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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:: disease epidemics for wheat stripe rust and potato late blight AN ABSTRACT OF THE DISSERTATION OF

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:: professional judgment. Without his consistent, generous support and good management, the research would have

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:: by cultivar x environment interactions in field tests. The principal objective of this research

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:: place for S. tritici in a number of research and crop improvement programs worldwide (Bayles et al

Host and Pathogen Genetics in the Sharp Eyespot Disease of Wheat

Creator:: Liu, Jiang
Abstract:: Wheat sharp eyespot (SES), caused by the soil-borne fungus Rhizoctonia cerealis is a common stem disease of wheat globally. The disease caused a severe and extensive epidemic throughout the Willamette Valley of Oregon in 2014 and has remained one of the most important wheat diseases in this region. However, litte...
Resource Type:: Dissertation
Full Text:: Rhizoctonia cerealis on potato dextrose agar media

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:: source of pathogen inoculum. A number of diseases, such as potato late blight (caused by Phytophthora

Sensitivity of wheat genotypes to a toxic fraction produced by Cephalosporium gramineum and correlation with disease susceptibility

Creator:: Rahman, Mahfuzur
Abstract:: Cephalosporium stripe, caused by the soil-borne ascomycete Cephalosporium gramineum, is becoming an increasingly important disease of winter wheat (Triticum aestivum) in several areas of the world, especially where stubble mulch is practiced to maintain soil moisture and prevent erosion. As cultural control of the disease is infeasible and no fungicides...
Resource Type:: Masters Thesis
Full Text:: research. I am highly indebted to Christopher C. Mundt and Thomas J. Wolpert, my major professors, for

Interrelationship of wheat cultivar mixtures, stripe rust and yield

Creator:: Akanda, Shamsul I.
Resource Type:: Dissertation
Full Text:: financial support through a research assistantship beyond the fellowship period, which contributed

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:: Dr. Warren Kronstad, Dept. of Soils and Crop Science, Oregon State University, and his research

ScholarsArchive@OSU

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

Effects of host resistance on Mycosphaerella graminicola populations

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

Pathogenic variability and adaptation of Septoria tritici to different wheat cultivars

Host and Pathogen Genetics in the Sharp Eyespot Disease of Wheat

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

Sensitivity of wheat genotypes to a toxic fraction produced by Cephalosporium gramineum and correlation with disease susceptibility

Interrelationship of wheat cultivar mixtures, stripe rust and yield

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

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