Index Catalog // ScholarsArchive@OSU

A G-type Lectin Receptor-like Kinase Associated with Septoria Canker Resistance and Susceptibility Described using Multi-omics and Biotechnology

Creator:: Lenz, Ryan R.
Abstract:: Managers of forest and plantation ecosystems are encountering growing problems involving plant pathogens and the expanding geographic ranges of these pathogens. Historically unexposed stands are exceptionally vulnerable when a non-native pathogen is introduced because these pathogens can cause devastating disease in a host population that lacks co-evolved resistance mechanisms. One...
Resource Type:: Dissertation
Full Text:: DISSERTATION OF Ryan R. Lenz for the degree of Doctor of Philosophy in Botany and Plant Pathology

Advances in molecular systematics of clavicipitaceous fungi (Sordariomycetes: Hypocreales)

Creator:: Kepler, Ryan M.
Abstract:: Historical concepts of Clavicipitaceae have included a broad range of species that display diverse morphologies, ecological modes and host associations. When subjected to multigene phylogenetic investigation of evolutionary history, the family was found to be polyphyletic, largely driven by diversity in the genus Cordyceps, previously containing over 400 taxa. The...
Resource Type:: Dissertation
Full Text:: OF Ryan M. Kepler for the degree of Doctor of Philosophy in Botany and Plant Pathology

Addressing the relationship between Pseudoperonospora cubensis and P. humuli using phylogenetic analyses and host specificity assays

Creator:: Mitchell, Melanie N.
Abstract:: The two most economically important plant pathogens in the Pseudoperonospora (Peronosporaceae) genus are P. cubensis, causal agent of cucurbit downy mildew, and P. humuli, causal agent of hop downy mildew. These organisms have been shown to be very closely related phylogenetically and morphologically. In 2005, researchers in Korea proposed that...
Resource Type:: Masters Thesis
Full Text:: . Title: Addressing the Relationship Between Pseudoperonospora cubensis and P. humuli using Phylogenetic

Hybridization between Castilleja levisecta and C. hispida : Implications for Pacific Northwest Prairie Management

Creator:: Sandlin, Isaac J., III
Abstract:: Conservation conflicts may develop on restoration sites with multiple species recovery objectives. For example, on Pacific Northwest prairies, the co-planting of the diploid cytotype of the common native wildflower Castilleja hispida with the endangered wildflower C. levisecta has resulted in putative Castilleja hybrids on restoration sites, prompting fears that genetic...
Resource Type:: Masters Thesis
Full Text:: Journal 36: 207–215. 7 FLOBERG, J., T. HORSMAN, D. ROLPH, P. SKIDMORE, G. WILHERE, C. CHAPPELL, P

Lichen response to the environment and forest structure in the western Cascades of Oregon

Creator:: Martin, Erin P.
Abstract:: Lichens are an important part of the biota in western Oregon forests, where they perform valuable ecological roles and contribute significantly to biodiversity. Lichens in western Oregon are threatened by a number of factors including air pollution and land use practices. If we wish to maintain the persistence of lichens...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Erin P. Martin for the

Parmelina yalungana resurrected and reported from Alaska, China and Russia

Creator:: Nelson, Peter R., Kepler, Ryan, Walton, James, Fankhauser, John, Nelson, Laura, and Song, Wang Li
Abstract:: Parmelina quercina is a well-studied foliose macro-lichen found on rocks and trees in the Northern Hemisphere. Recent studies support multiple species within P. quercina based on material from Europe, North America and western Asia. The identities of Parmelina quercina s.lat. reported from eastern Asia and Alaska remain unknown. We compared...
Resource Type:: Article
Full Text:: –81. ———, Z. Ferencova, S. Pérez-Ortega, J. A. Elix & P. K. Divakar. 2010. Austroparmelina, a new

Effect of resident epiphytic fungi development of brown rot blossom blight of stone fruits

Creator:: Wittig, Hans P. P.
Abstract:: Antagonistic effects of Epicoccum purpurascens, Aureobasidium pullulans, Trichoderma spp., and Botrytis cinerea on establishment of Monilinia fructicola infections in cherry and peach blossoms were assessed in field and mist chamber studies. Conidia of each fungus were applied to blossoms that were subsequently inoculated with conidia of M fructicola. Mist chamber...
Resource Type:: Masters Thesis
Full Text:: forced cherry blossoms demonstrated that recovery of M. fructicola was significantly reduced (P=.05

