My research interests include: understanding the biology, ecology and genetics of emerging tree/plant pathogenic fungi using population genetics and genomic methods, studying the interactions of plant and fungi that govern variation in host specialization, pathogenicity, and virulence, and understanding genomic drivers of fungal species delimitation and divergence with a focus on pathogens important to Colorado’s forests, shade and fruit trees, and forests worldwide.
Jessa Ata – MS in Entomology
John Dobbs – MS in Plant Pathology
Bradley Lalande – MS in Plant Pathology
K.A. Leddy – PhD in Cellular and Molecular Biology
Stephan Miller – MS in Plant Pathology
Rachael Sitz – PhD in Plant Pathology
BSPM-365: Integrated Tree Health Management
BSPM-521: Forest Health Issues
BSPM-530: Scientific Writing
Ritter, S.M., Hoffman, C.M., Stewart, JE, Zimmerman, T. 2017. The influence of prescribed crown fire on Lodgepole Pine Dwarf Mistletoe (Arceuthobium americanum) populations 33 years post-fire. Forest Pathology, In press.
Sitz, R., Snelling, J., Ibarra Caballero, J., Zerillo, M., Alexander, K., Tisserat, N., Cranshaw, W., Stewart, JE. 2017. Drippy blight disease of red oaks in Colorado caused by llokermes sp. and Lonsdalea quercina subsp. quercina. Arboriculture and Urban Forestry, In press.
Stewart, JE*, Ross-Davis, AL*, RN Graҫa, AC Alfenas, TL Peever, JW Hanna, E Pitman, JY Uchida, RD Hauff, CY Kadooka, M-S Kim, PG Cannon, S Namba, N Minato, S Simeto, CA Pérez, MB Rayamajhi, M Morán, DJ Lodge, M Arguedas, R Medel-Ortiz, MA López-Ramirez, P Tennant, M Glen, A McTaggart, NB Klopfenstein. 2017. Genetic diversity of Austropuccinia psidii in the Americas and Hawaii: Global implications for invasive threat assessments. Forest Pathology. DOI:10.1111/efp.12378
Jongbum, J, Ki-Tae K, H-J Song, G-W Lee, K Cheong, H Kim, G Choi, Y-H Lee, JE Stewart, NB Klopfenstein, M-S Kim. 2017. Draft Genome Sequence of the Fungus Associated with Oak-Wilt Mortality in South Korea, Raffaelea quercus-mongolicae KACC44405, Genome Announcements. https://doi.org/10.1128/genomeA.00797-17
Ritter S, Hoffman C, Ex S, Stewart, JE. 2017. Impacts of lodgepole pine dwarf mistletoe (Arceuthobium americanum) infestation on stand structure and fuel load in lodgepole pine dominated forests in central Colorado. Botany. 95: 307-231.
Klopfenstein NB, J.E. Stewart, Y Ota, JW Hanna, BA Richardson, AL Ross-Davis, RD Elías-Román, K Korhonen, N Keča, E Iturritxa, D Alvarado-Rosales, H Solheim, NJ Brazee, P Łakomy, MR Cleary, E Hasegawa, T Kikuchi, F Garza-Ocañas, P Tsopelas, D Rigling, S Prospero, T Tsykun, JA Bérubé, FOP Stefani, S Jafarpour, V Antonín, M Tomšovský, GI McDonald, S Woodward, M-S Kim. 2017. Insights into the phylogeny of Northern Hemisphere Armillaria: split-network and Bayesian analyses of translation elongation factor 1-α gene sequences. Mycologia. 109: 75-91.
Sitz, R.A., Luna, E.K., Ibarra Caballero, J., Tisserat, N.A., Cranshaw, W.S., Stewart, J.E. 2017. Virulence of genetically distinct Geosmithia morbida isolates to black walnut and their response to co-inoculation with Fusarium solani. Plant Disease. 101: 116-120.
Stewart, JE, K. Otto, Cline, G.A., Dumroese, R.K., Klopfenstein, N.B. Kim, M.-S. 2016. First Report of Fusarium proliferatrum causing Fusarium root disease on sugar pine (Pinus lambertiana) in a forest container nursery in California. Plant Disease. Accepted.
Kolb, T.E., Fettig, C.J., Bentz, B.J., Stewart, JE, Weed, A.S., Hicks, J.A., Aryes, M.P. 2016. Observed and anticipated impacts of drought on forests insects and diseases in the United States. Forest Ecology and Management.
