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Theses/Dissertations from 2021

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Biological and molecular insights on MLA-based resistance of barley to powdery mildew derived from investigation of an in-frame Lys-Leu deletion in the essential protein SGT1, Antony Victor Ernest Chapman

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Light as a global regulator of gene expression and an anticipatory signal for environmental water loss in Pseudomonas syringae, Bridget M. Hatfield

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The effects of winter rye cover crop on corn seedling disease, corn growth and development in respects to winter rye seeding spacing, Sarah Maria Kurtz

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Estimation of soybean radiation use efficiency with the help of UAV imagery to evaluate the impact of frogeye leaf spot on yield and the effect of fungicides., Xavier Alaric Phillips

Theses/Dissertations from 2020

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Approaches to sustainable management of sudden death syndrome of soybean, Joshua Winaya Budi

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Decoding the translation initiation mechanism of maize chlorotic mottle virus, Elizabeth Jacqueline Carino

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Metabolomic characterization and quantitative genetic dissection of cuticular surface lipid accumulation on the stigmatic surfaces of maize, Tesia Dennison

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Nanoparticle encapsulation to enhance seed treatment efficacy against Fusarium graminearum, Fernando Mauri Marcos

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Exploring the genetic basis for host specific virulence and pathogenicity in Erwinia tracheiphila, Olakunle Olawole

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Comparison of fungicide application technology: Relationship between coverage and disease severity and the physiological impact of fungicides on grainfill, Andrew James Penney

Theses/Dissertations from 2019

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Studies on the impact of cover crops on soybean productivity and root diseases, Grazieli Da Araldi Da Silva

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The molecular interactions of soybean circadian clock with abiotic stresses and soybean cyst nematode (Heterodera glycines), Lijun Cao

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Development of an aptamer-based nanosensor for SA detection and exploration of the role of SA in stress granules formation, Changtian Chen

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Investigating the interactions between cover crops and the soybean cyst nematode through lab, greenhouse, and field studies, Chelsea Jean Harbach

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Biocontrol potential of Bradyrhizobium japonicum against soybean sudden death syndrome, Tra Thi Thanh Huynh

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Interactions between Aspergillus flavus and stored-grain insects in conventional and transgenic maize, Julie Aiza L. Mandap

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Disease and insect pest management in organic cucurbit production, Hayley Nelson

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Modeling yield loss due to soybean sudden death syndrome at different spatial scales, Muhammad Mohsin Raza

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The impact of fungicide application method on soybean canopy coverage, disease, yield, seed quality, and seed fill duration., Joshua Viggers

Theses/Dissertations from 2018

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Molecular mechanisms governing plant parasitic nematode signaling and host parasitism, Stacey Nicola Barnes

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Biological roles of small RNAs expressed during infection of barley by the obligate fungal biotroph, Blumeria graminis f. sp. hordei, Matthew Robert Hunt

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Genomic analysis of quantitative disease resistance during maize-hemibiotrophic leaf blight pathogen interaction, Mercy Kasuzi Kabahuma

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Biosurveillance utilizing engorged ticks as phlebotomists for xenodiagnosis, Charles Elliott Lewis

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Co-adaptations between Ceratocystidaceae ambrosia fungi and the mycangia of their associated ambrosia beetles, Chase Gabriel Mayers

Theses/Dissertations from 2017

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Development of methods to study plant-parasitic nematode chemotaxis and the effect of ILeVO and VOTiVO seed treatments on the soybean cyst nematode, Heterodera glycines, Augustine Quirarte Beeman

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Soybean root rot caused by Fusarium oxysporum and Fusarium graminearum: interactions with biotic and abiotic factors, David Ricardo Cruz Jimenez

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Effects of nematicidal seed treatments on the biology of the soybean cyst nematode, Heterodera glycines, Jared Paul Jensen

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Soybean-Pythium pathosystem: Search for host resistance and interaction with Fusarium species, Elizabeth Rose Lerch

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Sooty blotch and flyspeck: Taxonomy, ecology, and management, Hafizi Rosli

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Efficacy of soybean seed treatments in Iowa and the effect of cold stress on damping-off caused by Pythium sylvaticum, Mauricio Serrano

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Effect of seed treatments and soybean cultivars on root rot caused by Fusarium virguliforme, Daniel Allan Sjarpe

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Membrane trafficking in resistance gene-mediated defense against the barley powdery mildew fungus, Priyanka Surana

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Utilization of polyanhydride nanoparticle encapsulated fungicide seed treatments against seedborne and soilborne Fusarium graminearum on maize, Lauren Alicia Washington

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The root-associated microbiome and agricultural nitrogen use efficiency, Cassandra Wattenburger

