Index Catalog // ScholarsArchive@OSU

Organic fungicides for control of apple scab and powdery mildew, 1993

Creator:: Wittig, Hans P. P. and Pscheidt, Jay W.
Resource Type:: Conference Proceeding
Full Text:: leucotricha H. P. P. Wittigand J. W. Pscheidt Dept. of Botany and Plant Pathology Oregon State University

Efficacy of fungicides to control brown rot and leaf spot of cherry, 1993

Creator:: Pscheidt, Jay W. and Wittig, Hans P. P.
Resource Type:: Conference Proceeding
Full Text:: leafspot by nearly 50%, compared to the nontreated control. J. W. Pscheidt and H.P.P. Wittig Dept. of

Identification of Genetic Variation between Obligate Plant Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Creator:: Summers, Carly F., Gulliford, Colwyn M., Carlson, Craig H., Lillis, Jacquelyn A., Carlson, Maryn O., Cadle-Davidson, Lance, Gent, David H., and Smart, Christine D.
Abstract:: RNA sequencing (RNA-seq) and genotyping-by-sequencing (GBS) were used for single nucleotide polymorphism (SNP) identification from two economically important obligate plant pathogens, Pseudoperonospora cubensis and P. humuli. Twenty isolates of P. cubensis and 19 isolates of P. humuli were genotyped using RNA-seq and GBS. Principle components analysis (PCA) of each data...
Resource Type:: Article
Full Text:: Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Evaluation of Grape Powdery Mildew Forecasting Programs

Creator:: Pscheidt, Jay W., Wittig, H. P. P., and Candolfi-Vasconcelos, M. Carmo
Abstract:: Three forecasting programs for scheduling fungicide applications were selected for comparison with the standard Oregon phenology based program. The UCDavis (California) program used leaf wetness and temperature early in the year and only temperature during the summer. The New York program was based on rainfall and temperature. The German Oi...
Resource Type:: Technical Report
Full Text:: Forecasting Programs J. W. Pscheidt, H. P. P. Wittig and M. C. Candolfi-Vasconcelos Department of Botany

Irrigated crop research in Oregon's Columbia Basin : 1981 research report

Creator:: Oregon State University. Agricultural Experiment Station and Columbia Basin Agricultural Research Center
Abstract:: Published July 1981. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: . P. Davidson, Assistant Professor Emeritus of Horticulture, Columbia Basin Agriculture Research and

Vegetation, Bryophytes, Lichens, Environment, and Stand Dynamics in Forests of the Swan Valley, Montana

Creator:: McCune, Bruce and Antos, Joseph A.
Abstract:: We sampled vegetation, bryophytes, lichens, environment, and stand dynamics in 56 plots in the Swan Valley, Montana in 1975-1978. The data include complete inventory of trees in 375 m2 plots, with whole-plot ocular estimates of plant cover by species, transect sampling of the ground layer bryophytes and lichens with microplots,...
Resource Type:: Dataset
Full Text:: Parmelia sulcata percent cover Parmelia sulcata Includes P. hygrophila Epiphytes 23 Parmambi Parmeliopsis

Phylogenetic placement of the ectomycorrhizal genus Cenococcum in Gloniaceae (Dothideomycetes)

Creator:: Spatafora, Joseph W., Owensby, C. Alisha, Douhan, Greg W., Boehm, Eric W. A., and Schoch, Conrad L.
Abstract:: Cenococcum is a genus of ectomycorrhizal Ascomycota that has a broad host range and geographic distribution. It is not known to produce either meiotic or mitotic spores and is known to exist only in the form of hyphae, sclerotia and host-colonized ectomycorrhizal root tips. Due to its lack of sexual...
Resource Type:: Article
Full Text:: B 1 R P B 2 1- 1- 5 B ro w n s V al le y, C al if o rn ia , U SA ; Q u er cu s d ou

Effects of the Mycoparasite Sphaerellopsis filum on Overwintering Survival of Stem Rust in Perennial Ryegrass

Creator:: Gordon, T. C. and Pfender, W. F.
Abstract:: Sphaerellopsis filum is a mycoparasite of Puccinia graminis subsp. graminicola, a rust fungus that causes widespread crop damage on perennial ryegrass grown for seed. In observations taken over the winter months, S. filum was found naturally colonizing 2% of P. graminis subsp. graminicola uredinia on first-year plantings and 25% of...
Resource Type:: Article
Full Text:: ′ N, 123°20′ W). In experiment 1 (“con- trolled inoculation experiment”) plants were inoculated with P

Comments Regarding the Binary Power Law for Heterogeneity of Disease Incidence

Creator:: Turechek, W. W., Madden, L. V., and Gent, D. H.
Abstract:: The binary power law (BPL) has been successfully used to characterize heterogeneity (overdispersion or small-scale aggregation) of disease incidence for many plant pathosystems. With the BPL, the log of the observed variance is a linear function of the log of the theoretical variance for a binomial distribution over the range...
Resource Type:: Article
Full Text:: data collected by W. W. Turechek, S. Adkins, and P. D. Roberts from a 1-ha watermelon field located at

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:: and Out-of-Canopy Sensor Placement W. F. Pfender and D. H. Gent, United States Department of

ScholarsArchive@OSU

Organic fungicides for control of apple scab and powdery mildew, 1993

Efficacy of fungicides to control brown rot and leaf spot of cherry, 1993

Identification of Genetic Variation between Obligate Plant Pathogens Pseudoperonospora cubensis and P-humuli Using RNA Sequencing and Genotyping-By-Sequencing

Evaluation of Grape Powdery Mildew Forecasting Programs

Irrigated crop research in Oregon's Columbia Basin : 1981 research report

Vegetation, Bryophytes, Lichens, Environment, and Stand Dynamics in Forests of the Swan Valley, Montana

Phylogenetic placement of the ectomycorrhizal genus Cenococcum in Gloniaceae (Dothideomycetes)

Effects of the Mycoparasite Sphaerellopsis filum on Overwintering Survival of Stem Rust in Perennial Ryegrass

Comments Regarding the Binary Power Law for Heterogeneity of Disease Incidence

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

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