David M. Geiser, Ph.D.

David M. Geiser, Ph.D.

  • Professor of Mycology
  • Director, Fusarium Research Center
121 Buckhout Lab (office)
118/119 Buckhout Lab (lab)

University Park, PA 16802

Areas of Expertise

  • Fusarium and Aspergillus
  • Fungal genetics
  • Fungal systematics and evolution
  • Fungal plant and animal pathogens

Education

  • B.A., Ecology and Evolutionary Biology, Northwestern University, Evanston, IL, 1987
  • Ph.D., Genetics, University of Georgia, Athens, GA, 1995
  • Postdoctoral, University of California, Berkeley, CA, 1998

Areas of Interest

Molecular evolutionary genetics of pathogenic and toxigenic fungi

Program Interests

Research in my lab focuses on the molecular evolutionary genetics of fungi, mostly in the realm of molecular phylogenetics and systematics at the species level. We apply these tools mostly to identify and better understand the fungal culprits in plant and animal diseases and toxicoses. Unfortunately, identifying fungi using traditional micromorphological tools is very difficult, and tends to lead to species concepts that are too broad. We use the tools of multilocus molecular phylogenetics to recognize and identify species, which provides a much more objective and reliable framework for understanding the biology of these fungi.

As Director of the Fusarium Research Center at Penn State, I also curate the world's largest collection of cultures of Fusarium, one of the most important genera of toxigenic and pathogenic fungi. We are nearing 20,000 accessions and provide isolates to certified researchers, and also provide identification and other services. Most of the research in my lab naturally involves this important genus, but I am also involved in projects in a variety of other fungi.

Recent Publications

Magdama F, Monserrate-Maggi LS, Sosa D, Geiser DM, Jimenez-Gasco MM (2019). Comparative analysis uncovers the limitations of current molecular detection methods for Fusarium oxysporum f.sp. cubense Race 4 strains. PLoS One 14:e0222727.

 

Smyth CW, Sarmiento-Ramirez JM, Short DPG, Dieguez-Uribeondo J, O'Donnell K, Geiser DM (2019). Unraveling the ecology and epidemiology of an emerging fungal disease, sea turtle egg fusariosis (STEF). PLoS Pathogens 15:e1007682. (PLoS Pearls contribution)

 

Aoki T, Smith JA, Kasson MT, Freeman S, Geiser DM, Geering ADW, O'Donnell K (2019) Three novel Ambrosia Fusarium Clade species producing clavate macroconidia known (F. floridanum and F. obliquiseptatum) or predicted to be farmed by Euwallaceae spp. (Coleoptera: Scolytinae) on woody hosts. Mycologia 111: 919-935.

 

Wingfield BD, Fourie A, Simpson MC, Bushula-Njah VS, Barnes I, Coetzee MF, Dreyer LL, Duong TA, Geiser DM,Roets F, Steenkamp ET, van der Nest MA, van Heerden CJ, Wingfield MJ (2019). Draft genomes of the fungal species Fusarium xylarioides, Teratosphaeria gauchensis and T. zuluensis, and genome annotation for Ceratocystis fimbriataIMA Fungus 10: 1-10.

Aoki T, Kasson M, Berger M, Freeman S, Geiser D, O'Donnell K. 2018. Fusarium oligoseptatum sp. nov., a mycosymbiont of the ambrosia beetle Euwallacea validus in the Eastern US and typification of F. ambrosium. Fungal Systematics and Evolution 1:23-39.

Jacobs-Venter A, Laraba I, Geiser DM, Busman M, Vaughan MM, Proctor RH, McCormick SP, O'Donnell K. 2018. Molecular systematics of two sister clades, the Fusarium concolor and F. babinda species complexes, and the discovery of a novel microcycle macroconidium–producing species from South Africa. Mycologia:1-16.

O'Donnell K, McCormick SP, Busman M, Proctor RH, Ward TJ, Doehring G, Geiser DM, Alberts JF, Rheeder JP. 2018. Marasas et al. 1984 “Toxigenic Fusarium Species: Identity and Mycotoxicology" revisited. Mycologia:1-23.

Wickert KL, Metheny AM, Davis D, Geiser D, Wenzel JW, Planinsek D, Kasson MT. 2018. First report of Fusarium stem canker on Pyrularia pubera, a rare native parasitic shrub in forests of southwestern Pennsylvania. Plant disease.

Laraba, I., Botreghda, H., Abdallah, N., Bouaicha, O., Obanor, F., Moretti, A., Geiser, D. M., Kim, H.-S., McCormick, S. P., Proctor, R. H., Kelly, A. C., Ward, T. J., & O'Donnell, K. (2017). Population genetic structure and mycotoxin potential of the wheat crown rot and head blight pathogen Fusarium culmorum in Algeria. , 103, 34-41. 

