Curriculum Vitae

Associate Professor of Turfgrass Pathology and Plant Breeding & Genetics


1995  Ph.D., Plant Breeding and Genetics, University of Nebraska-Lincoln
1992  M.S., Plant Breeding and Genetics, University of Nebraska-Lincoln
1988  B.S., Horticulture, Chungnam National University

Research Interests

  • Molecular mechanisms of fungicide resistance in Sclerotinia homoeocarpa
  • Structure and dynamics of soil microbes on organic and conventional managed golf courses
  • Management of fungicide resistance in dollar spot on turfgrass
  • Mapping of quantitative disease resistance traits in turfgrass and comparative genomics analysis in Poaceae species
  • Classical and molecular breeding of disease resistance in turfgrass

Extension and Outreach Focus

  • Educational talks on turfgrass disease management and fungicide resistance
  • Product testing for turfgrass diseases
  • Diagnostic site visits
  • In vitro and molecular diagnostic assays for fungicide resistance (dollar spot, anthracnose)
  • DNA fingerprinting of Kentucky bluegrass and bermudagrass
  • Publication of extension articles

Selected Refereed Journal Publications (Last 5 Years)

Hyunkyu Sang, Jon Hulvey, James T. Popko Jr., John Lopes, Aishwarya Swaminathan, Taehyun Chang, and Geunhwa Jung. 2014. A pleiotropic drug resistance transporter is involved in reduced sensitivity to 1 multiple fungicide classes in Sclerotinia homoeocarpa (F.T. Bennett). Molecular Plant Pathology: DOI: 10.1111/mpp.12174.

E. Allan, J. Hulvey, J. Popko, N. Mitkowski, J. Vargas, and G. Jung. 2014. Fungicide resistance in turfgrass pathogens.  Fungicide Resistance In North America. American Phytopathological Society (accepted).

Nanda Chakraborty, Sung-Chur Sim, Mike Casler, and Geunhwa Jung.. 2014. Development of SCAR marker for the detection of QTL for resistance to dollar spot in creeping bentgrass (Agrostis stolonifera L.). Horticulture, Environment and Biotechnology 55:329-334.

Seog Won Chang, Young-Ki Jo, Taehyun Chang, and Geunhwa Jung. 2014. Evidence for genetic similarity of vegetative compatibility groupings in Sclerotinia homoeocarpa. Plant Pathology Journal 30:384-396.

Loreto Araneda, Sung-Chur Sim, Jin-Joo Bae, Nanda Chakraborty, Joe Curley, Taehyun Chang, Maiko Inoue, Scott Warnke, and Geunhwa Jung. 2013. Comparative genome analysis between Agrostis stolonifera and members of the Pooideae subfamily, including Brachypodium distachyon. PLoS ONE 8(11): e79425. doi:10.1371/journal.pone.0079425.

James T. Popko, Jr., Chang-Ho Ok, Katie Campbell-Nelson, Jon Hulvey, and Geunhwa Jung. 2013. Qualitative in vitro detection of propiconazole field resistant Sclerotinia homoeocarpa isolates. International Turfgrass Society Research Journal 12:103-109.

Loreto Araneda, Jeonghwa Lee, Zhenbang Chen, Paul Raymer, and Geunhwa Jung. 2013. SSR/CISP marker analysis for genetic relationships of Zoysia cultivars and experimental genotypes. International Turfgrass Society Research Journal 12:299-304.

Hulvey, J., Popko, J., Sang, H., and G. Jung. 2012. Overexpression of ShCYP51B and ShatrD in Sclerotinia homoeocarpa field isolates exhibiting practical field resistance to propiconazole. Applied and Environmental Microbiology 78:6674-6682.

Amundsen, K, R. Brown, G. Jung, and S. Warnke. 2012. Evaluation of population structure within diploid Agrostis germplasm based on miniature inverted-repeat transposable elements.  Crop Science 52:1902-1909.

Popko, J.T., Ok, C.-H., Campbell-Nelson, K., and Jung, G. 2012. The association between in vitro sensitivity and field efficacy of five New England Sclerotinia homoeocarpa populations. Plant Disease 96:552-561.

Chang, T., S. Chang, and G. Jung. 2011. Response of bentgrass cultivars to Microdochium nivale isolates collected from golf courses. Plant Pathol. J. 27:232-241.

Ok, C.-H., Popko, J. T., Jr., Campbell-Nelson, K., and Jung, G. 2011. In vitro assessment of Sclerotinia homoeocarpa resistance to fungicides and plant growth regulators. Plant Dis. 95:51-56.

Amundsen, K., Rotter, D., Li, H.M., Messing, J., Jung, G., Belanger, F., and Warnke, S. 2011. Miniature inverted-repeat transposable element identification and genetic marker development in Agrostis. Crop Science 51:854-861.

Alexander I. Putman, Geunhwa Jung, and John E. Kaminski. 2010. Geographic distribution of fungicide-insensitive Sclerotinia homoeocarpa isolates from golf courses in the Northeastern United States. Plant Disease 94:186-195.

Popko, J., C. Ok, and G. Jung. 2010. Evaluation of fungicides for dollar spot control on creeping bentgrass and annual bluegrass putting green. Kor. Turfgrass Sci. 24(2):00~00.

Brown, R.N., Reed E. Barker, Scott E. Warnke, and Laurel D. Cooper, Leah A. Brilman, M. A. Rouf Mian, Geunhwa Jung and Sung-Chur Sim. 2010. Identification of quantitative trait loci for seed traits and floral morphology in a field-grown Lolium perenne x Lolium multiflorum mapping population. Plant Breeding 129:29-34.

G. Jung, Y. Jo, S. S. Sim, R. Barker, W. Pfender, and S. Warnke. 2009. Comparative analysis of disease resistance between ryegrass and cereal crops. Molecular Breeding of Forage and Turf, pages 229-239.  Springer Science + Business Media, LLC.

Jo, Young-Ki Jo, Byung H. Kim and Geunhwa Jung. 2009. Antifungal activity of ionic and nanoparticle silver on phytopathogenic fungi. Plant Disease 93:1037-1043.

Sim, S., J. Yu, Y. Jo, M. E. Sorrells, and G. Jung. 2009. Transferability of cereal EST-SSR markers to ryegrass. Genome 52: 431-437.

Chang, S.W. and G. Jung. 2009. Aggressiveness of three snow mold fungi on creeping bentgrass cultivars under controlled environment conditions. Plant Pathol. J. 25:6-12.

Current Courses

  • Horticultural Plant Pathology (STOCKSCH 111, 2 credits)
  • Turfgrass Pathology Lab (STOCKSCH 112, 2 credits)
  • Special Topic-Turfgrass Pathology (STOCKSCH 597M, 2 credits)
  • Special Topic-Research Proposal and Presentation (STOCKSCH 691A, 1 credit