Index Catalog // ScholarsArchive@OSU

Creator:: Sherman, Jennifer and Gent, David H.
Abstract:: Impact and relevance are valued by both plant pathologists and the supporters of research and extension. Impact has been characterized as the “So what?” of research results, and in applied research in agriculture typically involves some change in human behavior. This might involve, for instance, avoidance of broad spectrum pesticides,...
Resource Type:: Article
Full Text:: - Corresponding author: David H. Gent, U.S. Department of Agriculture- Agricultural Research Service, Forage Seed

Creator:: Arp, Daniel J. and Burris, Robert H.
Abstract:: The kinetic mechanism of the unidirectional H2-oxidizing hydrogenase from soybean nodule bacteroids has been investigated with highly purified enzyme. Measurements of the K, for H2 vary from 0.97 to 2.6 pM, and the K,,, for methylene blue varies from 6 to 17 pM. With H2 and methylene blue as substrates,...
Resource Type:: Article
Full Text:: Hydrogen-Oxidizing Hydrogenase from Soybean Nodule Bacteroids? Daniel J. Arp and Robert H. Burris

Creator:: McCune, B., Divakar, P. K., and Upreti, D. K.
Abstract:: Morphological and chemical studies of Hypogymnia from the Himalayas revealed one new species, three species new to the region, and a previously unrecognized synonym. Hypogymnia crystallina, distinguished by its rimmed holes in the lobe axils, a pruinose disc, POL+ epihymenium, and distinctive chemistry (zeorin, hypoprotocetraric acid, usnic acid and atranorin)...
Resource Type:: Article
Full Text:: synonymized with H. thomsoniana and a second location is reported for the recently described H. sikkimensis

Creator:: Gent, David H., Twomey, Megan C., Wolfenbarger, Sierra N., and Woods, Joanna L.
Abstract:: Optimum timing and use of fungicides for disease control are improved by an understanding of the characteristics of fungicide physical mode of action. Greenhouse and field experiments were conducted to quantify and model the duration of pre- and postinfection activity of fungicides most commonly used for control of hop downy...
Resource Type:: Article

Creator:: Liston, Aaron, Rieseberg, Loren H., and Elias, Thomas S.
Abstract:: This scanned article is provided to correct an error on the publisher’s website. The online version has incorrectly given the first author name as “Listen, Aaron” rather than the correct, “Liston, Aaron.” If using this article, please cite the first author correctly.
Resource Type:: Article
Full Text:: the flowering plant Datisca glomerata Aaron Liston*, Loren H. Rieseberg & Thomas S. Elias Rancho

Creator:: Nelson, Mark E., Gent, David H., and Grove, Gary G.
Abstract:: Results of 28 field trials conducted over a 12-year period investigating management of hop powdery mildew caused by Podosphaera macularis were quantitatively summarized by meta-analysis to compare product efficacy and use patterns by mode of action as defined by Fungicide Resistance Action Committee (FRAC) groups. Availability of original observations enabled...
Resource Type:: Article
Full Text:: Hop Cones Nelson, M. E., Gent, D. H., & Grove, G. G. (2015). Meta-analysis reveals a critical

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

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:: for Heterogeneity of Disease Incidence W. W. Turechek, L. V. Madden, D. H. Gent, and X.-M. Xu

Creator:: Gent, David H., Mahaffee, Walter F., McRoberts, Neil, and Pfender, William F.
Abstract:: Disease predictive systems are intended to be management aids. With a few exceptions, these systems typically do not have direct sustained use by growers. Rather, their impact is mostly pedagogic and indirect, improving recommendations from farm advisers and shaping management concepts. The degree to which a system is consulted depends...
Resource Type:: Article
Full Text:: PY51CH13-Gent ARI 2 July 2013 11:59 The Use and Role of Predictive Systems in Disease Management David H

Creator:: McCune, Bruce, Schoch, Conrad, Root, Heather T., Kageyama, Stacie A., and Miadlikowska, Jolanta
Abstract:: Hypogymnia imshaugii is one of the most common, conspicuous and morphologically variable epiphytic lichens of the Pacific coastal states and provinces. The species varies greatly in morphology and chemistry, suggesting multiple closely related species or one or more phenotypically plastic species. We sought to determine whether additional ecologically meaningful species...
Resource Type:: Article
Full Text:: whether additional ecologically meaningful species might be present within the H. imshaugii complex

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