McCluskey, K., K.B. Barker, H.A. Barton, K. Boundy-Mills, D.R. Brown, J.A. Coddington, K. Cook, P. Desmeth, D. Geiser, J.A. Glaeser, S. Greene, S. Kang, M.W. Lomas, U. Melcher, S.E. Miller, D.R. Nobles, Jr., K.J. Owens, J.H. Reichman, M. da Silva, J. Wertz, C. Whitworth, D. Smith. 2017. The U.S. Culture Collection Network Responding to the Requirements of the Nagoya Protocol on Access and Benefit Sharing. MBio 8. doi.org/10.1128/mBio.00982-17

Hibbett, D., K. Abarenkov, U. Koljalg, M. Opik, B. Chai, J.R. Cole, Q. Wang, P.W. Crous, V.A. Robert, T. Helgason, J. Herr, P. Kirk, S. Lueschow, K. O'Donnell, H. Nilsson, R. Oono, C.L. Schoch, C. Smyth, D. Walker, A. Porras-Alfaro, J.W. Taylor, D.M. Geiser. 2016. Sequence-based classification and identification of Fungi. Mycologia, doi:10.3852/16-130

Ren R, Sun YZ, Zhao Y, Geiser D, Ma H, Zhou X. 2016. Phylogenetic resolution of deep eukaryotic and fungal relationships using conserved low-copy nuclear genes. Genome Biol Evol 9: 2683-2701.

McCluskey K, Alvarez A, Bennett R, Bokati D, Boundy-Mills K, Brown D, Bull C, Coffey M, Dreaden T, Duke C, Dye G, Ehmke E, Eversole K, Fenstermacher K, Geiser D, Glaeser J, Green S, Gribble L, Griffith LP, Hanser K, Humber R, Johnson BW, Kermode A, Krichevsky M, Laudon M, Leach J, Leslie J, May M, Melcher U, Nobles D, Fonseca NR, Robinson S, Ryan M, Scott J, Silflow C, Vidaver A, Webb KM, Wertz JE, Yentsch S, and Zehr S. 2016. The U.S. Culture Collection Network lays the foundation for progress in preservation of valuable microbial resources. Phytopathology 106: 532-540.

O'Donnell, K, Sutton, DA, Wiederhold, N, Robert, VARG, Crous, PW, Geiser DM. 2016. Veterinary fusarioses within the United States. J. Clin. Microbiol. 54: 2813-2819.

O'Donnell, K, Libeskind-Hadas, R, Hulcr, J, Bateman, C, Kasson, MT, Ploetz, RC, Konkol, JL, Ploetz, JN, Carillo, D, Campbell, A, Duncan, RE, Liyanage, PNH, Eskalen, A, Lynch, SC, Geiser, DM, Freeman, S, Mendel, Z, Sharon, M, Aoki, T, Cosse, AA, Rooney, AP. 2016. Invasive Asian Fusarium-Euwallacea ambrosia beetle mutualists pose a serious threat to forests, urban landscapes and the avocado industry. Phytoparasitica 44: 435-442.

Herr JR, Scully ED, Geib SM, Hoover K, Carlson JE, Geiser DM. 2016 Genome sequence of Fusarium isolate MYA-4552 from the midgut of Anoplophora glabripennis, an invasive, wood-boring beetle. Genome Announcements 4: e00544-16.

Shroers H-J, Samuels GJ, Zhang N, Short DPG, Juba JH, Geiser DM. 2016. Epitypification of Fusisporium (Fusarium) solani and its assignment to a common phylogenetic species in the Fusarium solani Species Complex. Mycologia doi 10.3852/15-255.

O'Donnell K, Ward TJ, Robert VARG, Crous PW, Geiser DM, Kang S. 2015. DNA sequence-based identification of Fusarium: Current status and future directions. Phytoparasitica 43: 583-595.

O'Donnell K, Sink S, Libeskind-Hadas R, Hulcr J, Kasson MT, Ploetz RC, Konkol JL, Ploetz JN, Carrillo D, Campbell A, Duncan RE, Liyanage PNH, Eskalen A, Na F, Geiser DM, Bateman C, Freeman S, Mendel Z, Sharon M, Aoki T, Cossé AA, Rooney AP. 2015 Discordant phylogenies suggest repeated host shifts in the Fusarium-Euwallacea ambrosia beetle mutualism. Fungal Genetics and Biology 82: 277-290.

Araújo JPM, Evans HC, Geiser DM, Mackay WP, Hughes DP. 2015. Uravelling the diversity behind the Ophiocordyceps unliateralis (Ophiocordycipitaceae) complex: Three new species of zombie-ant fungi from the Brazilian Amazon. Phytotaxa 220: 224-238.

Geiser DM. 2015. Antifungal design: The toxicity-resistance yin-yang. (invited News and Views) Nature Chemical Biology 11: 453-454.

Montecchio M, Faccoli M, Short DPG, Fanchin M, Geiser DM, Kasson MT. 2015. First report of Fusarium solani phylogenetic species 25 associated with early stages of Thousand Cankers Disease on Juglans nigra  and Juglans regia in Italy.  Plant Disease 99: 1183.