Theses/Dissertations from 2016

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Factors affecting expression of soybean sudden death syndrome: Flooding, oxygen level, and ethylene hormone, Noor Abdelsamad

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Soybean vein necrosis virus: impacts of infection on yield loss and seed quality and expansion of plant host range, Melissa Irizarry

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Studies on cover crops and sudden death syndrome of soybean, Renan Kobayashi-Leonel

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On the molecular biology and evolution of plant parasitism by nematodes, Jason Brett Noon

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The effect of fungicides and pod removal alone or in combination on green stem disorder of soybean and further investigation of genetic components, Xavier Phillips

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Genetic variation in native populations of the laurel wilt pathogen, Raffaelea lauricola, in Taiwan and Japan and the introduced population in the USA, Caroline Elizabeth Wuest

Theses/Dissertations from 2015

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The role of Fusarium mycotoxins in seedling infection of soybeans, wheat and maize, Tracy L. Bruns

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Use of NGS for discovery of viruses in the soybean aphid, Ying Feng

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Raffaelea spp. from five ambrosia beetles in the genera Xyleborinus and Cyclorhipidion (Coleoptera: Curcurlionidae: Scolytinae: Xyleborini), Yeganeh Gharabigloozare

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Ribosomal frameshifting directed by a potyvirid sequence motif in diverse translation systems, Alice Y. Hui

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Bacterial wilt of cucurbits: impact of plant age on symptom progression and pathogen movement and locating genes associated with host preference and pathogenesis in E. tracheiphila, Qian Liu

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Elucidation of a bacteriophytochrome-regulated signal transduction pathway in Pseudomonas syringae that contributes to leaf colonization, virulence, and swarming motility, Regina S. McGrane

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The role of plant-derived quaternary ammonium compounds, including carnitine and choline-O-sulfate, on the biology of the plant pathogen Pseudomonas syringae and its interactions with the host species Phaseolus vulgaris, Michael David Millican

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Emerging issues in the U.S. Corn Belt: infection of corn by Clavibacter michiganensis subsp. nebraskensis and use of foliar fungicides to protect yield, Salome Mallowa Obura

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Seedborne black Aspergillus species as maize seedling pathogens: role of fumonisin production and interaction with soilborne Pythium species, Laura Kaelia Weieneth

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Ecological specialization of Tubakia iowensis, and searching for variation in resistance to bur oak blight, Ashley Marie West

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Detection and management of Colletotrichum acutatum sensu lato on strawberry, Xiaoyu Zhang

Theses/Dissertations from 2014

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Real-time PCR analysis of maize seedlings for assessment of seed treatment efficacy and genetic resistance to infection by Sphacelotheca reiliana, Samuel James Anderson

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Deciphering the genetic architecture of native resistance and tolerance to western corn rootworm larval feeding, David Alan Hessel

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Phenology of infection on apple fruit by sooty blotch and flyspeck species in Iowa apple orchards and phylogenetic analysis to assess the evolutionary origins of sooty blotch and flyspeck on apple, Siti Izera Ismail

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Influence of Heterodera glycines infection, plant age and water availability on foliar symptoms of sudden death syndrome, root symptom severity and root morphology of soybean plants infected by Fusarium virguliforme, Nenad Tatalović

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Hydrating the Pseudomonas aeruginosa periplasm under desiccating conditions, Seth James Wenner

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Effects of ILeVO® on soybean sudden death syndrome and soybean cyst nematode, Edward R. Zaworski

Theses/Dissertations from 2013

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Studies on extraction and control of plant-parasitic nematodes on corn, Mychele Batista da Silva

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Fumonisin content in conventional versus Bt maize and implications of fumonisin contamination on fuel ethanol yield and DDGS quality, Erin Louise Bowers

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The Turnip mosaic virus and its effects on Arabidopsis thaliana gene expression, Brian Anthony Campbell

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Computational and experimental analysis of TAL effector-DNA binding, Erin Lynn Doyle

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Natural and engineered resistance triggered by TAL effectors of Xanthomonas oryzae, Aaron Hummel

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Sooty blotch and flyspeck disease of apple: expansion of the fungal complex in Turkey and evaluation of a warning system for the Upper Midwest, Derrick Anthony Mayfield

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Determination and quantification of surface lipid metabolites in maize silks: A pathway model for surface lipid biosynthesis based on simultaneous profiling of polar and non-polar metabolites, Layton Andrew Peddicord

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Identification and characterization of effectors secreted from sedentary endoparasitic phytonematodes, William Brock Rutter

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Bacterial wilt of cucurbits: Ecology, genetics, and management, Erika Saalau Rojas

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Characterization of a cell death suppressing effector broadly conserved across the fungal kingdom, Ehren Lee Whigham

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Characterization of multiple regulatory networks and responses to environmental signals in Pseudomonas syringae during its association with plants, Xilan Yu

