Research Papers


Popko, J.T., Ok, C.-H., Campbell-Nelson, K., and Jung, G. 2011. The Association Between In Vitro Sensitivity and Field Efficacy of Five New England Sclerotinia homoeocarpa Populations. Plant Disease First Look.

Amundsen, K., Rotter, D., Li, H.M., Messing, J., Jung, G., Belanger, F., Warnke, S. 2011. Miniature Inverted-Repeat Transposable Element Identification and Genetic Marker Development in Agrostis. Crop Science 51:854-861.

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.


Putman, A. I., Jung, G., Kaminski, J. E. 2010. Geographic Distributuoin of Fungicide-Insensitive Scelrotinia homoeocarpa Isolates from Golf Courses in the Northeastern United States. Plant Disease 94:186-195.

Brown, R. N., Barker, R. E., Warnke, S. E., Cooper, L. D., Brilman, L. A., Rouf Mian, M. A., Jung, G. and Sim, S. -C. 2010. Identification and Quatitative Trait Loci for Seed Traits and Floral Morphology in a field-grown Lolium perenne X Lolium multiflorum mapping population. Plant Breeding 129:29-34.


Jo, Y.-K., Kim, B. H., and Jung, G. 2009. Antifungal Activity of Silver Ions and Nanoparticles on Phytopathogenic Fungi. Plant Disease 93:1037-1043.

Chang, S. W. and G. Jung. 2009. Aggressiveness of three snow mold fungi on creeping bentgrass cultivars under controlled environment conditions. The Plant Pathology Journal 25(1): 6-12.

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.

Koch, P. L., Grau, C. R., Jo, Y.-K. and Jung, G.. 2009. Thiophanate-Methyl and Propiconazole Sensitivity in Sclerotinia homoeocarpa Populations from Golf Courses in Wisconsin and Massachusetts. Plant Disease 93:100-105.


Jo, Y.-K., Chang, S. W., Boehm, M. and Jung, G.. 2008. Rapid Development of Fungicide Resistance by Sclerotinia homoeocarpa on Turfgrass. Phytopathology 98:1297-1304.

Curley, J., N. Chakraborty, S. Chang, and G. Jung. 2008. QTL mapping of resistance to gray leaf spot in ryegrass: consistency of QTL between two mapping populations. Journal of Korean Turfgrass Sci. 22(1):85-100.

Chang, S.W., and G. Jung. 2008. The first linkage map of the psychrophilic Basidiomycete Typhula ishikariensis. Genome 51:128-136.

Jo, Y., R. Barker, W. Pfender, S. Warnke, S. Sim, and G. Jung. 2008. Comparative analysis of multiple disease resistance in ryegrass and cereal crops. Theoretical and Applied Genetics 117:531-543.

Jo, Y., S. Chang, J. Rees, and G. Jung. 2008. Reassessment of vegetative compatibility of Sclerotinia homoeocarpa using nitrate-nonutilizing mutants. Phytopathology 98:108-114.


Rotter, D., Bharti, A.D., Li, H.D., Luo, C., Bonos, S.A., Bughrara, S., Jung, G., Messing, J., Meyer, W.A., Rudd, S., Warnke, S.E., and Belanger, F.C.. 2007. Analysis of EST sequences suggests recent origin of allotetraploid colonial and creeping bentgrasses. Mol Genet Genomics Vol. 278 No. 2:197-209.

Navarro, F., P. Skroch, G. Jung, and J. Nienhuis. 2007. Quantitative trait loci associated with bacterial brown spot in Phaseolus vulgaris L. Crop Science 47:1344-1353.

Y. Xiong, S. Fei, R. Arora, E.C. Brummer, R.E. Barker, G. Jung, and S.E. Warnke. 2007 (online Dec. 2006). Identification of quantitative trait loci controlling winter hardiness in an annual x perennial ryegrass interspecific hybrid population. Molecular Breeding 19:125-136.

