James W. Buck Professor - Diseases of soybean, wheat and ornamentals Plant Pathology
Portrait of James W. Buck

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Portrait of James W. Buck

Academic Background

Ph.D. Plant Pathology, Univ. Wisconsin-Madison, 1998
M.S. Plant Sciences, Univ. Western Ontario, 1992
B.S. Botany, Brandon Univ., 1990

Research Interests and Current Efforts

My research is focused on the biology and management of diseases of soybean, wheat and ornamental plants. Specific pathosystems include rust, stem canker and frogeye leaf spot of soybean; leaf rust, stripe rust and fusarium head blight of of wheat; and rusts affecting ornamental plants. I work closely with UGA plant breeders Drs. Zenglu Li and Mohammed Mergoum to produce high yielding, disease resistant soybean and wheat varieties, respectively.

Recent Publications

Ghimire, B., Mergoum, M., Martinez-Espinoza, A.D., Sapkota, S., Pradhan, S., Babar, Md.A., Bai, G., Dong, Y., and Buck, J.W. 2022. Genetics of Fusarium Head Blight Resistance in Soft Red Winter Wheat Using a Genome-Wide Association Study. The Plant Genome doi.org/10.1002/tpg2.20222

McDonald, S., Buck. J.W., and Li, Z. 2022. Automated, image-based disease measurement for phenotyping resistance to soybean frogeye leaf spot. Plant Methods. accepted

Mergoum, M., Johnson, J.J., Buck, J.W., et al. 2022. A new soft red winter wheat cultivar ‘GA 08535-15LE29’ adapted to Georgia and the USA Southeast region. J. Plant Registrations. doi.org/10.1002/plr2.20235

Li, Z., Bachleda, N., Wilson, B. Wood, E.D., Buck, J.W., Carter Jr., T.E., Rouf Mian, M.A., Fallen, B., Buckley, B., Noe, J., and Buckly, J.B. 2022. Registration of ‘G11-7013’ Soybean Germplasm with Resistance to Soybean Cyst Nematode, Southern Root-knot Nematode and Stem Canker, and High Meal Protein. J. Plant Registrations doi.org/10.1002/plr2.20204

Ghimire, B., Buck. J.W., Mergoum, M., Martinez-Espinoza, A.D. 2022. Fusarium Head Blight Epidemics in Soft Red Winter Wheat Fields in Georgia from 2018 to 2019. Plant Health Progress  

Harrelson, B.C., Ghimire, B., Kemerait, R.C., Culbreath, A.K., Li, Z., Severns, P.M., and Buck, J.W. 2021. Assessment of quinone outside inhibitor sensitivity and frogeye leaf spot race of Cercospora sojina in Georgia soybean. Plant Dis. 105: doi.org/10.1094/PDIS-02-21-0236-RE 

Ghimire, B., Martinez-Espinoza, A.D., Ghimire, B., Harrelson, B.C., Youmans, J., Mergoum, M., and Buck, J.W. 2021. First report of Fusarium poae causing Fusarium head blight of wheat in Georgia, USA. Plant Dis. Note. 105:491. doi.org/10.1094/PDIS-08-20-1779-PDN   

Ghimire, B., Sapkota, S., Bahri, B., Martinez-Espinoza, A., Buck, J.W., and Mergoum, M. 2020. Fusarium head blight and leaf rust diseases of wheat in the southeast United States: Current status and future perspective for breeding soft red winter wheat. Frontiers in Plant Science https://doi.org/10.3389/fpls.2020.01080 

Sapkota, S., Mergoum, M., Kumar, A., Fielder, J. D., Johnson, J. W., Lopez, B., Hutton, S., Ghimire, B., Buck, J., Chen, Z., and Harrison, S. 2020. A novel adult plant leaf rust resistance gene Lr2K38 mapped on wheat chromosome 1AL. The Plant Genome http://dx.doi.org/10.1002/tpg2.20061   

Gautam, S., Gadhave, K., Buck, J.W., Dutta, B., Coolong, T., Adkins, S., and Rajagopalbabu, S. 2020. Mixed-virus infections in a plant host and a hemipteran vector and implications for vector fitness and viral epidemics. Virus Research doi.org/10.1016/j.virusres.2020.198069

Sapkota, S., Hao, Y., Johnson, J. W., Buck, J., and Mergoum, M. 2019. Genome-wide association studies in of a worldwide collection of wheat genotypes reveals novel QTL for leaf rust resistance. Plant Genome Accepted pending revisions

DeLong, J.A., Stewart, J.E., Valencia-Botin, A., Pedley, K.F., Buck, J.W., and Brewer, M.T. 2019. Mining the Uromyces transversalis genome for molecular markers reveals a lack of genotypic diversity among gladiolus rust isolates. Peer J accepted pending revisions.

