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Senior Research Scientist
Texas A&M AgriLife Research |
Education
B. S. Addis Ababa University, Ethiopia.
M.S. Plant Pathology, University of California, Davis.
Ph. D. Plant Pathology, University of California, Davis.
Research Interests
Ecology and epidemiology of plant diseases.
Recent Publications
Almas, L. K., Price, J. A., Workneh, F., and Rush, C. M. 2016. Quantifying economic losses associated with levels of wheat streak mosaic incidence and severity in the Texas High Plains. Crop Protection 88:155-160.
Rashed, A., C. M. Wallis, Workneh, F., Paetzold, L. and Rush, C. M. 2016. Variations in Zebra Chip disease expression and tuber biochemistry in response to vector density. Phytopathology 106:854-860.
Workneh, F. Rashed, A., Paetzold, L, and Rush, C.M. 2016. Population dynamics of released potato psyllids and their bacteriliferous status in relation to disease incidence in caged field plots. Plant Disease 100:1762-1767.
Rush, C. M., Workneh, F., and Rashed, A. 2015. Significance and epidemiological aspects of late-season infections in the management of potato zebra chip. Phytopathology 105:929-936.
Rashed, A., Workneh, F., Paetzold, L., and Rush, C. M. 2015. Emergence of ‘Candidatus Liberibacter solanacearum’-infected seed potatoes in relation to the time of infection. Plant Disease 99:274-280.
Wallis, C. M., Rashed, A., Chen, J., Paetzold, L., Workneh, F., Rush, C. M. 2014. Effects of potato psyllid-vectored ‘Candidatus Liberibacter solanacearum’ infection on potato leaf and stem physiology. Phytopathology 105:189-198.
Wallis, C. M., Rashed, A., Wallingford, A. K., Paetzold, L., Workneh, F., and Rush, C. M. 2014. Similarities and differences in physiological responses to ‘Candidatus Liberibacter solanacearum’ infection among different potato cultivars. Phytopathology 104:126-133.
Mirik, M., Ansley, R.J., Price, J.A., Workneh, F., and Rush, C.M. 2013. Remote monitoring of wheat streak mosaic progression using sub-pixel classification of landsat 5 TM imagery for site-specific disease management in winter wheat. Advances in Remote Sensing 2:16-28.
Rashed, A., Wallis, C.M., Paetzold, L., Workneh, F., and Rush, C.M. 2013. Zebra chip disease and potato biochemistry: Tuber physiological changes in response to ‘Candidatus Liberibacter solanacearum’ infection over time. Phytopathology 103:419-426.
Workneh, F., Henne, D.C., Goolsby, J.A., Crosslin, J.M., Whipple, S., Bradshaw, J.D., Rashed, A., Paetzold, L., Harveson, R.M., and Rush, C.M. 2013. Characterization of management and environmental factors associated with regional variations in potato zebra chip occurrence. Phytopathology 103:1235-1242.
Rashed, A., Nash, D., Paetzold, L., Workneh, F., and Rush, C.M. 2012. Transmission efficiency of Candidatus Liberibacter solanacearum and potato zebra chip disease progress in relation to pathogen titer, vector numbers and feeding sites. Phytopathology. 102:1079-1085.
Workneh, F., Henne, D. C., Childers, A. C., Paetzold, L., and Rush, C. M. 2012. Assessments of the edge effect in intensity of potato zebra chip disease. Plant Disease 96:943:947.
Henne, D. C., Workneh, F., Rush, C. M. 2012. Spatial patterns and spread of potato zebra chip disease in the Texas Panhandle. Plant Disease 96:948-956.
Nansen, C. Vaughn, K., Xue, Y., Rush, C., Workneh, F., Goolsby, J., Troxclair, N. Anciso, J., Gregory, A., Holman, D., Hammond, A., Mirkov, E., Tantravahi, P., and Martin, X. 2012. A decision-support tool to predict spray deposition of insecticides in commercial potato fields and its implications for their performance. Journal of Economic Entomology 104:1138-1145.
Mirik, M., Jones, D. C., Workneh, F., Ansley, J., and Rush, C. M. 2011. Satellite remote sensing of wheat infected by Wheat streak mosaic virus. Plant Disease 95:4-12.
Henne, D. C., Workneh, F., Rush, C. M. 2010. Movement of Bactericera cockerelli (Heteroptera: Psyllidae) in relation to potato canopy structure. Journal of Economic Entomology 103:1524-1530.
Henne, D., Workneh, F., Gudmestad, N., and Rush, C. M. 2010. Characterization and epidemiological significance of potato plants grown from seed tubers affected by zebra chip disease. Plant Disease 94:659-665.
Valendia-Parra, M., Rejesus, R., Jones, D. C., Price, J. A., and Workneh, F., Rush, C. M. 2010. Economic impact of the Wheat streak mosaic virus in the Texas High Plains. Crop Protection 29:699-703.
Price, J. A., Workneh, F., Evett, S., Jones, D. C., Arthur, J. and Rush, C. M. 2010. Effects of Wheat streak mosaic virus on root development and water use efficiency of winter wheat. Plant Disease 94:766-770.
Workneh, F., Price, J. A., Jones, D. C., and Rush, C. M. 2010. Wheat streak mosaic: a classic case of plant disease impact on soil water content and crop water-use efficiency. Plant Disease 94:771-774.
Workneh, F., Jones, D. C., and Rush, C. M. 2009. Quantifying wheat yield across the field as function of wheat streak intensity: a state space approach. Phytopathology 99:432-440.
Allen, T. W., Workneh, F., Steddom, K. C. Peterson, G. L., and Rush, C. M. 2008. The influence of tillage on dispersal of Tilletia indica teliospores from a concentrated point source. Plant Disease 92:343-350.
Allen, T. W., Maples, Workneh, F., H. W., Stein, J. M., and Rush, C. M. 2008. Distribution and recovery of Tilletia indica teliospores from regulated wheat fields in Texas. Plant Disease 92:339-343.
Workneh, F., Allen, T. W., Narasimhan, B., Srinivasan, R., and Rush, C. M. 2008. Rainfall and temperature distinguish between Karnal bunt-postive- and negative years in wheat fields in Texas. Phytopathology 98:95-100.
Workneh, F. and Rush, C. M. 2006. Weather factors associated with development of sorghum ergot in the Texas Panhandle. Plant Disease 90:717-722.
Workneh, F., Narasimhan, B., Srinivasan, R., and Rush, C. M., 2006. Assessment of regional site-specific sorghum ergot severity potential using radar-rainfall measurement. Plant Disease 90:704-707.
Workneh, F., Narasimhan, B., Srinivasan, R., and Rush, C. M., 2005. Potential of radar estimated rainfall for plant disease risk forecast. Phytopathology 95:25-27.