Sim, S., K. Diesburg, M. Casler, and G. Jung. 2007. Mapping and comparative analysis of QTL for crown rust resistance in an Italian x perennial ryegrass population. Phytopathology 97:767-776.

Chang, S.W., T. H. Chang, R. A. B. Abler, and G. Jung. 2007. Variation in bentgrass susceptibility to Typhula incarnata and in isolate aggressiveness under controlled environment conditions. Plant Disease 91:446-452.


Chang, S.W., E. Scheef, R. A. B. Abler, S. Thomson, P. Johnson, and G. Jung. 2006. Distribution of Typhula spp. and T. ishikariensis varieties in Wisconsin, Utah, Michigan and Minnesota. Phytopathology 96:926-933.

Chakraborty, N., J. Curley, S. Warnke, M.N. Casler, and G. Jung, 2006. Mapping QTL for dollar spot resistance in creeping bentgrass (Agrostis stolonifera L.). Theoretical and Applied Genetics 113:1421-1435.

Y. Xiong, S. Fei, E. Charles Brummer, K. J. Moore, R. E. Barker, G. Jung, J. Curley, and S. E. Warnke. 2006. QTL analyses of fiber components and crude protein in an annual x perennial ryegrass interspecific hybrid population. Molecular Breeding 18:327-340.

Chang, S.W., T.H. Chang, L. Tredway, and G. Jung. 2006. Aggressiveness of Typhula ishikariensis isolates to cultivars of bentgrass species (Agrostis spp.) under controlled environment conditions. Plant Disease Vol. 90 No. 7:951-956.

Iñiguez-Luy, F., M. E. Sass, G. Jung, M. A. Johns, and J. Nienhuis. 2006. Development of robust SCAR markers that distinguish the six cultivated Brassica species and subspecies of the U-triangle. Journal of American Society for Horticultural Science 131: 424-432.

Chakraborty, N., T. Chang, M.D. Casler, G. Jung. 2006. Response of bentgrass cultivars to Sclerotinia homoeocarpa isolates representing ten vegetative compatibility groups. Crop Science 46: 1237-1244.


Sim, S., T. Chang, J. Curley, S.E. Warnke, R.E. Barker and G. Jung. 2005. Chromosomal rearrangements differentiating ryegrass genome from the Triticeae, oat, and rice genomes using common heterologous RFLP probes. Theoretical and Applied Genetics 110: 1011-1019.

Brown, R.N., R.E. Barker, S.E. Warnke, L. A. Brilman, M.A. Rouf Mian, G. Jung, and S. Sim. 2005. QTL analyses for morphological traits useful in distinguishing annual ryegrass and turf-type perennial ryegrass. International Turfgrass Society Research Journal 10: 516-524.

Stier, J. J. Bae, and G. Jung. 2005. Composition of Kentucky bluegrass and perennial ryegrass turf mixtures as sports turf. International Turfgrass Society Research Journal 10: 645-653.

Hollman, A.B., J.C. Stier, M.D. Casler, G. Jung, and L. Brilman. 2005. Identification of putative velvet bentgrass clones using RAPD markers. Crop Science 45: 923-930.

Chakraborty, N., J. Bae, S. Warnke, T. Chang, G. Jung, 2005. Linkage map construction in allotetraploid creeping bentgrass (Agrostis stolonifera L.). Theoretical and Applied Genetics 111: 795-803.

Curley, J., S.C. Sim, S. Warnke, S. Leong, R. Barker, and G. Jung. 2005. QTL mapping of resistance to gray leaf spot in ryegrass. Theoretical and Applied Genetics 111: 1107-1117.

Stendal, C., M.D. Casler, G. Jung. 2005. Marker-assisted selection for neutral detergent fiber in smooth bromegrass. Crop Science 46:303-311.


Vergara, G., S.S. Bughrara, and G. Jung. 2004. Genetic variability of gray snow mold (Typhula incarnata). Mycological Research 108: 1283-1290.