Guo L, Blatt AZ, Geiser DM, Jiménez-Gasco MM, Kuldau GA. 2015. Mating type and spore killing characterization of Fusarium verticillioides strains.  Mycological Progress 14: 1-6.

De Hoog CS, Chaturvedi V, Denning DW, Dyer PS, Frisvad JC, Geiser DM, Gräser Y, Guarro J, Haase G, Kwon-Chung KJ, Meis JF, Meyer W, Pitt JI, Samson RA, Taylor JW, Tintelnot K, Vitale RG, Walsh TJ, Lackner M. 2015. Name changes in medically important fungi and the implications for clinical practice. J. Clin. Microbiol.  53: 1056-1062.

Elmore MH, McGary KL, Wisecaver JH, Slot JC, Geiser DM, Sink S, O'Donnell K, Rojas A. 2015. Clustering of two genes putatively involved in cyanate detoxification evolved recently and independently in multiple fungal lineages. Genome Biology and Evolution 7: 789-800.

Aoki T, Vaughan MM, McCormick SP, Busman M, Ward TJ, Kelly A, O'Donnell K, Geiser DM. 2015. Fusarium dactydilis sp. nov., a novel nivalenol toxin-producing species sister to F. pseudograminearum isolated from orchard grass (Dactylis glomerata) in Oregon and New Zealand. Mycologia 107: 409-418.

Geiser DM, LoBuglio KF, Gueidan C. 2015. Pezizomycotina: Eurotiomycetes. Pp 121-141 in The Mycota VII, Systematics and Evolution, Part B. Second Edition. McLaughlin DJ, Spatafora JW, Lemke PA, eds. Springer, Berlin Heidelberg.

Aoki T, O'Donnell K, Geiser DM. 2014. Systematics of key phytopathogenic Fusarium species: current status and future challenges.  J. Gen. Plant Path. 80: 189-201.

Short DPG, O'Donnell K, Geiser DM. 2014. Clonality, recombination, and hybridization in the plumbing-inhabiting human pathogen Fusarium keratoplasticum inferred from multilocus sequence typing. BMC Evolutionary Biology 14:91.

Park B, Martin F, Geiser DM, Kim HS, Mansfield MA, Nikolaeva E, Park SY, Coffey MD, Russo J, Kim SH, Balci Y, Agad G, Burgess T, Grunwald NJ, Cheong K, Choi J, Lee YH, Kang S. 2013. Phytophthora Database 2.0: Update and Future Direction.  Phytopathology 103: 1204-1208.

Ma L, Geiser DM, Proctor RH, Rooney AP, O'Donnell K, Trail F, Gardiner DM, Manners JM, Kazan K. 2013. Fusarium Pathogenomics. Annu. Rev. Microbiol. 67: 399-416.

Kasson MP, O'Donnell K, Rooney AP, Sink S, Ploetz RC, Ploetz JN, Konkol JL, Carrillo D, Freeman S, Mendel Z, Smith JA, Black AW, Hulcr J, Bateman C, Stefkova K, Campbell PR, Geering ADW, Dann EK, Esklalen A, Mohotti K, Short DPG, Aoki T, Fenstermacher KA, Davis DD, Geiser DM. 2013. An inordinate fondness for Fusarium: Phylogenetic diversity of fusaria cultivated by ambrosia beetles in the genus Euwallacea on avocado and other plant hosts. Fungal Genetics and Biology. 56: 147-157.

Short DPG, O'Donnell K, Thrane U, Fog Nielsen K, Zhang N, Juba JH, Geiser DM. 2013. Phylogenetic relationships among members of the Fusarium solani species complex in human infections, and the descriptions of F. keratoplasticum sp. nov. and F. petroliphilum stat. nov. Fungal Genetics and Biology, 53: 59-70.

Aoki T, Smith JA, Mount LL, Geiser DM, O'Donnell K. 2013. Fusarium torreyae sp. nov., a pathogen causing canker disease of Florida torreya (Torreya taxifolia), a critically endangered conifer restricted to northern Florida and southwestern Georgia. Mycologia, 105: 312-319.

Geiser DM, Aoki T, Bacon CW, Baker SE, Bhattacharayya MB, Brandt M, Burgess LW, Chulze S, Coleman JJ, Correll JC, Covert SF, Crous PW, Cuomo CA, de Hoog GS, Di Pietro A, Elmer WH, Epstein L, Frandsen RJN, Freeman S, Gagkaeva T, Glenn AE, Gordon TR, Gregory NF, Hammond-Kosack KE, Hanson LE, Jimenez Gasco MM, Kang S, Kistler HC, Kuldau GA, Leslie JF, Logrieco A, Lu G, Lysøe E, Ma L, McCormick SP, Migheli Q, Moretti A, Munaut F, O'Donnell K, Pfenning LH, Ploetz RC, Proctor RH, Rehner SA, Robert VARG, Rooney AP, Salleh B, Scandiani MM, Scauflaire J, Short DPG, Steenkamp ET, Suga H, Summerell BA, Sutton DA, Thrane U, Trail F, van Diepeningen A, VanEtten HD, Viljoen A, Waalwijk C, Ward TJ, Wingfield MJ, Xu J, Yang X, Yli-Mattila T, Zhang N. 2013. LETTER TO THE EDITOR: One Fungus, One Name: Defining the genus Fusarium in a scientifically robust way that preserves longstanding use. Phytopathology, 103: 400-408.