Sapkota, S., Hao, Y., Johnson, J. W., Lopez, B., Bland, D.E., Chen, Z., Sutton, S., Buck, J., Youmans, J. and Mergoum, M. 2019. Genetic mapping of a major gene for leaf rust resistance in soft red winter wheat. Mol. Breeding. 39:8

Emmitt, R.S., Stevenson, K.L, Martinez-Espinoza, A., and Buck, J.W. 2018. Fungicide sensitivity profiles of Puccinia hemerocallidis to pyraclostrobin, flutolanil, and thiophanate-methyl. Crop Prot. 110:103-107. https://doi.org/10.1016/j.cropro.2018.04.008

Childs, S.P., Buck, J.W., and Li, Z. 2018. Breeding soybeans with resistance to soybean rust (Phakopsora pachyrhizi). Plant Breeding http://dx.doi.org/10.1111/pbr.12595

Moparthi, S., Bradshaw, M., Frost, K., and Buck, J.W. 2018. First Report of powdery mildew caused by Golovinomyces spadiceus on Abelmoschus esculentus (okra). Plant Dis. Note https://doi.org/10.1094/PDIS-01-18-0179-PDN

Johnson, J.J., Chen, Z., Buck, J.W., Buntin, G.D.,  Babar, Md A., Mason, R.E., Harrison, S.A., Murphy, J.P., Ibrahim, A.M.H., Sutton, R.L., Simoneaux, B.E., Bockelman, H.E., Baik, B-K., Marshall, D., Cowger, C., Brown-Guedira, G.L., Kolmer, J.A., Jin, Y., Chen, X., Cambron, S.E., and Mergoum, M.. 2018. ‘Savoy’, an adapted soft red winter wheat cultivar for Georgia and the southeast regions of the United States. J. Plant Reg. 12:85-89. doi:10.3198/jpr2017.06.0039crc

Childs, S.P., King, Z., Walker, D., Harris, D., Pedley, K.F., Buck, J., Boerma, H.R., and Li, Z. 2018. Discovery of a seventh Rpp soybean rust resistance locus in soybean accession PI 605823. Theor. Appl. Genetics. 131:27-41. https://doi.org/10.1007/s00122-017-2983-4.

Emmitt, R.S., and Buck, J.W. 2017. Management of daylily rust with different fungicides and fungicide combinations. Plant Health Prog. 18:162-165.

Campbell, M., Li, Z., and Buck, J.W. 2017. Development of southern stem canker disease on soybean seedlings in the greenhouse using a modified toothpick inoculation assay. Crop Prot. 100:57-64. https://doi.org/10.1016/j.cropro.2017.05.026

Johnson, J.W., Chen, Z., Buck, J.W., Buntin, G.D., Babar, M.A., Mason, R.E., Harrison, S.A., Murphy, J.P., Ibrahim, A.M.H., Sutton, R.L., Simoneaux, B.E., Bockelman, H.E., Baik, B-K., Marshall, D., Cowger, C., Brown-Guedira, G. L., Kolmer, J. A., Jin, Y., Chen, X., Cambron, S.E., and Mergoum, M. 2017. 'GA 03564-12E6': A high-yielding soft red winter wheat cultivar adapted to Georgia and the South East regions of the United States. J. Plant Reg. 11:159 doi:10.3198/jpr2016.07.0036crc

King, Z, Childs, S.P., Harris, D.E., Pedley, K.F., Buck, J.W., Boerma, R.H., and Li, Z., 2017. A new soybean rust resistance allele from PI 423972 at the Rpp4 locus. Molecular Breeding. 37:62. doi:10.1007/s11032-017-0658-0

Petkar, A., Langston, D.B., Buck, J.W., Stevenson, K.L., and Ji, P. 2017. Sensitivity of Fusarium oxysporum f. sp. niveum to prothioconazole and thiophanate-methyl and gene mutation conferring resistance to thiophanate-methyl. Plant Dis. 101:366-371.