Curley, J. and G. Jung. 2004. RAPD-based genetic relationships in Kentucky bluegrass: comparison of cultivars, interspecific hybrids, and plant introductions. Crop Science 44: 1299-1306.

Warnke, S.E., R.E. Barker, G. Jung, S. Sim, M.A. Rouf Mian, M.C. Saha, L.A. Brilman, M.P. Dupal, and J.W. Forster. 2004. Genetic linkage mapping of an annual x perennial ryegrass population. Theoretical and Applied Genetics 109: 294-304.

Eaton T.D., J. Curley, R.C. Williamson, and G. Jung. 2004. Determination of ploidy level of Kentucky bluegrass cultivars by means of flow cytometry. Crop Science 44: 1168-1174.


Scheef, E., M. Casler, and G. Jung. 2003. Development of species-specific SCAR markers in bentgrass. Crop Science 43: 345-349.

Casler, M. Y. Rangel, J. Stier, and G. Jung. 2003. RAPD marker diversity among creeping bentgrass clones. Crop Science 43: 688-693.

Jung, G., H.M. Ariyarathne, D.P. Coyne, and J. Nienhuis. 2003. Mapping QTL for bacterial brown spot resistance under natural infection in field and seedling stem inoculation in growth chamber in common bean. Crop Science 43: 350-357.

Burpee, L.L., C.W. Mims, L.L. Tredway, J. Bae, and G. Jung. 2003. Pathogenicity of a novel biotype of Limonomycesroseipellis in Tall Fescue. Plant Disease Vol. 87 No. 9: 1031-1036.

Sandra Vega, A. del Rio, G. Jung, J. Bamberg, and J. Palta. 2003. Marker-assisted genetic analysis of non-acclimated freezing tolerance and cold acclimation capacity in a backcross Solanum population. American Journal of Potato Research 80: 359-369.


Hoch, W., G. Jung, and B. McCown. 2002. Effectiveness of interspecific hybridization for incorporating birch leafminer (Fenusa pusilla) resistance into white-barked Betular. Journal of American Society for Horticultural Science 127(6): 957-962.

Beltran, G., G. Jung, and J. Nienhuis, and M. Bassett. 2002. Identification of RAPD markers linked to five marker genes (blu, dgs, y, arg, and a flat pod mutant) in common bean. Journal of American Society for Horticultural Science 127(4): 685-688.


A.L. Fall, P.F. Byrne, G. Jung, D.P. Coyne, M.A. Brick, and H.F. Schwartz. 2001. Detection and mapping of a major locus for Fusarium wilt resistance in common bean. Crop Science 41: 1494-1498.


S. Park, D. Coyne, G. Jung, P. Skroch, E. Arnaud-Santana, J. Steadman, H. Ariyarathne, and J. Nienhuis. 2000. Mapping of QTL for seed size and shape traits in common bean. Journal of American Society for Horticultural Science 125: 466-475.


G. Jung, P. Skroch, J. Nienhuis, D. Coyne, H.M. Ariyarathne , and E. Arnaud-Santana. 1999. Confirmation of QTL associated with common bacterial blight resistance in four different genetic backgrounds in common bean. Crop Science 39: 1448-1455.

Ariyarathne H.M., D.P. Coyne, G. Jung, A.K. Vidaver, J.R. Steadman, P.N. Miklas, M.J. Bassett, and P. Skroch. 1999. Molecular mapping of disease resistance genes for halo blight, common bacterial blight, and bean common mosaic virus in a segregating population of common bean. Journal of American Society for Horticultural Science 124 (6): 654-662.

C.L. Boehm, H.C. Harrison, G. Jung, J. Nienhuis. 1999. Organization of American and Asian Ginseng (Panax sp.) Germplasm Using Randomly Amplified Polymorphic DNA (RAPD). Journal of American Society for Horticultural Science 124 (3): 252-256.