O'Donnell K, Rooney AP, Proctor RH, Brown DW, McCormick SP, Ward TJ, Frandsen RJN, Lysøe E, Rehner SA, Aoki T, Robert VARG, Crous PW, Groenewald JZ, Kang S, Geiser DM. 2013. Phylogenetic analyses of RPB1 and RPB2 support a middle Cretaceous origin for a clade comprising all agriculturally and medically important fusaria. Fungal Genetics and Biology, 52: 20-31.

Rossman AY, Seifert KA, Samuels GJ, Minnis AM, Schroers H-J, Lombard L, Crous PW, Põldmaa K, Cannon PF, Summerbell RC, Geiser DM, Zhuang W, Hirooka Y, Herrera C, Salgado-Salazar C, Chaverri P. 2013. Genera in Bionectriaceae, Hypocreaceae, and Nectriaceae (Hypocreales) proposed for acceptance or rejection. IMA Fungus 4: 41-51.

Publications

Diversity of Arthropods that Visit Xyris spp. (Xyridaceae): New Observations from Guyana
Proceedings of the Entomological Society of Washington, Torres-Cruz, Terry J., Ré, Lauren A., Johnson, Jack R., Geiser, David M., Skvarla, Michael J., 2024

DNA Sequence-Based Identification of Fusarium: A Work in Progress
Plant Disease, O’Donnell, Kerry, Whitaker, Briana K., Laraba, Imane, Proctor, Robert H., Brown, Daren W., Broders, Kirk, Kim, Hye Seon, McCormick, Susan P., Busman, Mark, Aoki, Takayuki, Torres-Cruz, Terry J., Geiser, David M., 2022

FUSARIUM-ID v.3.0: An Updated, Downloadable Resource for Fusarium Species Identification
Plant Disease, Torres-Cruz, T, Whitaker, B, Proctor, R, Broders, K, Laraba, I, Kim, H, Brown, D, O’Donnell, Kerry, O'Donnell, K, Estrada-Rodríguez, T, Lee, Y, Cheong, K, Wallace, E, McGee, C, Kang, S, Geiser, David, 2022

Fusarium abutilonis and F. guadeloupense, two novel species in the Fusarium buharicum clade supported by multilocus molecular phylogenetic analyses
Mycologia, O’Donnell, Kerry, Gräfenhan, Tom, Laraba, Imane, Busman, Mark, Proctor, Robert H., Kim, Hye Seon, Wiederhold, Nathan P., Geiser, David M., Seifert, Keith A., 2022

Pure Culture and DNA Sequence-Based Identification of Fusarium from Symptomatic Plants and Diverse Substrates
Methods in molecular biology: Fusarium WIlt, O'Donnell, K, O’Donnell, Kerry, Laraba, I, Geiser, David, 2022

Author Correction: Fungal taxonomy and sequence-based nomenclature (Nature Microbiology, (2021), 6, 5, (540-548), 10.1038/s41564-021-00888-x)
Nature Microbiology, Lücking, Robert, Aime, M. Catherine, Robbertse, Barbara, Miller, Andrew N., Aoki, Takayuki, Ariyawansa, Hiran A., Cardinali, Gianluigi, Crous, Pedro W., Druzhinina, Irina S., Geiser, David M., Hawksworth, David L., Hyde, Kevin D., Irinyi, Laszlo, Jeewon, Rajesh, Johnston, Peter R., Kirk, Paul M., Malosso, Elaine, May, Tom W., Meyer, Wieland, Nilsson, Henrik R., Öpik, Maarja, Robert, Vincent, Stadler, Marc, Thines, Marco, Vu, Duong, Yurkov, Andrey M., Zhang, Ning, Schoch, Conrad L., 2021