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Effect of infection site and glyphosate application on the foliar symptoms expression of soybean sudden death syndrome, Marcio Leizer Zaccaron

Theses/Dissertations from 2012

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Fusarium species infecting soybean roots: Frequency, aggressiveness, yield impact and interaction with the soybean cyst nematode, Maria Mercedes Diaz Arias

Theses/Dissertations from 2011

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The effect of fungicides on soybean in Iowa applied alone or in combination with insecticides at two application growth stages on disease severity and yield, Nathan Bestor

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An epidemiological comparison of the US and Canadian Plum pox virus eradication programs, Andrew Gougherty

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A look into the molecular mechanisms of parasitism including the functional characterization of Heterodera schachtii secreted effector proteins and the response of plant small RNA to nematode infection, Peter Jacob Howe

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Characterization and management of genetic diversity in Phytophthora sojae populations, Silvina Maria Stewart

Theses/Dissertations from 2010

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Interactions between lesion nematodes and corn pathogens, Marcos Paulo Da Silva

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Epidemiological studies on the infection process and symptom expression of soybean sudden death syndrome, Carlos Cecilio Gongora-canul

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Improved seed health tests for Xanthomonas axonopodis pv. phaseoli in common bean, Yiqing He

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Functional characterization of Arabidopsis genes changing expression during cyst nematode Heterodera schachtii infection, Jing Jin

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Ophiostomatales isolated from two European bark beetles, Hylurgus ligniperda and Orthotomicus erosus, in California, Sujin Kim

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Quantifying the aggressiveness, temporal and spatial spread of Pantoea stewartii in sweet corn, Lu Liu

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Genetic characterization of the partial restorer of fertility gene, Rf8, in T cytoplasm maize, Julie Marie Meyer

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The regulation of host translation initiation in plant-pathogen interactions, Jackson Russell Moeller

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Deciphering the transcriptional regulation and response of barley to obligate fungal biotroph invasion, Matthew James Moscou

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Novel components of Pseudomonas putida biofilm exopolymeric matrix and a transcriptome analysis of the effects of osmotic and matric stress, Lindsey Nielsen

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Interactions among viruses, insect vectors and the Phomopsis complex in soybean, and effects of integrated management strategies, Jose Pablo Soto-arias

Theses/Dissertations from 2009

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The role of water stress in plant disease resistance and the impact of water stress on the global transcriptome and survival mechanisms of the phytopathogen Pseudomonas syringae, Brian Carl Freeman

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Evaluation of the expression of water stress-responsive Pseudomonas syringae genes during plant infection and in the presence of low osmotic versus low matric potential in culture, Kelly Crowley Peterson

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Assessing new methods of integrated pest management for apple orchards in the Midwest and phenology of sooty blotch and flyspeck fungi on apples in Iowa, Adam Sisson

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Sooty blotch and flyspeck: Evaluation of remotely estimated weather inputs to disease-warning systems and delineation of fungal taxa closely grouping with Mycosphaerella madeirae, Nenad -. Tatalovic

Theses/Dissertations from 2008

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Bean pod mottle virus: Spatial and temporal dynamics at different spatial scales and the impact of time of infection on soybean yield and quality, Emmanuel Byamukama

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Epidemiological studies of shading effects on Asian soybean rust, Ana Paula da Silva Dias

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Soybean mosaic and stem canker in Iowa soybean fields, Xin Lu

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Biotic and abiotic factors associated with Fusarium ear rot of maize caused by Fusarium verticillioides, Michael Wayne Parsons

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Interaction of fungicide seed treatments and the Fusarium-maize (Zea mays L.) pathosystem, Carlos Rodriguez-Brljevich

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A negative regulator of ribosomal RNA processing specifies R-gene-independent cell death in barley - powdery mildew interactions, Liu Xi

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Overwinter survival of Sclerotium rolfsii and S. rolfsii var. delphinii, screening hosta for resistance to S. rolfsii var. delphinii, and phylogenetic relationships among Sclerotium species, Zhihan Xu

Theses/Dissertations from 2007

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Phytophthora root and stem rot of soybean in Iowa: minimizing losses through an improved understanding of population structure and implementation of novel management strategies, Sarah Marie Cerra

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Sooty blotch and flyspeck of apple: assessment of an RFLP-based identification technique and adaptation of a warning system for the Upper Midwest, Katrina Beth Duttweiler

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Soybean rust in the United States: assess its potential epidemic ranges and frequency based on disease limiting factors, disease attributes, and comparative epidemiology, Xun Li

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Alternative hosts of Phakopsora pachyrhizi in the Americas: an analysis of their role in the epidemiology of Asian soybean rust in the continental U.S., Oscar Pérez-Hernández