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Pathogenicity of Phytophthora species from Oregon waterways

Creator:: Navarro, Sarah M.
Abstract:: Described as one of the most destructive pathogens of agricultural crops and forest trees, Phytophthora is a genus of microorganisms containing over 100 known species. Phytophthora alni has caused collar and root disease in alders throughout Europe and a form of the species has recently been isolated in North America....
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Sarah M. Navarro

Phytophthora species and riparian alder tree damage in western Oregon

Creator:: Sims, Laura L.
Abstract:: The genus Phytophthora contains some of the most destructive pathogens of forest trees, including the most destructive pathogen of alder in recent times, Phytophthora alni. Alder trees were reported to be suffering from canopy dieback in riparian ecosystems in western Oregon, which prompted a survey of alder health and monitoring...
Resource Type:: Dissertation
Full Text:: Tree Damage in Western Oregon Abstract approved: Everett M. Hansen The genus Phytophthora

Evolving while invading: rapid adaptive evolution in juvenile development time for a biological control organism colonizing a high-elevation environment

Creator:: McEvoy, Peter B., Higgs, Kimberley M., Coombs, Eric M., Karacetin, Evrim, and Starcevich, Leigh Ann
Abstract:: We report evidence of adaptive evolution in juvenile development time on a decadal timescale for the cinnabar moth Tyria jacobaeae (Lepidoptera: Arctiidae) colonizing new habitats and hosts from the Willamette Valley to the Coast Range and Cascades Mountains in Oregon. Four lines of evidence reveal shorter egg to pupa juvenile...
Resource Type:: Article
Full Text:: organism colonizing a high-elevation environment Peter B. McEvoy,1 Kimberley M. Higgs,1 Eric M. Coombs,2

Development of Computational, Visualization, and Molecular Tools for Fungal and Oomycete Community Ecology

Creator:: Foster, Zachary Stephen Longiaru
Abstract:: Oomycetes are an important group of organisms with a variety of ecological roles similar to fungi. Although many are well-studied plant pathogens known for their devastating effects on agricultural systems, most are little-studied saprobes and parasites of plants and animals in nearly every ecosystem on earth. The advent of affordable...
Resource Type:: Dissertation
Full Text:: . Valerie J. Fieland assited with methodology, lab work, data analysis, and writing. Meredith M. Larsen

Sensitivity of Disease Management Decision Aids to Temperature Input Errors Associated with Sampling Interval and Out-of-Canopy Sensor Placement

Creator:: Pfender, W. F., Gent, D. H., and Mahaffee, W. F.
Abstract:: Many plant disease epidemic models, and the disease management decision aids developed from them, are created based on temperature or other weather conditions measured in or above the crop canopy at intervals of 15 or 30 min. Disease management decision aids, however, commonly are implemented based on hourly weather measurements...
Resource Type:: Article
Full Text:: implemented based on hourly weather measurements made from sensors sited at a standard placement of 1.5 m

Autecology, reproductive ecology, and demography of Astragalus australis var. olympicus (Fabaceae)

Creator:: Kaye, Thomas N.
Abstract:: The goal of this study was to gather information on the autecology, reproductive ecology, and population dynamics of Astragalus australis var. olympicus as a baseline for conservation strategies and to help explain its restricted range. Approximately four thousand individuals occurred in four known population centers in the Olympic Mountains, Olympic...
Resource Type:: Masters Thesis
Full Text:: southeast to southwest slopes above 1450 m. A. australis var. olympicus was absent from surrounding non

Genetic diversity of the narrow endemic Astragalus oniciformis (Fabaceae)

Creator:: Alexander, J. Andrew, Liston, Aaron, and Popovich, Steve J.
Abstract:: Astragalus oniciformis Barneby is a narrow endemic xerophyte of the upper Snake River Plain of central Idaho, USA, where it inhabits stabilized, aeolian sand deposits and previously burned, sandy sites over Quaternary basalt flows. The objective of this study was to determine the levels and distribution of genetic differentiation within...
Resource Type:: Article
Full Text:: were sampled at least 10 m apart to minimize sampling of progeny. Between 20 and 80 mg of leaf material

Lichen Biomonitoring from Valley to Alpine in Central and Southern California

Creator:: Kovasi, Adrienne I.
Abstract:: In the mountains of central and southern California, high elevation wilderness areas lack epiphytic lichens that can be used to inform us about atmospheric deposition in multiple ways. Epiphytic lichens are capable of accumulating elements proportionally to the local atmospheric concentration, establishing them as commonly used biomonitor of key elements....
Resource Type:: Masters Thesis
Full Text:: . Lichen samples were collected between 2013 and 2019 at 31 plots between 180 and 3330 m of elevation

Genetic diversity of populations of Astragalus oniciformis using inter-simple sequence repeat (ISSR) markers

Creator:: Alexander, J. Andrew
Abstract:: Astragalus oniciformis Barneby is a xerophyte of the sagebrush deserts of central Idaho. It is a narrow endemic of the upper Snake River Plains where it inhabits stabilized, aeolian sand deposits over Quaternary basalt flows. The objective of this study was to determine the levels and distribution of genetic differentiation...
Resource Type:: Masters Thesis
Full Text:: DS. .1 LINCOLN 4r zr SD CBS m Dietrich N I 16 0 'SC BLAINE Ii S .SP? jT1!f MINIDOKA -113.6

A fistful of Astragalus : phenotypic and genotypic basis of the most taxon rich species in the North American flora

Creator:: Knaus, Brian J.
Abstract:: The study of the infra-specific ranks (i.e., subspecies and variety) can be considered the study of the process of speciation. Astragalus lentiginosus Douglas ex Hooker (Fabaceae) is the most taxon rich species in the U.S. flora currently including 40 taxonomic varieties. These varieties were described using traditional taxonomic methods primarily...
Resource Type:: Dissertation
Full Text:: thank: My family: John H. Hoffman�, Pat Hoffman Friedman�, M. Jane Knaus, Alan L. Knaus, Darin A

ScholarsArchive@OSU

Pathogenicity of Phytophthora species from Oregon waterways

Phytophthora species and riparian alder tree damage in western Oregon

Evolving while invading: rapid adaptive evolution in juvenile development time for a biological control organism colonizing a high-elevation environment

Development of Computational, Visualization, and Molecular Tools for Fungal and Oomycete Community Ecology

Sensitivity of Disease Management Decision Aids to Temperature Input Errors Associated with Sampling Interval and Out-of-Canopy Sensor Placement

Autecology, reproductive ecology, and demography of Astragalus australis var. olympicus (Fabaceae)

Genetic diversity of the narrow endemic Astragalus oniciformis (Fabaceae)

Lichen Biomonitoring from Valley to Alpine in Central and Southern California

Genetic diversity of populations of Astragalus oniciformis using inter-simple sequence repeat (ISSR) markers

A fistful of Astragalus : phenotypic and genotypic basis of the most taxon rich species in the North American flora

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