Phylogenomic analysis of a 55.1-kb 19-gene dataset resolves a monophyletic fusarium that includes the fusarium solani species complex
Phytopathology, Geiser, David M., Al-Hatmi, Abdullah M.S., Aoki, Takayuki, Arie, Tsutomu, Balmas, Virgilio, Barnes, Irene, Bergstrom, Gary C., Bhattacharyya, Madan K., Blomquist, Cheryl L., Bowden, Robert L., Brankovics, Balazs, Brown, Daren W., Burgess, Lester W., Bushley, Kathryn, Busman, Mark, Cano-Lira, Jose F., Carrillo, Joseph D., Chang, Hao Xun, Chen, Chi Yu, Chen, Wanquan, Chilvers, Martin, Chulze, Sofia, Coleman, Jeffrey J., Cuomo, Christina A., Wilhelm de Beer, Z., Sybren de Hoog, G., Castillo-Munera, Johanna Del, Del Ponte, Emerson M., Dieguez-Uribeondo, Javier, Pietro, Antonio Di, Edel-Hermann, Veronique, Elmer, Wade H., Epstein, Lynn, Eskalen, Akif, Esposto, Maria Carmela, Everts, Kathryne L., Fernandez-Pavıa, Sylvia P., da Silva, Gilvan Ferreira, Foroud, Nora A., Fourie, Gerda, Frandsen, Rasmus J.N., Freeman, Stanley, Freitag, Michael, Frenkel, Omer, Fuller, Kevin K., Gagkaeva, Tatiana, Gardiner, Donald M., Glenn, Anthony E., Gold, Scott E., Gordon, Thomas R., Gregory, Nancy F., Gryzenhout, Marieka, Guarro, Josep, Gugino, Beth K., Gutierrez, Santiago, Hammond-Kosack, Kim E., Harris, Linda J., Homa, Monika, Hong, Cheng Fang, Hornok, Laszlo, Huang, Jenn Wen, Ilkit, Macit, Jacobs, Adriaana, Jacobs, Karin, Jiang, Cong, del Mar Jimenez-Gasco, Marıa, Kang, Seogchan, Kasson, Matthew T., Kazan, Kemal, Kennell, John C., Kim, Hye Seon, Corby Kistler, H., Kuldau, Gretchen A., Kulik, Tomasz, Kurzai, Oliver, Laraba, Imane, Laurence, Matthew H., Lee, Theresa, Lee, Yin Won, Lee, Yong Hwan, Leslie, John F., Liew, Edward C.Y., Lofton, Lily W., Logrieco, Antonio F., Lopez-Berges, Manuel S., Luque, Alicia G., Lysøe, Erik, Ma, Li Jun, Marra, Robert E., Martin, Frank N., May, Sara R., McCormick, Susan P., McGee, Chyanna, Meis, Jacques F., Migheli, Quirico, Mohamed Nor, N. M.I., Monod, Michel, Moretti, Antonio, Mostert, Diane, Mule, Giuseppina, Munaut, Françoise, Munkvold, Gary P., Nicholson, Paul, Nucci, Marcio, O’Donnell, Kerry, Pasquali, Matias, Pfenning, Ludwig H., Prigitano, Anna, Proctor, Robert H., Ranque, Stephane, Rehner, Stephen A., Rep, Martijn, Rodrıguez-Alvarado, Gerardo, Rose, Lindy Joy, Roth, Mitchell G., Ruiz-Roldan, Carmen, Saleh, Amgad A., Salleh, Baharuddin, Sang, Hyunkyu, Scandiani, Marıa Mercedes, Scauflaire, Jonathan, Schmale, David G., Short, Dylan P.G., Sisic, Adnan, Smith, Jason A., Smyth, Christopher W., Son, Hokyoung, Spahr, Ellie, Stajich, Jason E., Steenkamp, Emma, Steinberg, Christian, Subramaniam, Rajagopal, Suga, Haruhisa, Summerell, Brett A., Susca, Antonella, Swett, Cassandra L., Toomajian, Christopher, Torres-Cruz, Terry J., Tortorano, Anna M., Urban, Martin, Vaillancourt, Lisa J., Vallad, Gary E., van der Lee, Theo A.J., Vanderpool, Dan, van Diepeningen, Anne D., Vaughan, Martha M., Venter, Eduard, Vermeulen, Marcele, Verweij, Paul E., Viljoen, Altus, Waalwijk, Cees, Wallace, Emma C., Walther, Grit, Wang, Jie, Ward, Todd J., Wickes, Brian L., Wiederhold, Nathan P., Wingfield, Michael J., Wood, Ana K.M., Xu, Jin Rong, Yang, Xiao Bing, Yli-Mattila, Tapani, Yun, Sung Hwan, Zakaria, Latiffah, Zhang, Hao, Zhang, Ning, Zhang, Sean X., Zhang, Xue, 2021

Fungal taxonomy and sequence-based nomenclature
Nature Microbiology, Lücking, Robert, Aime, M. Catherine, Robbertse, Barbara, Miller, Andrew N., Aoki, Takayuki, Ariyawansa, Hiran A., Cardinali, Gianluigi, Crous, Pedro W., Druzhinina, Irina S., Geiser, David M., Hawksworth, David L., Hyde, Kevin D., Irinyi, Laszlo, Jeewon, Rajesh, Johnston, Peter R., Kirk, Paul M., Malosso, Elaine, May, Tom W., Meyer, Wieland, Nilsson, Henrik R., Öpik, Maarja, Robert, Vincent, Stadler, Marc, Thines, Marco, Vu, Duong, Yurkov, Andrey M., Zhang, Ning, Schoch, Conrad L., 2021

Phylogenetic diversity, trichothecene potential, and pathogenicity within Fusarium sambucinum species complex
PLoS One, Laraba, Imane, McCormick, Susan P., Vaughan, Martha M., Geiser, David M., O’Donnell, Kerry, 2021