S. Park, D. Coyne, N. Mutlu, and G. Jung. 1999. Confirmation of molecular markers and flower color associated with QTL for resistance to common bacterial blight in common beans. Journal of American Society for Horticultural Science 124 (5): 519-526.


Soon O. Park, Dermot P. Coyne, Atilla Dursun, and Geunhwa Jung. 1998. Identifying randomly amplified polymorphic DNA (RAPD) markers linked to major genes for common bacterial blight resistance in tepary bean. Journal of American Society for Horticultural Science 123 (2): 278-282.

Geunhwa Jung, Dermot P. Coyne, James Bokosi, James R. Steadman, and James Nienhuis. 1998. Mapping genes for specific and adult plant resistance to rust and abaxial leaf pubescence and their genetic relationships using molecular markers in common bean. Journal of American Society for Horticultural Science 123 (5): 859-863.


L.E.A. Camargo, L. Savides, G. Jung, J. Nienhuis, and T.C. Osborn. 1997. Location of the self-incompatibility locus in an RFLP and RAPD map of Brassica oleracea. Journal of Heredity 88: 57-60.

Geunhwa Jung, Paul W. Skroch, Dermot P. Coyne, James Nienhuis, E. Arnaud-Santana, H.M. Ariyarathne, Shawn M. Kaeppler, and Mark J. Bassett. 1997. Molecular-marker-based genetic analysis of tepary bean-derived common bacterial blight resistance in different developmental stages of common bean. Journal of American Society for Horticultural Science 122 (3): 329-337.


G. Jung, D.P. Coyne, P.W. Skroch, J. Nienhuis, E. Arnaud-Santana, J. Bokosi, H.M. Ariyarathne, J.R. Steadman, J.S. Beaver, and S.M. Kaeppler. 1996. Molecular markers associated with plant architecture and resistance to common blight, web blight and rust in common beans (Phaseolus vulgaris L.). Journal of American Society for Horticultural Science 121 (5): 794-803.


Trade Journal Articles

Jung, G. and Y. Jo. 2008. New challenge to an old foe, dollar spot fungicide resistance. GCSAA Golf Course Management February 2008 pages 170-175.

Jung, G. and S. Chang. 2008. Distribution of Typhula species and varieties in Wisconsin, Utah, Michigan and Minnesota. GCSAA Golf Course Management January 2008 pages 170-175.

Chang, S., Y. Jo, and G. Jung. 2007. A fresh look at fungicides for snow mold control. GCSAA Golf Course Management July 2007 pages 91-94.

Jung, G., J. Curley, and Y.-K. Jo. 2007. A genetic roadmap for breeding perennial ryegrass resistant to gray leaf spot. USGA Turfgrass and Environmental Research Online. 6(2):1-7.

Casler, M.D., Jung, G., Bughrara, S., Hamblin, A., Williamson, C., Voigt, T. 2006. Development of Creeping Bentgrass with Resistance to Snow Mold and Dollar Spot. USGA Turfgrass and Environmental Research Online. 5(18):1-10.


Extension Publications

Campbell-Nelson, K., Popko, J., Ok, C., Jung, G. 2010 Managing dollar spot with resistance to DMI fungicides

Jung, G., Ebdon, S. 2009 Characteristics of Kentucky Blue Grass Cultivars

Fungicides Registered for use on Turfgrasses

Turfgrass Diseases and their Approved Fungicides

Fungicide Trial Reports

Snow Mold Dollar Spot Brown Patch
2010 (fungicide resistant)

Disease Updates

Dollar Spot, Brown Patch and Dollar Spot Resistance Assays - July 8, 2011
Preventative Summer Patch Applications - May 26, 2011
Effect of Rain on Fungicide Efficacy - May 17, 2011
Fairy Ring and Take All - May 2, 2011
Yellow Patch - April 13, 2011
Snow Mold - March 21, 2011