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

Creator:: Tuori, Robert P.
Resource Type:: Dissertation
Full Text:: from Cultures of Pyrenophora tritici-repentis. Robert P. Tuori, Thomas J. Wolpert and Lynda M

Effects of fire on seedling establishment in upland prairies in the Willamette Valley, Oregon

Creator:: Maret, Mary P.
Abstract:: Prior to European settlement, native prairie dominated the landscape of the Willamette Valley. Today, due to urbanization, agriculture, and the cessation of burning, only isolated remnants of these grasslands still exist. In response to conservation concerns, there has been a move to restore the remaining prairies in the Willamette Valley,...
Resource Type:: Masters Thesis
Full Text:: in the Willamette Valley, Oregon AN ABSTRACT OF THE THESIS OF Mary P. Maret for the degree of

Quantitative Trait Loci Associated with the Tocochromanol (Vitamin E) Pathway in Barley

Creator:: Graebner, Ryan C., Wise, Mitchell, Cuesta-Marcos, Alfonso, Geniza, Matthew, Blake, Tom, Blake, Victoria C., Butler, Joshua, Chao, Shiaoman, Hole, David J., Horsley, Rich, Jaiswal, Pankaj, Obert, Don, Smith, Kevin P., Ullrich, Steven, and Hayes, Patrick M.
Abstract:: The Genome-Wide Association Studies approach was used to detect Quantitative Trait Loci associated with tocochromanol concentrations using a panel of 1,466 barley accessions. All major tocochromanol types- α-, β-, δ-, γ-tocopherol and tocotrienol- were assayed. We found 13 single nucleotide polymorphisms associated with the concentration of one or more of...
Resource Type:: Article
Full Text:: alternative strategy to improve vitamin E status. J Plant Physiol. 2004; 162:834–843. 4. Gey FK, Puska P

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

Integration of Evolutionary Theory and Genomics to Understand Processes Involved in Host Adaptation and Divergence in Phytophthora Plant Pathogens

Creator:: Tabima, Javier F.
Abstract:: Modern plant pathology benefits from integrating methods and concepts from evolutionary biology. For example, evolutionary concepts are used to identify and examine species boundaries of plant pathogens, recognize processes underlying pathogen biogeography, identify traits that characterize emerging species, and discover new molecular interactions that originate under processes of selection. In...
Resource Type:: Dissertation
Full Text:: Niklaus J. Grünwald Modern plant pathology benefits from integrating methods and concepts from

Host jumping onto close relatives and across kingdoms by Tyrannicordyceps (Clavicipitaceae) gen. nov. and Ustilaginoidea_(Clavicipitaceae)

Creator:: Kepler, Ryan M., Sung, Gi-Ho, Harada, Yukio, Tanaka, Kazuaki, Tanaka, Eiji, Hosoya, Tsuyoshi, Bischoff, Joseph F., and Spatafora, Joseph W.
Abstract:: Premise of study: This research seeks to advance understanding of conditions allowing movement of fungal pathogens among hosts. The family Clavicipitaceae contains fungal pathogens exploiting hosts across three kingdoms of life in a pattern that features multiple interkingdom host shifts among plants, animals, and fungi. The tribe Ustilaginoideae potentially represents...
Resource Type:: Article
Full Text:: . F. , P. CHAVERRI , AND J. F. WHITE . 2005 . Clarifi cation of the host

Studies on the bacterial gummosis of stone fruits

Creator:: Van Gundia, Gordon Keller
Resource Type:: Masters Thesis
Full Text:: $ J Q . C ) C V " 1 ' i C D o o b - 3 p o J' - J ' - l ' - J ' - a ' . L

The phylogenetic placement of hypocrealean insect pathogens in the genus Polycephalomyces: An application of One Fungus One Name

Creator:: Kepler, Ryan, Ban, Sayaka, Nakagiri, Akira, Bischoff, Joseph, Hywel-Jones, Nigel, Owensby, Catherine Alisha, and Spatafora, Joseph W.
Abstract:: Understanding the systematics and evolution of clavicipitoid fungi has been greatly aided by the application of molecular phylogenetics. They are now classified in three families, largely driven by reevaluation of the morphologically and ecologically diverse genus Cordyceps. Although reevaluation of morphological features of both sexual and asexual states were often...
Resource Type:: Article
Full Text:: Polycephalomyces: An application of One Fungus One Name Ryan KEPLERa,*, Sayaka BANb, Akira NAKAGIRIc, Joseph