Three novel Ambrosia Fusarium Clade species producing multiseptate “dolphin-shaped” conidia, and an augmented description of Fusarium kuroshium
Mycologia, Aoki, Takayuki, Liyanage, Pradeepa N.H., Konkol, Joshua L., Ploetz, Randy C., Smith, Jason A., Kasson, Matt T., Freeman, Stanley, Geiser, David M., O’Donnell, Kerry, 2021

No to neocosmospora: Phylogenomic and practical reasons for continued inclusion of the fusarium solani species complex in the genus fusarium
mSphere, O'Donnell, Kerry, Al-Hatmi, Abdullah M.S., Aoki, Takayuki, Brankovics, Balázs, Cano-Lira, José F., Coleman, Jeffrey J., de Hoog, G. Sybren, Di Pietro, Antonio, Frandsen, Rasmus J.N., Geiser, David M., Gibas, Connie F.C., Guarro, Josep, Kim, Hye Seon, Kistler, H. Corby, Laraba, Imane, Leslie, John F., López-Berges, Manuel S., Lysøe, Erik, Meis, Jacques F., Monod, Michel, Proctor, Robert H., Rep, Martijn, Ruiz-Roldán, Carmen, Šišić, Adnan, Stajich, Jason E., Steenkamp, Emma T., Summerell, Brett A., van der Lee, Theo A.J., van Diepeningen, Anne D., Verweij, Paul E., Waalwijk, Cees, Ward, Todd J., Wickes, Brian L., Wiederhold, Nathan P., Wingfield, Michael J., Zhang, Ning, Zhang, Sean X., 2020

Unambiguous identification of fungi: Where do we stand and how accurate and precise is fungal DNA barcoding?
IMA Fungus, Lücking, Robert, Aime, M. Catherine, Robbertse, Barbara, Miller, Andrew N., Ariyawansa, Hiran A., Aoki, Takayuki, Cardinali, Gianluigi, Crous, Pedro W., Druzhinina, Irina S., Geiser, David M., Hawksworth, David L., Hyde, Kevin D., Irinyi, Laszlo, Jeewon, Rajesh, Johnston, Peter R., Kirk, Paul M., Malosso, Elaine, May, Tom W., Meyer, Wieland, Öpik, Maarja, Robert, Vincent, Stadler, Marc, Thines, Marco, Vu, Duong, Yurkov, Andrey M., Zhang, Ning, Schoch, Conrad L., 2020

Evolutionary relationships among Massospora spp. (Entomophthorales), obligate pathogens of cicadas
Mycologia, Macias, Angie M., Geiser, David M., Stajich, Jason E., Łukasik, Piotr, Veloso, Claudio, Bublitz, De Anna C., Berger, Matthew C., Boyce, Greg R., Hodge, Kathie, Kasson, Matt T., 2020

Three novel Ambrosia Fusarium Clade species producing clavate macroconidia known (F. floridanum and F. obliquiseptatum) or predicted (F. tuaranense) to be farmed by Euwallacea spp. (Coleoptera: Scolytinae) on woody hosts
Mycologia, Aoki, Takayuki, Smith, Jason A., Kasson, Matthew T., Freeman, Stanley, Geiser, David M., Geering, Andrew D.W., O’Donnell, Kerry, 2019

Unraveling the ecology and epidemiology of an emerging fungal disease, sea turtle egg fusariosis (STEF)
PLoS Pathogens, Smyth, Christopher W., Sarmiento-Ramírez, Jullie M., Short, Dylan P.G., Diéguez-Uribeondoid, Javier, O’donnell, Kerry, Geiser, David M., 2019

Comparative analysis uncovers the limitations of current molecular detection methods for Fusarium oxysporum f. Sp. Cubense Race 4 strains
PLoS One, Magdama, Freddy, Monserrate-Maggi, Lorena, Serrano, Lizette, Sosa, Daynet, Geiser, David M., Jiménez-Gasco, María del Mar, 2019

Draft genome sequences of Fusarium xylarioides, Teratosphaeria gauchensis and T. zuluensis and genome annotation for Ceratocystis fimbriata.
IMA Fungus, Wingfield, Brenda, Fourie, Arista, Simpson, Melissa, Bushula-Njah, Vuyiswa, Aylward, Janneke, Barnes, Irene, Coetzee, Martin, Dreyer, L\'eanne L, None, Duong, Tuan, Geiser, David, others, None, 2019

Marasas et al. 1984 “Toxigenic Fusarium Species: Identity and Mycotoxicology” revisited
Mycologia, O’Donnell, Kerry, McCormick, Susan P., Busman, Mark, Proctor, Robert H., Ward, Todd J., Doehring, Gail, Geiser, David M., Alberts, Johanna F., Rheeder, John P., 2018

Molecular systematics of two sister clades, the Fusarium concolor and F. babinda species complexes, and the discovery of a novel microcycle macroconidium–producing species from South Africa
Mycologia, Jacobs-Venter, Adriaana, Laraba, Imane, Geiser, David M., Busman, Mark, Vaughan, Martha M., Proctor, Robert H., McCormick, Susan P., O’Donnell, Kerry, 2018

