Index Catalog // ScholarsArchive@OSU

Hybridization between Castilleja levisecta and C. hispida : Implications for Pacific Northwest Prairie Management

Creator:: Sandlin, Isaac J., III
Abstract:: Conservation conflicts may develop on restoration sites with multiple species recovery objectives. For example, on Pacific Northwest prairies, the co-planting of the diploid cytotype of the common native wildflower Castilleja hispida with the endangered wildflower C. levisecta has resulted in putative Castilleja hybrids on restoration sites, prompting fears that genetic...
Resource Type:: Masters Thesis
Full Text:: swamping could threaten C. levisecta. Because C. hispida is a larval host for the endangered Taylor’s

Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

Creator:: DiLeone, Julie A.
Abstract:: This study quantified the frequency of simple versus complex races of Puccinia striiformis Westend. in mixtures of wheat cultivars possessing different race-specific resistance genes. A simple race of a pathogen can infect only one component, and a complex race of the pathogen can infect two or more components of an...
Resource Type:: Masters Thesis
Full Text:: Puccinia striiformis races AN ABSTRACT OF THE THESIS OF Julie A. DiLeone for the degree of Master of

Genetic diversity and interactions in populations of plants and pathogens

Creator:: Knott, Elizabeth A.
Abstract:: Two experiments involving interactions between wheat (Triticum aesitivium L.) cultivars and rust pathogens were investigated. One experiment evaluated the aggressiveness (measured by infection efficiency and latent period) of populations of Puccinia recondita Rob. when inoculated on the cultivar they were isolated from, their "own" cultivar, and when inoculated onto other...
Resource Type:: Masters Thesis
Full Text:: . Accepted for publication 00 00000 0000. 5 Abstract Knott, E. A., and Mundt, C. C. 1990. Differences

Effects of grazing and nitrogen enrichment on the taxonomic structure of periphyton assemblages in lotic ecosystems

Creator:: Lundberg, Chris H.
Resource Type:: Masters Thesis
Full Text:: limnephilid caddisfly Dicosmoecus gilvipes (Hagen) were investigated in a 50-day laboratory experiment

Calochortus howellii : ecology of a rare serpentine endemic, and comparison with the new species, C. umpquaensis (Liliaceae)

Creator:: Fredricks, Nancy Ann
Resource Type:: Masters Thesis
Full Text:: bowellii Watson (Liliaceae) are characterized and a related new species, C. umpquaensis Fredricks, is

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

Creator:: Brazil, Jessie A.
Abstract:: Bacterial soft rot of potato (Solanum tuberosum), caused by Pectobacterium and Dickeya species, is among the most common and destructive potato diseases in the United States. These pathogens cause a variety of vascular wilts, and in potato cause a disease complex that includes tuber soft rot, blackleg, aerial stem rot,...
Resource Type:: Masters Thesis
Full Text:: . C. M., van Veen, J. A., and van der Wolf, J. M. 2011. Control of blackleg and tuber soft rot of

Presence and pathogenicity of Fusarium and Verticillium species in commercial red radish (Raphanus sativus) seed production in the Willamette Valley of Oregon

Creator:: Bomberger, Rachel A.
Abstract:: Commercial radish seed producers in the Willamette Valley of Oregon have observed a late season wilt in their seed fields. Twenty-two fields were surveyed for wilt in the Willamette Valley during June through August 2012 and 2013. Plants exhibiting wilt symptoms were collected from the fields and examined for vascular...
Resource Type:: Masters Thesis
Full Text:: in the cabbage tribe of the Brassicaceae at 24˚C, but when the temperature was increased to 28˚C, a

Purification and partial characterization of a virus associated with korogwe leaf spot disease of sisal

Creator:: Mpunami, Anatolia
Abstract:: Sisal Wave sisalana Perrine), one of Tanzania's main cashcrops, is severely affected by korogwe leaf spot disease (KLS).Infected plants show chocolate brown, concentric, scablike eruptions on both surfaces of mature leaves, and produce stained, low-quality fiber. A flexuous, rod-shaped virus was isolated from KLS-infected sisal leaves and studied at Oregon...
Resource Type:: Masters Thesis
Full Text:: was moved to subgroup I. A new addition (1981) to the list is prefixed c. * - The vector is not known

Pseudaleuria quinaultiana, a new genus and species of operculate ascomycete from the Olympic Peninsula

Creator:: Lusk-Newman, Demaris E.
Abstract:: Pseudaleuria quinaultiana gen. et sp. nova is described in English and Latin. P. quinaultiana is compared with Aleuria, Anthracobia Cheilymenia, Geopyxis, Humaria, lodophanus, Jafnea, Leucoscypha, Melastiza, Octospora, Pyronema, Scutellinia, Sphaerosporella, Tricharina, Morchella, Cookeina, Phillipsia, Pseudoplectania, Sarcoscypha, and Sarcosoma. Of these genera P. quinaultiana has hairs most similar to those found...
Resource Type:: Masters Thesis
Full Text:: collected by C. H. Kauffman in 1915 and 1925, and A. H. Smith in 1935, 1939, and 1941. From these

Hop cone tip blight : a new disease in the Pacific Northwest

Creator:: Bienapfl, John C.
Abstract:: A necrosis at the tip of cones was observed on hop (Humulus lupulus), cultivar "Nugget", grown in Oregon in the early 1990's. Fusarium sambucinum and F. avenaceum were recovered from symptomatic cones in 1998 and preliminary inoculation experiments suggested both Fusarium species could cause hop cone necrosis. Studies were carried...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Hybridization between Castilleja levisecta and C. hispida : Implications for Pacific Northwest Prairie Management

Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

Genetic diversity and interactions in populations of plants and pathogens

Effects of grazing and nitrogen enrichment on the taxonomic structure of periphyton assemblages in lotic ecosystems

Calochortus howellii : ecology of a rare serpentine endemic, and comparison with the new species, C. umpquaensis (Liliaceae)

Diversity and Impact of Soft Rot Pathogens of Potato in the Columbia Basin

Presence and pathogenicity of Fusarium and Verticillium species in commercial red radish (Raphanus sativus) seed production in the Willamette Valley of Oregon

Purification and partial characterization of a virus associated with korogwe leaf spot disease of sisal

Pseudaleuria quinaultiana, a new genus and species of operculate ascomycete from the Olympic Peninsula

Hop cone tip blight : a new disease in the Pacific Northwest

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