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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:: Christopher C. Mundt Experiments were performed to determine the nature of maize influence on bean disease

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:: : Christopher C. Mundt This study quantified the frequency of simple versus complex races of Puccinia

Modeling disease gradients and understanding the spread of wheat stripe rust using simulated epidemics

Creator:: Sackett, Kathryn E.
Abstract:: Primary disease gradients of wheat stripe rust, caused by the aerially dispersed fungal pathogen Puccinia striformis, were measured in Madras and Hermiston, OR in the springs of 2002 and 2003. Disease foci were created by inoculating a 1.52m x 1.52m area in each of three replicate field plots (6.1m wide...
Resource Type:: Masters Thesis
Full Text:: approved: Christopher C. Mundt Primary disease gradients of wheat stripe rust, caused by the aerially

Cephalosporium stripe of wheat : seedling-based resistance screening and pathogenic variability

Creator:: Cowger, Christina
Abstract:: Cephalosporium stripe of wheat (Triticum aestivum), caused by the soilborne fungus Cephalosporium gramineum, results in significant yield reductions in dryland winter wheat crops of the U.S. Pacific Northwest. The development of resistant cultivars offers the best hope for disease control. Breeding for resistance is hampered by the long trial times...
Resource Type:: Masters Thesis
Full Text:: : Christopher C. Mundt Cephalosporium stripe of wheat (Triticum aestivum), caused by the soilborne fungus

Interrelationship of wheat cultivar mixtures, stripe rust and yield

Creator:: Akanda, Shamsul I.
Resource Type:: Dissertation
Full Text:: , Stripe Rust and Yield Abstract approved: Christopher C. Mundt Four club wheat (Triticum aestivum

The effect of diversity and spatial arrangement on biomass of agricultural cultivars and native plant species

Creator:: Worster, Catherine Anne
Abstract:: Species and cultivar combinations have been relatively well studied, though little is known about the influence of spatial arrangement on agricultural or native plant mixtures. The effect of spatial pattern on mixtures was explored in three experiments. In the first two, agricultural and native plants were planted in two-way mixtures...
Resource Type:: Masters Thesis
Full Text:: approved: Christopher C. Mundt Species and cultivar combinations have been relatively well studied

Effects of host resistance on Mycosphaerella graminicola populations

Creator:: Cowger, Christina
Abstract:: Mycosphaerella graminicola (anamorph Septoria tritici) causes Septoria tritici blotch, a globally important disease of winter wheat. Resistance and pathogenicity generally vary quantitatively. The pathogen reproduces both sexually and asexually, and the pathogen population is highly genetically variable. Several unresolved questions about the epidemiology of this pathosystem are addressed by this...
Resource Type:: Dissertation
Full Text:: Resistance on Mycosphaerella graminicola Populations. Abstract approved: Christopher C. Mundt

Effects of single and multiple stressors on communities of wheat and wild oats

Creator:: Pfleeger, Thomas G.
Abstract:: Most plant toxicology tests developed in support of environmental laws use a single stress applied to an individual plant. While tests using individual species or stresses require fewer resources and are easier to interpret, they are under increasing criticism for being unrealistic and missing important ecological interactions. The objective of...
Resource Type:: Dissertation
Full Text:: Stressors on Communities of Wheat and Wild Oats. Abstract approved: Christopher C. Mundt Most plant

Interactive effects of stripe rust and plant competition in heterogeneous wheat populations

Creator:: Finckh, Maria Renate
Abstract:: Disease has been implied as an important selective force acting in plant populations. This study was conducted to determine the effects of stripe rust (Puccinia striiformis) on the population dynamics of wheat (Triticum aestivum) cultivar mixtures. Five wheat cultivars were grown in pure stands and all possible mixtures at three...
Resource Type:: Dissertation
Full Text:: from plotting logits of the frequencies (2), (ln[p/(1-p)] versus the number of generations for data

Factors influencing the effects of host diversity on plant disease epidemics for wheat stripe rust and potato late blight

Creator:: Garrett, Karen A.
Abstract:: Most studies of plant disease epidemiology have focused on epidemics in host populations composed of a single genotype. But crop plant diversity can be a useful means of improving the deployment of resistance genes. In a series of experiments with wheat stripe rust and potato late blight, we studied factors...
Resource Type:: Dissertation
Full Text:: Wheat Stripe Rust and Potato Late Blight. Abstract approved: Christopher C. Mundt Most studies of

ScholarsArchive@OSU

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

Effect of wheat cultivar mixtures on populations of Puccinia striiformis races

Modeling disease gradients and understanding the spread of wheat stripe rust using simulated epidemics

Cephalosporium stripe of wheat : seedling-based resistance screening and pathogenic variability

Interrelationship of wheat cultivar mixtures, stripe rust and yield

The effect of diversity and spatial arrangement on biomass of agricultural cultivars and native plant species

Effects of host resistance on Mycosphaerella graminicola populations

Effects of single and multiple stressors on communities of wheat and wild oats

Interactive effects of stripe rust and plant competition in heterogeneous wheat populations

Factors influencing the effects of host diversity on plant disease epidemics for wheat stripe rust and potato late blight

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