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Molecular characterization of a protein toxin involved in the Pyrenophora tritici-repentis/wheat interaction

Creator:: Tuori, Robert P.
Resource Type:: Dissertation
Full Text:: Pyrenophora tritici-repentis/wheat interaction AN ABSTRACT OF THE THESIS OF Robert P. Tuori for the

Effects of intercropping beans with maize on angular leaf spot and rust of beans

Creator:: Boudreau, Mark Alan, 1958-
Abstract:: Experiments were performed to determine the nature of maize influence on bean disease in additive-type intercrops. Overall effects of intercrops on angular leaf spot (caused by Phaeoisariopsis griseola) in Kenya indicated >23% reductions (P<0.05) in area under the disease progress curve (AUDPC) in two of three season-site combinations. Fertilization tended...
Resource Type:: Dissertation
Full Text:: : Plant Disease Epidemiology. P. R. Scott and A. W. Bainbridge, eds. Blackwell Scientific Pub., Oxford. 4

Population dynamics, extraction, and response to nematicide of three plant parasitic nematodes on peppermint (mentha piperita L.)

Creator:: Merrifield, Kathryn J.
Abstract:: The efficiencies of wet sieving/sucrose centrifugation (WS/SC) recovery of Pratylenchus penetrans (59 %), Paratylenchus sp., (80 %), and Criconemella xenoplax (66 %) were established. Baermann funnels (BF) recovered significantly more P. penetrans (p = 0.01) and significantly less (p = 0.01) C. xenoplax than did WS/SC. While densities of P....
Resource Type:: Masters Thesis
Full Text:: . Baermann funnels (BF) recovered significantly more P. penetrans (p = 0.01) and significantly less (p

Biology, epidemiology, and biological and chemical control of Phytophthora vignae

Creator:: Fernando, W. Gerard Dilantha
Abstract:: Phytophthora vignae, causal agent of stem and root rot of cowpea (Vigna unguiculata), was reported for the first time in Sri Lanka. The pathogen was found in cowpea field soils from 3 of 5 geographic regions sampled. Only one site however, had plants exhibiting disease symptoms. Of the eight cowpea...
Resource Type:: Dissertation
Full Text:: other legumes inoculated were completely resistant. Two morphologic and physiologic races of P. vignae

Susceptibility of Pacific yew (Taxus brevifolia Nutt.) to Phytophthora lateralis

Creator:: Murray, Marion S.
Abstract:: In 1991 Pacific yew (Taxus brevifolia Nutt.) was reported as a new host for Phytophthora lateralis Tucker and Milbrath which is an aggressive root rot pathogen thought previously to be specific to Port-Orford-cedar. This study was designed to compare the pathogenicity of P. lateralis on the two hosts, and to...
Resource Type:: Masters Thesis
Full Text:: study was designed to compare the pathogenicity of P. lateralis on the two hosts, and to characterize

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:: stand of winter wheat were inoculated with three races of P. striiformis (CDL 27, CDL 29, and CDL 41

Canopy epiphyte studies in the central Oregon Cascades : implications for the management of Douglas-fir forests

Creator:: Sillett, Stephen Charles
Abstract:: This thesis includes four separate studies. The first two studies assessed edge effects in a 700-year-old forest. After 20 years of exposure, epiphyte assemblages on the clearcut edge were similar to those of the forest interior, but there were some differences in vertical distribution patterns. Several species restricted to the...
Resource Type:: Dissertation
Full Text:: old-growth forests but high in clearcuts. P. rainierensis grew Redacted for Privacy significantly

Genetic variability in the eastern filbert blight pathosystem

Creator:: Osterbauer, Nancy K.
Abstract:: The heritability of resistance to eastern filbert blight, caused by Anisogramma anomala, in European hazelnut (Corylus avellana) was evaluated in the progeny of seven cultivars crossed in 12 combinations. Progeny produced by crossing 'VR6-28' with three susceptible cultivars segregated 1:1 for complete resistance to eastern filbert blight. Histograms of disease...
Resource Type:: Dissertation
Full Text:: seven regions infected `Barcelona'; there were no significant differences (P > 0.05) in isolate

Pathogenic variability and adaptation of Septoria tritici to different wheat cultivars

Creator:: Ahmed, Hafiz Uddin
Abstract:: Experiments were done to determine pathogenic variability and pathogenic adaptation of Septoria tritici to different wheat cultivars. Fifteen S. tritici isolates from California, Oregon, and Texas were evaluated on seedlings of two sets of geographically diverse wheat cultivars under greenhouse conditions. Significant isolate effects, cultivar effects, and isolate X cultivar...
Resource Type:: Dissertation
Full Text:: any and Plant P logy Dean of Gradualte Scho Date thesis is presented November 1, 1993 Thesis

Interrelationship of wheat cultivar mixtures, stripe rust and yield

Creator:: Akanda, Shamsul I.
Resource Type:: Dissertation
Full Text:: variety mixtures. In Plant Disease Epidemiology, eds P. R. Scott and A. Bainbridge, pages 129-137

ScholarsArchive@OSU

Molecular characterization of a protein toxin involved in the Pyrenophora tritici-repentis/wheat interaction

Effects of intercropping beans with maize on angular leaf spot and rust of beans

Population dynamics, extraction, and response to nematicide of three plant parasitic nematodes on peppermint (mentha piperita L.)

Biology, epidemiology, and biological and chemical control of Phytophthora vignae

Susceptibility of Pacific yew (Taxus brevifolia Nutt.) to Phytophthora lateralis

Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

Canopy epiphyte studies in the central Oregon Cascades : implications for the management of Douglas-fir forests

Genetic variability in the eastern filbert blight pathosystem

Pathogenic variability and adaptation of Septoria tritici to different wheat cultivars

Interrelationship of wheat cultivar mixtures, stripe rust and yield

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