An investigation of vegetation : hydrology interactions in watershed 1 at the H.J. Andrews Experimental Forest

Creator:: Bredensteiner, Kim C.
Abstract:: For management purposes, it would be useful to be able to predict streamflow response to forest practices in small, unmonitored basins. The primary objective of this study is to investigate the influence of early successional vegetation on summer streamflow levels. The long-term data records from watershed 1 at the H.J....
Resource Type:: Masters Thesis
Full Text:: Abstract Approved: Ronald P. Neilson For management purposes, it would be useful to be able to predict

Rhizoctonia of the potato

Creator:: Corsaut, Jesse Harrison
Resource Type:: Masters Thesis
Full Text:: ) Bombarory described a Rhizoctonia sp. which was the cause of a disease of asparagus. P. Balliard,(5

Analysis and prediction of patterns in lichen communities over the western Oregon landscape

Creator:: Peterson, Eric B.
Abstract:: The diverse lichen flora of the Pacific Northwest is being impacted by population growth and by forest management practices. Accumulating information about our lichen flora will improve our conservation strategies. This dissertation first collects information to improve our understanding of how lichen communities vary among forests of differing structure, and...
Resource Type:: Dissertation
Full Text:: (Vainio) Vainio CLATRA P 10 8 T Esslingeriana idahoensis (Essi.) Hale & M. ESSIDA P 2 10 E J. Lai

The role of Verticillium albo-atrum Reinke and Berth in seed transmission and induction of a latent disease of Pelargonium

Creator:: Koocheki, Hormozdyar Khodadad
Abstract:: Many initially healthy Pelargonium seedlings developed symptoms of Verticillium wilt in an Oregon State University greenhouse when they attained blooming age. The symptoms first appeared in May as "edge burning," yellowing, and wilting of leaves. In late summer, these seedlings which were the offspring of Verticillium infected plants, became severely...
Resource Type:: Masters Thesis
Full Text:: a learned and under- standing director, Dr. Roy A. Young. The writer wishes to thank Dr. Frank P

Peach blight as caused by Coryneum beijerinckii

Creator:: Scherer, Christopher Marion
Resource Type:: Masters Thesis
Full Text:: also the cherries (Pru.nus cerasus Linn and P. aviurn Linn.), and the pliun (P. domestica Lirn

The association of epiphytic macrolichens and bryophytes with riparian stand types along a valley continuum, Oregon Coast Range

Creator:: Ruchty, Andrea M.
Abstract:: I surveyed epiphytic macrolichens and bryophytes in six stands in each of seven riparian stand types in the Oregon Coast Range. This study (Chapter 2) describes the association of epiphytes with stand types and the corresponding potential of forest canopy conversions to affect epiphyte communities. Species composition, diversity, and representation...
Resource Type:: Masters Thesis
Full Text:: Valley Continuum, Oregon Coast Range. Abstract Approved: Bruce P. McCune I surveyed epiphytic

Some crown gall inoculation experiments with special reference to the stomata as possible ports of entry

Creator:: Patty, Frank Alexander
Resource Type:: Masters Thesis
Full Text:: of P. J. hiker, I. E. kelhus, and oters much interest has been stimul,ted towards the subject of

The comparative value of formaldehyde and of various chemical dusts for the control of onion smut

Creator:: Bedwell, Jesse Leonard
Resource Type:: Masters Thesis
Full Text:: , L. H. Famnel and C. M. King of Iowa, I. J. Anderson of Massachusetts, and T. Whitehead of England

The response of mechanical tissue to tension in the pedicel of apple

Creator:: Horn, Elsa Ottilia
Resource Type:: Masters Thesis
Full Text:: ',7LEDEMENTS VIith sincere gratitude and esteem may I acknov.1ede the help of Professor H. P. l3arss, who

Vascular and nonvascular vegetation of the Caldera of Mt. Aniakchak, Alaska

Creator:: Hasselbach, Linda M.
Resource Type:: Masters Thesis
Full Text:: . Computational methods of multivariate analysis in physical geography. J. Wiley & Sons, London. 532 p. McCune, B

Schlerotinia rot of leguminous plants

Creator:: Elmer, Otto Herman
Resource Type:: Masters Thesis
Full Text:: itself so that it P- -7- becomes very conspicuous even if it be present unless un- usually