First report of fusarium stem canker on pyrularia pubera, a rare native parasitic shrub in forests of southwestern Pennsylvania
Plant Disease, Wickert, K. L., Metheny, A. M., Davis, Donald D., Geiser, D. M., Wenzel, J. W., Planinsek, D., Kasson, Matthew T., 2018

Fusarium oligoseptatum sp. nov., a mycosymbiont of the ambrosia beetle Euwallacea validus in the Eastern U.S. And typification of F. ambrosium
Fungal Systematics and Evolution, Aoki, T., Kasson, M. T., Berger, M. C., Freeman, S., Geiser, D. M., O'Donnell, K., 2018

The U.S. culture collection network responding to the requirements of the Nagoya protocol on access and benefit sharing
mBio, McCluskey, Kevin, Barker, Katharine B., Barton, Hazel A., Boundy-Mills, Kyria, Brown, Daniel R., Coddington, Jonathan A., Cook, Kevin, Desmeth, Philippe, Geiser, David, Glaeser, Jessie A., Greene, Stephanie, Kang, Seogchan, Lomas, Michael W., Melcher, Ulrich, Miller, Scott E., Nobles, David R., Owens, Kristina J., Reichman, Jerome H., Silva, Manuela Da, Wertz, John, Whitworth, Cale, Smith, David, 2017

Population genetic structure and mycotoxin potential of the wheat crown rot and head blight pathogen Fusarium culmorum in Algeria
Fungal Genetics and Biology, Laraba, Imane, Boureghda, Houda, Abdallah, Nora, Bouaicha, Oussama, Obanor, Friday, Moretti, Antonio, Geiser, David M., Kim, Hye Seon, McCormick, Susan P., Proctor, Robert H., Kelly, Amy C., Ward, Todd J., O'Donnell, Kerry, 2017

Sequence-based classification and identification of Fungi
Mycologia, Hibbett, David, Abarenkov, Kessy, Kõljalg, Urmas, Öpik, Maarja, Chai, Benli, Cole, James, Wang, Qiong, Crous, Pedro, Robert, Vincent, Helgason, Thorunn, Herr, Joshua R., Kirk, Paul, Lueschow, Shiloh, O’Donnell, Kerry, Nilsson, R. Henrik, Oono, Ryoko, Schoch, Conrad, Smyth, Christopher, Walker, Donald M., Porras-Alfaro, Andrea, Taylor, John W., Geiser, David M., 2016

Veterinary fusarioses within the United States
Journal of Clinical Microbiology, O'Donnell, Kerry, Sutton, Deanna A., Wiederhold, Nathan, Robert, Vincent A.R.G., Crous, Pedro W., Geiser, David M., 2016

Invasive Asian Fusarium – Euwallacea ambrosia beetle mutualists pose a serious threat to forests, urban landscapes and the avocado industry
Phytoparasitica, O’Donnell, Kerry, Libeskind-Hadas, Ran, Hulcr, Jiri, Bateman, Craig, Kasson, Matthew T., Ploetz, Randy C., Konkol, Joshua L., Ploetz, Jill N., Carrillo, Daniel, Campbell, Alina, Duncan, Rita E., Liyanage, Pradeepa N.H., Eskalen, Akif, Lynch, Shannon C., Geiser, David M., Freeman, Stanley, Mendel, Zvi, Sharon, Michal, Aoki, Takayuki, Cossé, Allard A., Rooney, Alejandro P., 2016

The U.S. Culture Collection Network lays the foundation for progress in preservation of valuable microbial resources
Phytopathology, McCluskey, Kevin, Alvarez, Anne, Bennett, Rick, Bokati, Deepak, Boundy-Mills, Kyria, Brown, Daniel, Bull, Carolee T., Coffey, Michael, Dreaden, Tyler, Duke, Clifford, Dye, Greg, Ehmke, Erin, Eversole, Kellye, Fenstermacher, Kristi, Geiser, David, Glaeser, Jessie A., Greene, Stephanie, Gribble, Lisa, Griffith, M. Patrick, Hanser, Kathryn, Humber, Richard, Johnson, Barbara W., Kermode, Anthony, Krichevsky, Micah, Laudon, Matt, Leach, Jan, Leslie, John, May, Meghan, Melcher, Ulrich, Nobles, David, Fonseca, Natalia Risso, Robinson, Sara, Ryan, Matthew, Scott, James, Silflow, Carolyn, Vidaver, Anne, Webb, Kimberly M., Wertz, John E., Yentsch, Sara, Zehr, Sarah, 2016

Phylogenetic resolution of deep eukaryotic and fungal relationships using highly conserved low-copy nuclear genes
Genome Biology and Evolution, Ren, Ren, Sun, Yazhou, Zhao, Yue, Geiser, David, Ma, Hong, Zhou, Xiaofan, 2016

