James Allen Wrather
Division of Plant Sciences
(573) 379-5431 Fax:
Soybean disease control and extension plant pathology.
Soybean production in Missouri averaged 164 million bushels per year from 1998 to 2000. Unfortunately, production was reduced by diseases each year, and 2000 yields were cut 13.9 million bushels. Soybean disease losses declined in Missouri from 1974 to 2000 due primarily to introduction of disease-resistant varieties. Increased research is needed to further reduce soybean losses to diseases. Dr. Wrather's research focuses on integrated disease management in soybean. His current research interests include the effects of tillage, planting dates, and cultivars on disease incidence and severity, and on soybean yield losses caused by diseases both nationally and internationally. He is also responsible for extension programs in cotton, rice, and grain sorghum disease management.
- Bradley, C. A., T. W. Allen, A. E. Dorrance, E. J. Dunphy, L. J. Giesler, D. E. Hershman, C. A. Hollier, V. Horn, and J. A. Wrather. 2010. Evaluation of the soybean rust pest information platform for extension, and education (PIPE) public website's impact of certified crop advisors. Online. Plant Health Progress doi:10.1094/PHP-2010-In Press.
- Wrather, J. A., W. E. Stevens, E. D. Vories, T. L. Kirkpatrick, J. D. Mueller, and A. Mauromoustakos. 2010. The use of root gall ratings to determine high risk zones in cotton fields infested by Meloidogyne incognita. Crop Sci. 50: In Press.
- Mengistu, A., J. Smith, N. Bellaloui, R. Paris, and A. Wrather. 2010. Irrigation and time of harvest effects on evaluation of selected soybean accessions against Phomopsis longicolla. Crop Sci. 50: In Press.
- Shannon, J. G., R. L. Nelson, J. D. Lee, and J. A. Wrather. 2010. Registration of LG04-6863 soybean germplasm line with diverse pedigree. J. Plant Registrat. 4:70-72.
- Wrather, A., Shannon, G., Balardin, R., Carregal, L., Escobar, R., Gupta, G. K., Ma, Z., Morel, W., Ploper, D., and Tenuta, A. 2010. Diseases effects on soybean yields in the top eight soybean-producing countries in 2006. Online. Plant Health Progress doi:10.1094/PHP-2010-0125-01-RS.
- Rhine, M., G. Stevens, G. Shannon, A. Wrather, and D. Sleper. 2009. Yield and nutritional responses to water logging of soybean cultivars. Online. Irrig. Sci. doi:10.1007/s00271-009-0168-x.
- Wrather, J. A., and S. R. Koenning. 2009. Effects of diseases on soybean yields in the United States 1996 to 2007. Online. Plant Health Progress doi:10.1094/PHP-2009-0401-01-RS.
- Mian, R., J. Bond, T. Joobeur, A. Mengistu, W. Wiebold, G. Shannon, and A. Wrather. 2009. Identification of soybean genotypes resistant to Cercospora sojina by field screening and molecular markers. Plant Disease 93:408-411.
- Shannon, J. G., J. Lee, J. A. Wrather, D. A. Sleper, M. A. R. Mian, J. P. Bond, and R. T. Robins. 2009. Registration of 'S99-2281' soybean germplasm line with resistance to frogeye leaf spot and three nematode species. J. Plant Registrations 3:94-98.
- Mengistu, A., K. N. Reddy, R. M. Zablotowicz, and J. A. Wrather. 2009. Propagule densities of Macrophomina phaseolina in soybean tissue and soil as affected by tillage, cover crop, and herbicide. Plant Health Progress doi:110.1094/PHP-2009-0130-01-RS.
- Pathan, Md. S., K. M. Clark, J. A. Wrather, Sciumbato, G. L., J. G. Shannon, H. T. Nguyen, and D. A. Sleper. 2009. Registration of soybean germplasm SS93-6012 and SS93-6181, resistant to Phomopsis seed decay. J. Plant Registrations 3:91-93.
- Stevens, G., A. Wrather, M. Rhine, D. Dunn, and E. Vories. 2008. Predicting rice yield response to midseason nitrogen with plant area measurements. Agronomy Journal 100:387-392.
- Wrather, A., G. Shannon, T. Carter, J. Bond, J. Rupe, and A. Almeida. 2008. Reaction of drought tolerant soybean genotypes to Macrophomina phaseolina. Plant Health Progress doi:110.1094/PHP-2008-0618-01-RS.
- Wrather, J. A., B. J. Phipps, W. E. Stevens, and A. S. Phillips. 2008. Cotton planting date and plant population effects on yield and quality in the Mississippi Delta. Journal of Cotton Science 12:1-7.