Candidate Genes Associated with Blister Rust Resistance in Whitebark Pine (Pinus albicaulis) Revealed through de novo Transcriptome Assembly and Differential Gene Expression Analysis

Creator:: Bair, Zolton J.
Abstract:: Whitebark pine (Pinus albicaulis) is an iconic North American high-elevation tree species currently threatened by climate change, mountain pine beetle, and white pine blister rust (WPBR), a lethal disease caused by the non-native fungal pathogen Cronartium ribicola. In collaboration with the USDA Forest Service Dorena Genetic Resource Center, germplasm was...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Zolton J. Bair for the degree of Doctor of Philosophy

Ecological thresholds, climate extremes, and tree species' distributions across the Pacific coastal United States

Creator:: Lintz, Heather E.
Abstract:: Species' distributions across the landscape are perhaps the least understood yet most conspicuous features of life on earth. Ecologists have long studied species' distributions; yet, many questions remain about why species occur where they do. Such questions persist largely because species' distributions are complex systems with challenging properties like non-linearity,...
Resource Type:: Dissertation
Full Text:: denotes a response point within a spider, and i and j index the point on a uniform grid. To give the

The effects of univalent cations on the inductive formation of nitrate reductase

Creator:: Nitsos, Ronald Eugene
Abstract:: An investigation was undertaken to determine whether potassium is indeed necessary for the in vivo synthesis of a specific protein. The effects of univalent cations on the inductive formation of nitrate reductase and on the level of activity of representative non-adaptive enzyme are presented. Cultures of Neurospora crassa were grown...
Resource Type:: Masters Thesis
Full Text:: wishes to express his sincere apprecia tion to Dr. Harold J. Evans for his encouragement and for his

Forecasting Pseudocercosporella herpotrichoides foot rot of winter wheat

Creator:: Grybauskas, Arvydas P.
Abstract:: The use of fungicides for the control of foot rot of winter wheat, caused by Pseudocercosporella herpotrichoides (Fron) Dei., requires a forecast of disease risk to optimize this management practice ecologically and economically. Foot rot occurs in both the mild, wet (100+ cm, ppt./year) annual cropped areas in western Oregon,...
Resource Type:: Dissertation
Full Text:: Atmospheric Adm., Environmental Data Service. 10 p. BRUEHL, G. W., and J. B. MANANDHAR. 1972. Some water

The detection of ilarvirus (subgroup B) by enzyme-linked immunosorbent assay

Creator:: McMorran, Jeffrey P.
Abstract:: The reliability and sensitivity of enzyme-linked immunosorbent assay (ELISA) in the detection of ilarvirus (isometric labile ringspot virus) subgroup B and prune dwarf virus (PDV) isolates in Prunus and Malus species has been well established. To use this technique in large scale virus indexing programs more information was required on...
Resource Type:: Masters Thesis
Full Text:: ) Batsch. var. Maryland MD RS-17 PRSV J. Dwarf Blood P. persica (L) Batsch. var. JD Blood NJ RS-18 PRSV

The reproductive ecology of the pacific yew (Taxus brevifolia nutt.) under a range of overstory conditions in western Oregon

Creator:: DiFazio, Stephen P.
Abstract:: The influence of overstory openness on the reproductive ecology of Pacific yew (Taxus brevifolia Nutt.) was investigated on 4 sites in western Oregon over 2 years. The breeding system of T. brevifolia was found to deviate from pure dioecy under a broad range of canopy and site conditions. Production of...
Resource Type:: Masters Thesis
Full Text:: Stephen P. DiFazio for the degree of Master of Science in Botany and Plant Pathology presented on May 5

Comparative epidemiology of Phytophthora diseases of Rhododendron

Creator:: Taylor, Clare Rebecca
Abstract:: Rhododendron species are host to many Phytophthora species and are an important crop in the nursery industry. The foliar epidemiology of twelve Phytophthora diseases on Rhododendron was studied in field and growth chamber experiments on two Rhododendron cultivars. The relative aggressiveness of Phytophthora spp. was assessed using disease incidence, severity,...
Resource Type:: Masters Thesis
Full Text:: P., Krug J., Lane C.E., Lewis L.A., Lodge J., Lynn D.H., Mann D.G., McCourt R.M., Mendoza L

Postemergence herbicides and take-all disease in winter wheat : alterations in the incidence and severity of disease and crop growth

