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Ned Tisserat

Ned Sampling Walnut FacultyPlant Pathology

Retired Professor and Extension Specialist
Office: C202 Plant Sciences

Research Interests:

I conduct applied and basic research into the causes and management of turfgrass, tree, ornamental and small grain diseases. These studies involve understanding the biology, genetic diversity, diagnostics and management of these diseases. My research group is currently studying snow mold caused by Typhula species with the goal of improving integrated management. I also am involved in developing molecular marker techniques for high consequence pathogens such as Pythium species. Recently we discovered a new and potentially catastrophic disease of black walnut called thousand cankers, and we are researching ways to prevent movement of the pathogen and insect vector. I provide extension programming for turf, ornamentals, small grains and some row crops and serve as the IPM  and Pesticide Safety coordinator. I am currently involved in the development of basic and advanced plant pest diagnostic training for Colorado Master Gardeners (CMG). The purpose of this program is to insure that diagnostics and pest management information supplied to consumers by CMG is accurate and science based.

Selected Publications:

Adhikari, B. N., Hamilton, J. P., Zerillo, M. M., Tisserat, N., Lévesque, C. A., and Buell, C.R. 201_. Comparative genomics reveals insight into virulence strategies of plant pathogenic oomycetes. PLoS ONE (in Press).

Zerillo, M. M., Adhikari, B.N., Hamilton, J. P., Buell, C. R., Lévesque, C.A., and Tisserat, N. 201_. Carbohydrate-active enzymes in Pythium and their role in plant cell wall and storage polysaccharide degradation. PLoS ONE (in Press).

Blunt, T. D., Koski, A., and Tisserat, N. 201_. Effect of snow removal on Typhula blight development at high elevation golf courses in Colorado. Plant Health Progress (in Press)

Blunt, T. D., Koski, A., and Tisserat, N. 201_. Typhula blight severity as influenced by the number of preventive fungicide applications and snow compaction. Plant Health Progress (in Press)

Luna, E.K., Sitz, R.A., Cranshaw W.S., and Tisserat, N. A. 201_. The effect of temperature on survival of Pityophthorus juglandis Blackman (Coleoptera: Curculionidae). J. Env. Ent. (in Press)

Ibarra Caballero, J., Zerillo, M.M., Snelling, J, Boucher, C., and Tisserat, N. 2013. Genome sequence of Xanthomonas arboricola pv. corylina isolated from Turkish filbert in Colorado. Genome Announc. 1(3):e00246-13. doi:10.1128/genomeA.00246-13.

Utley, C., Nguyen, T., Roubtsova, T.V., Coggeshall, M. Ford, T. C., Grauke, L.J. Graves, A.D., Leslie, C.A, McKenna, J., Woeste, K., Yaghmour, M.A., Cranshaw, W., Seybold, S.J., Bostock, R.M., and Tisserat, N. 2013. Susceptibility of walnut and hickory species to Geosmithia morbida. Plant Dis. 97:601-607.

Manmathan, H., Shaner, D., Snelling, J., Tisserat, N., and Lapitan, L. 2013. Virus-induced gene silencing of Arabidopsis thaliana gene homologues in wheat identifies genes conferring improved drought tolerance. Journal of Experimental Botany 2013; doi: 10.1093/jxb/ert003

Byamukama, E., Seifers, D. L., Hein, G. L., De Wolf, E., Tisserat, N. A., Langham, M. A. C., Osborne, L. E., Timmerman, A., and Wegulo, S. N. 2013. Occurrence and distribution of Triticum mosaic virus in the central Great Plains. Plant Dis. 97:21-29.

Freeland, E., Cranshaw, W., and Tisserat, N. 2012. Effect of Geosmithia morbida isolate and temperature on canker development in black walnut. Plant Health Progress doi:10.1094/PHP-2012-0618-01-RS.

Ibarra, J., Snelling, J., Alexander, K., and Tisserat, N. 2012. Leaf spotting of Turkish filbert in Colorado caused by Xanthomonas arboricola pv. corylina and Pseudomonas syringae pv. syringae. Plant Health Progress doi:10.1094/PHP- 2012-0517-01-BR.

Hamilton, J., Adhikari, B., Neeno-Eckwall, E., Perna N, Levesque, A., Tisserat, N., Leach, J. and Buell, C.R. 2011. The Comprehensive Phytopathogen Genomics Resource: A web-based resource for data-mining plant pathogen genomes. Database doi: 10.1093/database/bar053.

Triplett, L. R., Hamilton, J. P., Buell, C. R., Tisserat, N. A., Verdier, V., Zink, F., and Leach, J. E. 2011. Genomic analysis of Xanthomonas oryzae isolates from rice grown in the United States reveals substantial divergence from known X. oryzae pathovars. Appl. Envir. Microbiol. 77: 3930 – 3937.

Tisserat, N., Cranshaw, W., Putnam, M. L., Pscheidt, J., Leslie, C. A., Murray, M., Hoffman, J., Barkley, Y., Alexander, K., and Seybold, S. J. 2011. Thousand cankers disease is widespread in black walnut in the western United States. Plant Health Progress doi:10.1094/PHP-2011-0630-01-BR.

Kolařík, M. Freeland, E. Utley, C. and Tisserat, N. 2011. Geosmithia morbida sp. nov. a new phytopathogenic species living in symbiosis with the walnut twig beetle (Pityophthorus juglandis) on Juglans in the USA. Mycologia 103:325–332.

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