Glenn, A.T., Davis, B., Minglu, G., Gold, S.E., Mitchell, T., Proctor, R., Stewart, J.E., Snook, M., 2016. Two horizontally transferred xenobiotic resistance gene clusters associate with detoxification of benzoxazolinones by Fusarium species. PlosOne.
Stewart JE, Brooks K, Brannen PM, Cline WO, Brewer MT. 2015. Elevated genetic diversity found in the emerging pathogen of blueberry Exobasidium maculosum. PlosOne. 10(7): e0132545.
Stewart JE, Turner AN, Brewer MT. 2015. Evolutionary history and variation in host range in the Didymella bryoniae/Stagonosporopsis caricae species complex pathogenic to curcurbits and papaya. Fungal Biology. 119: 370-182.
Huang F, Fu Y, Nie D, Stewart JE, Peever TL, Li H. 2015. Phylogeographic analysis of Alternaria alternata causing brown spot of tangerines in China reveals previously unknown diversity. Fungal Biology. 119: 320-330.
Stewart JE, Kroese D, Tabima JF, Larsen MM, Press CM, Zasada I, Grünwald NJ. 2014. Phytophthora rubi isolates collected from raspberry (Rubus idaeus) in the Western United States show no differentiation in pathogenicity, fungicide resistance or genetic structure. Plant Disease. 98: 1702-1706.
Schoebel CN, Stewart JE, Grünwald NJ, Prospero S. 2014. Population history and pathways of spread of the plant pathogen Phytophthora plurivora. PlosOne. e85368.
Stewart JE, Timmer LM, Lawrence CB, Pryor BM, Peever TL 2014. Discord between morphological and phylogenetic species boundaries: incomplete lineage sorting and recombination results in fuzzy species boundaries in an asexual fungal pathogen. BMC Evolutionary Biology. 1: 38.
Stewart JE, Thomas KA, Lawrence CB, Pryor BM, Peever TL. 2013. Signatures of recombination in clonal lineages of the citrus brown spot pathogen, Alternaria alternata. Phytopathology. 103: 741-749.
Stewart JE, Andrew M, Bao X, Chilvers MI, Carris LM, Peever TL. 2013. Development and utility of sequence characterized amplified genomic regions for lower-level fungal systematics: Proof of principle using Alternaria, Ascochyta and Tilletia. Mycologia. doi: 10.3852/12-287.
Ross-Davis AL, Stewart JE, Hanna JW, Kim M-S, Cronn R, Rai H, Richardson BR McDonald GI, Klopfenstein NB. 2013. Transcriptome characterization of an Armillaria root disease pathogen reveals candidate pathogenicity-related genes. Forest Pathology. doi: 10.1111/efp.12056
Stewart JE, Abdo Z, Dumroese RK, Klopfenstein NB, Kim M-S. 2012. Pathogenicity of Fusarium oxysporum and F. commune to Douglas-fir (Pseudotsuga menziesii) seedlings. Forest Pathology. DOI: 10.1111/j.1439-0329.2011.00746.x.
Stewart JE, Kawabe M, Abdo Z, Arie T, Peever TL. 2011. Contrasting codon usage patterns and purifying selection at the mating locus in putatively asexual Alternaria fungal species. PLoS One. 6: e20083.
Chilvers MI, Rogers JD, Dugan FM, Stewart JE, Chen W, Peever TL. 2009. Didymella pisi sp. nov., the teleomorph of Ascochyta pisi. Mycological Research. 113: 391-400.
Stewart JE, Kim, M-S, James RL, Dumroese RK, Klopfenstein NB. 2006. Molecular characterization of Fusarium oxysporum and Fusarium commune from a conifer nursery. Phytopathology. 96.1124-1133.
Rippy RC; Stewart JE; Zambino PJ; Klopfenstein NB.; Tirocke JM; Kim M-S; Thies WG. 2005. Root diseases in coniferous forests of the Inland West: potential implications of fuels treatments. Gen. Tech. Rep. RMRS-GTR-141. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 32 p.
Stewart JE, Halik S, Bergdahl DR. 2004. Viability of Sirococcus clavigignenti juglandacearum conidia on exoskeletons of three coleopteran species. Plant Dis. 88:1085-1091.