Creator:: Geddens, Ray M.
Abstract:: Eight postemergence herbicides were evaluated to determine their influence on the incidence and severity of take-all disease caused by the fungus Gaeumannomyces graminis var. tritici in winter wheat. Mecoprop ((+)-2-(4-chloro-2-methylphenoxy)propanoic acid), difenzoquat (1,2- dimethyl- 3,5- diphenyl -1H- pyrazolium), dinoseb amine (amine salt of 2-(1-methylpropy1)-4,6-dinitrophenol), and diclofopmethyl (methyl ester of (+)-2-[4-(2,4-dichlorophenoxy)...
Resource Type:: Dissertation
Full Text:: : Redacted for Privacy Arnold P. Appleby Redacted for Privacy Robert L. Powelson Eight postemergence

Comparison of the water relations characteristics of woody plants in western Oregon

Creator:: Davis, Kent J.
Abstract:: I studied the water relations traits, twig conductivity, C'3 isotopic composition, and wood density of three conifer and five angiosperm species in western Oregon. This study took place from spring 2002 to fall 2003 on four sites. Species were selected to represent the diversity of drought tolerance of woody plants...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF Kent J. Davis for the degree of

Epidemic Dynamics of Sudden Oak Death in the Forests of Oregon

Creator:: Carson, Adam
Abstract:: Sudden Oak Death (SOD) is a forest disease caused by the oomycete pathogen Phytophthora ramorum, and infects trees in the Western United States and Europe. This generalist pathogen can infect over 130 species of plants, and causes rapid mortality in tree species in the Fagaceae. Sexual reproduction is thought to...
Resource Type:: Masters Thesis
Full Text:: :227–241. Carleson, N. C., Daniels, H. A., Reeser, P. W., Kanaskie, A., Navarro, S. M., LeBoldus, J

Below ground biology of Botrychium pumicola (Ophioglossaceae)

Creator:: Camacho, Francisco J.
Resource Type:: Dissertation
Full Text:: Botrych;um pum;cola (Ophioglossaceae) by Francisco J. Camacho A THESIS submitted to Oregon State

A taxonomic revision of Astragalus mokiacensis and allied taxa within the Astragalus lentiginosus complex of Section Diphysi

Creator:: Alexander, J. Andrew
Abstract:: North America, with over 400 species of Astragalus (Fabaceae), is one of three major centers of diversity, all of which comprise the majority of the nearly 1750 species of Astragalus worldwide. One of the most diverse species, Astragalus lentiginosus of Section Diphysi, is a polymorphic complex of over 40 varieties,...
Resource Type:: Dissertation
Full Text:: THESIS OF J. Andrew Alexander for the degree of Doctor of Philosophy in Botany and Plant Pathology

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

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

Conservation biology of Plagiobothrys hirtus (Boraginaceae) : evaluation of life history and population enhancement

Creator:: Amsberry, Kelly
Abstract:: Plagiobothrys hirtus (Boraginaceae) is a state and federally listed endangered plant found only in Douglas County, Oregon. This vernal pool endemic has historically been threatened by agricultural conversion of seasonal wetlands in the Sutherlin area, and is currently being eradicated as habitat is lost due to the rapid urban development...
Resource Type:: Masters Thesis
Full Text:: cultivation and transplantation of P. hirtu will be useful for future reintroduction projects, as will the

A revision of Juncus subgenus genuini (Juncaceae) in the Pacific states

Creator:: Lint, Harold LeRoy
Abstract:: A study was made of the subgenus Genuini of the genus Juncus in the Pacific States, California, Oregon and Washington. Extensive morphological comparisons, geographical distributions, habitat differences and observations of apparent presence or absence of natural hybrids provided the major data sources. Cytological studies were made, but were inconclusive. Eleven...
Resource Type:: Dissertation
Full Text:: Z0 r c i r c i 7 : i - e i " c i T J rc l .-ci 4-) - c : i P (I)di -U Lc) 0 0 0 0 o 0 0 w a on 0 cssi

Phylogeography and Evolution of Effector Genes in Phytophthora Species

Creator:: Shakya, Shankar K.
Abstract:: Plant pathogens in the genus Phytophthora are known to cause disease on field crops, nursery plants, and forest trees. The best known example probably is Phytophthora infestans, which triggered the infamous Irish potato famine. Other important Phytophthora species include: P. ramorum (sudden oak death pathogen), P. sojae (soybean root rot...
Resource Type:: Dissertation
Full Text:: . Abstract approved: ______________________________________________________ Niklaus J. Grünwald