Genome sequence of fusarium isolate MYA-4552 from the midgut of Anoplophora glabripennis, an invasive, wood-boring beetle
Genome Announcements, Herr, Joshua R., Scully, Erin D., Geib, Scott M., Hoover, Kelli, Carlson, John E., Geiser, David M., 2016

Epitypification of Fusisporium (Fusarium) solani and its assignment to a common phylogenetic species in the Fusarium solani species complex
Mycologia, Schroers, Hans Josef, Samuels, Gary J., Zhang, Ning, Short, Dylan P.G., Juba, Jean, Geiser, David M., 2016

DNA sequence-based identification of Fusarium: Current status and future directions
Phytoparasitica, O’Donnell, Kerry, Ward, Todd J., Robert, Vincent A.R.G., Crous, Pedro W., Geiser, David M., Kang, Seogchan, 2015

Discordant phylogenies suggest repeated host shifts in the Fusarium-Euwallacea ambrosia beetle mutualism
Fungal Genetics and Biology, O'Donnell, Kerry, Sink, Stacy, Libeskind-Hadas, Ran, Hulcr, Jiri, Kasson, Matthew T., Ploetz, Randy C., Konkol, Joshua L., Ploetz, Jill N., Carrillo, Daniel, Campbell, Alina, Duncan, Rita E., Liyanage, Pradeepa N.H., Eskalen, Akif, Na, Francis, Geiser, David M., Bateman, Craig, Freeman, Stanley, Mendel, Zvi, Sharon, Michal, Aoki, Takayuki, Cossé, Allard A., Rooney, Alejandro P., 2015

Unravelling the diversity behind the Ophiocordyceps unilateralis (Ophiocordycipitaceae) complex: Three new species of zombie-ant fungi from the Brazilian Amazon
Phytotaxa, Araújo, João P.M., Evans, Harry C., Geiser, David M., Mackay, William P., Hughes, David P., 2015

Antifungal design: The toxicity-resistance yin-yang
Nature Chemical Biology, Geiser, David M., 2015

Name changes in medically important fungi and their implications for clinical practice
Journal of Clinical Microbiology, De Hoog, G. Sybren, Chaturvedi, Vishnu, Denning, David W., Dyer, Paul S., Frisvad, Jens Christian, Geiser, David, Gräser, Yvonne, Guarro, Josep, Haase, Gerhard, Kwon-Chung, Kyung Joo, Meis, Jacques F., Meyer, Wieland, Pitt, John I., Samson, Robert A., Taylor, John W., Tintelnot, Kathrin, Vitale, Roxana G., Walsh, Thomas J., Lackner, Michaela, Boekhout, Teun, Chakrabarti, Arunaloke, Chowdhary, Anuradha, Cole, Garry, Cornely, Olivier A., Crous, Pedro W., D'Enfert, Christophe, Garcia-Hermoso, Dea, Ellis, D. David, Lass-Flörl, Cornelia, Levitz, Stuart, Li, Ruo Yu, Mitchell, Aaron P., O'Donnell, Kerry, Perfect, John R., Telles, Flavio Queiroz, Sutton, Deanna A., Voigt, Kerstin, White, Theodore C., Xi, Liyan, 2015

Clustering of two genes putatively involved in cyanate detoxification evolved recently and independently in multiple fungal lineages
Genome Biology and Evolution, Elmore, M. Holly, McGary, Kriston L., Wisecaver, Jennifer H., Slot, Jason C., Geiser, David M., Sink, Stacy, O'Donnell, Kerry, Rokas, Antonis, 2015

First report of fusarium solani phylogenetic species 25 associated with early stages of thousand cankers disease on juglans nigra and Juglans regia in Italy
Plant Disease, Montecchio, L., Faccoli, M., Short, D. P.G., Fanchin, G., Geiser, D. M., Kasson, M. T., 2015

Mating type and spore killing characterization of Fusarium verticillioides strains
Mycological Progress, Guo, Li, Blatt, Adam Z., Geiser, David M., Jiménez-Gasco, Maria del Mar, Kuldau, Gretchen A., 2015

Fusarium dactylidis sp. nov., a novel nivalenol toxin-producing species sister to F. pseudograminearum isolated from orchard grass (Dactylis glomerata) in Oregon and New Zealand
Mycologia, Aoki, Takayuki, Vaughan, Martha M., McCormick, Susan P., Busman, Mark, Ward, Todd J., Kelly, Amy, O'Donnell, Kerry, Johnston, Peter R., Geiser, David Michael, 2015

USDA ARS National Center for Genetic Resources Preservation Provides Key Backup Service for Active Culture Collections
Phytopathology News, Geiser, David, 2015

Pezizomycotina: Eurotiomycetes, Geiser, David M., Lobuglio, Katherine F., Gueidan, CéCile, 2015

Pezizomycotina: Eurotiomycetes, Geiser, David, LoBuglio, K, Gueidan, C, 2015

Systematics of key phytopathogenic Fusarium species: Current status and future challenges
Journal of General Plant Pathology, Aoki, Takayuki, O'Donnell, Kerry, Geiser, David M., 2014