reduced...
Resource Type:: Masters Thesis
Full Text:: of my committee, including Dr. Jay Pscheidt and Dr. Alec Levin for their involvement in my

Environmental Factors Affecting Phytophthora Root Rot of Rhododendron

Creator:: Mestas, Angie
Abstract:: Phytophthora root rot decreases availability and quality of rhododendrons produced in the USA. Symptoms of Phytophthora root rot include root necrosis, leaf chlorosis, stunting, and permanent wilt. The purpose of this thesis was to better understand the impact of root damage, soil moisture, nitrogen fertilizer application, and pathogen species on...
Resource Type:: Masters Thesis
Full Text:: , Jay Pscheidt, Shawn Mehlenbacher, and also to Annie Davis, Bryan Beck, Jesse Mitchell, Marj Storm

Identification of Viruses Associated with Raspberry Leaf Curl Disease

Creator:: Guzman Martinez, Melinda
Abstract:: Raspberries are an important commodity worldwide, with the United States (U.S.) leading fourth in global production in 2017. An important factor when shipping propagated Rubus across the globe is the security of clean plant material verified through pathogen detection methods which is vital in preventing disease spread. A raspberry virus...
Resource Type:: Masters Thesis
Full Text:: would like to thank my committee members Drs. Malcolm Lowry, Chris Mundt, and Jay Pscheidt, who

Grape Powdery Mildew Management: The Interaction Between Inflorescence Stage and Fungicide Chemistry

Creator:: Warneke, Brent W.
Abstract:: Grape powdery mildew (GPM, causal agent Erysiphe necator) is the most economically important disease of grapevine in the Western U.S. Low levels of GPM infection on clusters (1-5%) can negatively affect wine sensory quality, so intensive fungicide programs are common. This may lead to problems like excessive fungicide use and...
Resource Type:: Masters Thesis
Full Text:: and agriculture; Jay Pscheidt for his teaching and sharing knowledge of the grape industry; Shawn

Phylogenetic Identification of Pathogenic and Endophytic Fungal Populations in West Coast Douglas-fir (Pseudotsuga menziesii) Foliage

Creator:: Daniels, Hazel A.
Abstract:: Douglas-fir provides social, economic, and ecological benefits in the Pacific Northwest (PNW). In addition to timber, forests support abundant plant and animal biodiversity and provide socioeconomic viability for many rural communities. Products derived from Douglas-fir account for approximately 17% of the U.S. lumber output with an estimated value of $1.9...
Resource Type:: Masters Thesis
Full Text:: side. I am also fortunate to have Jeff Morrell, Dave Shaw, and Jay Pscheidt as committee members

Response to fenamiphos, extraction techniques and population dynamics of Pratylenchus penetrans on western Oregon red raspberry

Creator:: Lolas, Mauricio
Abstract:: The effects of fenamiphos on soil and root populations of Pratylenchus penetrans were evaluated in four red raspberry cv. Willamette fields in Northwestern Oregon. Field 1 was a silty clay loam with 53% organic matter (OM). Field 2 and 3 were silty loam soils with 3.25 and 2.55% OM, respectively...
Resource Type:: Masters Thesis
Full Text:: Strik, Dr. Jay Pscheidt, and Dr. Ralph Berry, for their contributions to this thesis, their advices

New sources and linked AFLP markers for Eastern filbert blight resistance in hazelnut

Creator:: Chen, Honglin
Abstract:: Eastern filbert blight (EFB), caused by Anisogramma anomala (Peck) E. Miiller, is a devastating disease to orchards of the European hazelnut (Corylus avellana L.) in the Willamette Valley, Oregon. Host resistance is the most desirable means of disease control. Fifty-eight hazelnut accessions, including European cultivars and interspecific hybrids were evaluated...
Resource Type:: Masters Thesis
Full Text:: my graduate committee: Dr. Dan Schafer, Dr. Jay W. Pscheidt and Dr. Pat Breen, for their precious

Native bee diversity and floral resource availability in two Willamette Valley Oregon ecosystems

Creator:: Bergh, Jennifer E.
Abstract:: The importance of pollinators in native and managed landscapes is well known, and recent interest is directed towards investigating the role of native bees as providers of pollination ecosystem services. Uncertainty about bee populations at global and local scales has prompted research and general interest in conservation of bee diversity....
Resource Type:: Masters Thesis
Full Text:: and Dr. Jay Pscheidt, for your time and involvement with my research and thesis. I would also

Citizen perspectives on hazardous fuel reduction in the Blue Mountains : findings and implications from panel research

Creator:: Toman, Eric Lee
Abstract:: Forests in the Blue Mountains region of eastern Oregon and Washington are facing a large-scale forest health crisis. Poor forest conditions have greatly increased the risk of catastrophic wildfire. Resource managers in the Wallowa-Whitman, Umatilla, and Malheur National Forests are utilizing prescribed fire and mechanized thinning treatments to reduce hazardous...
Resource Type:: Masters Thesis
Full Text:: other committee members-Denise Lach, John Tappeiner, and Jay Pscheidt-offered invaluable advice and

Evaluating the Potential of Protein Supplements and Probiotics for Improving Honey Bee Health and Understanding Honey Bee Behaviors Related to Social Immunity

Creator:: Chapkin, Elissa R.
Abstract:: Managed honey bees (Apis mellifera) play a vital role in pollinating cultivated crops worldwide. Honey bee colony declines reported in the past two decades have been associated with stressors such as pests and diseases, pesticide exposure, and poor nutrition. In the wake of these colony declines, beekeepers have strived to...
Resource Type:: Masters Thesis
Full Text:: process of analyzing bee guts. I would also like to acknowledge Andony Melathopoulos, Jana Lee, and Jay

ScholarsArchive@OSU

Assessment of Grapevine Red Blotch Virus Impacts on Physiology, Productivity, and Fruit Composition of ‘Pinot noir’ Grown in Oregon’s Willamette Valley

Environmental Factors Affecting Phytophthora Root Rot of Rhododendron

Identification of Viruses Associated with Raspberry Leaf Curl Disease

Grape Powdery Mildew Management: The Interaction Between Inflorescence Stage and Fungicide Chemistry

Phylogenetic Identification of Pathogenic and Endophytic Fungal Populations in West Coast Douglas-fir (Pseudotsuga menziesii) Foliage

Response to fenamiphos, extraction techniques and population dynamics of Pratylenchus penetrans on western Oregon red raspberry

New sources and linked AFLP markers for Eastern filbert blight resistance in hazelnut

Native bee diversity and floral resource availability in two Willamette Valley Oregon ecosystems

Citizen perspectives on hazardous fuel reduction in the Blue Mountains : findings and implications from panel research

Evaluating the Potential of Protein Supplements and Probiotics for Improving Honey Bee Health and Understanding Honey Bee Behaviors Related to Social Immunity

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