Biosystematic studies of Phacelia capitata (Hydrophyllaceae), a species endemic to serpentine soils in southwestern Oregon

Creator:: Shelly, J. Stephen
Abstract:: Phacelia capitata Rruckeberg is a member of the Phacelia magellanica polyploid complex (species group Magellanicae), a group of wide-ranging, polymorphic perennials in western North America related to the South American P. secunda (= P. magellanica). The purpose of this project was to determine, to the extent possible, the interrelationships of...
Resource Type:: Masters Thesis
Full Text:: (Hydrophyllaceae), a Species Endemic to Serpentine Soils in Southwestern Oregon AN ABSTRACT OF THE THESIS OF J

Control of cytokinin autonomy in Phaseolus lunatus callus cultures

Creator:: Kim, Sang-Gu
Abstract:: The ability of N,N'-diphenylurea (DPU) to substitute for cytokininactive adenine derivatives in promoting callus growth of Phaseolus lunatus and Nicotiana tabacum has been examined. In general, DPU stimulated callus growth of P. lunatus at high concentrations and the growth of most callus tissues was irregular, while the response of tobacco...
Resource Type:: Dissertation
Full Text:: Callus Cultures. Abstract approved : Redacted for Privacy Dr. Donald J. Armstrong A!" 1. The ability

Laboratory studies of bacteriophagous nematodes as potential vectors of insect pathogens

Creator:: Wright, Billie Dean
Abstract:: Three species of bacteriophagous nematodes, Pristionchus lheritieri (Maupas) Paramanov, Pelodera chitwoodi (Bassen) Dougherty and Rhabditis sp. were studied to determine their potential roles as vectors of selected insect pathogens, Bacillus thuringiensis Berliner, Beauveria bassiana (Balsamo) Vuillemin, Metarrhizium anisopliae (Metchnikoff) Sorokin and a nuclear polyhedrosis virus of Trichoplusia ni Hubner. Chlorine...
Resource Type:: Dissertation
Full Text:: OF INSECT PATHOGENS Abstract approved: Redacted for Privacy o J. Jensen Three species of

Inferring Patterns and Processes of Emergence in Clonal Phytophthora Epidemics using Population Genomic Approaches

Creator:: Cauldron, Nicholas C.
Abstract:: Oomycete and fungal pathogens threaten food, fiber, and forests around the world. With climate change, these pathogens are expected to emerge more frequently. Evolution can facilitate their emergence through mechanisms such as mutations that change or expand host range. Characterizing evolutionary mechanisms in plant pathogens will contribute to our ability...
Resource Type:: Dissertation
Full Text:: . Abstract approved: ______________________________________________________ Niklaus J. Grünwald

The interactions of Pratylenchus penetrans with host plants, Longidorus elongatus and Verticillium dahliae

Creator:: Yorston, John McKay
Abstract:: The root-lesion nematode, Pratylenchus penetrans (Cobb 1917). Filipjev and Shuurmans Stekhoven, 1941, is widely distributed throughout Oregon and other temperate zones of the world. Economically it is probably the most important plant parasitic nematode in Oregon because of its abundance, wide host range of economic plants and interactions with other...
Resource Type:: Dissertation

Relationship of Pratylenchus penetrans (Cobb, 1917) population density and yield of peppermint, Mentha piperita L.

Creator:: Pinkerton, John Nelson
Abstract:: A root-lesion nematode, Pratvlenchus penetrans, was determined to be a major component of peppermint stand decline in Western Oregon. Regression analysis showed that P. penetrans root densities in August were negatively correlated (P=0.01) with yield, while soil densities in August and root and soil densities in April were poorly correlated...
Resource Type:: Dissertation
Full Text:: Western Oregon. Regression analysis showed that P,. penetrans root densities in August were negatively

Genome sequences of Phytophthora enable translational plant disease management and accelerate research

Creator:: Grünwald, Niklaus J.
Abstract:: Des séquences entières ou partielles de génomes deviennent de plus en plus accessibles. En ce qui concerne plusieurs systèmes plante-agent pathogène, nous abordons l’ère du recéquençage du génome. Les premiers génomes de Phytophthora, P. ramorum et P. sojae, ont été disponibles à partir de 2004, suivis de près par celui...
Resource Type:: Article
Full Text:: disease management and accelerate research Can. J. Plant Pathol. (2012), 34(1): 13–19 Symposium

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