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United States Department of Agriculture

Agricultural Research Service

Krishna Narasim. Reddy

Research Leader

   Dr. Krishna N. Reddy
 Research Leader

 Crop Production Systems Research Unit
 141 Experiment Station Road
 PO Box 350
 Stoneville, MS  38776

 Office:  662.686.5272
 FAX:    662.686.5422
 Email: Krishna.Reddy@ars.usda.gov

Dr. Reddy's current research deals with weed biology and integrated weed management systems for soybean, corn, and cotton, and assessment of benefits and safety aspects of transgenic crops. The areas of research include conservation tillage, cover crops, narrow row and twin row spacing, crop rotations, herbicide-resistant crops, and herbicide drift. Shifts in weed species and populations as a consequence of changes in production practices and weed management systems are evaluated. Long-term impact of these production practices and weed management systems on soil properties, microbial ecology, and plant pathogens are being investigated in collaboration with other scientists.

Dr. Reddy, in collaboration, elucidated causes for glyphosate injury in glyphosate-resistant soybean and determined glyphosate effects on secondary metabolites and glyphosate metabolite accumulation. It was demonstrated for the first time that ‘yellow flashes’ in soybean were from aminomethylphosphonic acid, a metabolite of glyphosate. Also, demonstrated that reduced absorption and translocation of glyphosate as the cause for resistance in glyphosate-resistant horseweed and Italian ryegrass. Dr. Reddy devised strategies to reduce redvine and trumpetcreeper infestations by integrating glyphosate and fall deep tillage. Dr. Reddy has conducted extensive research on crop rotation, narrow row, twin row, cover crop, and reduced tillage production systems, herbicide uptake and translocation, herbicide interaction in soils and plant residues, herbicide foliar wash off, QSAR modeling, weed biology and control.

Dr. Reddy has authored and co-authored 160 research articles, reviews, or book chapters, and 220 abstracts. Dr. Reddy has received several awards: Weed Scientist of the Year (2011) Southern Weed Science Society; Fellow (2010) of Weed Science Society of America; 2008 Outstanding Research Award from the Weed Science Society of America; 2005 Fellow from the Indian Society of Weed Science; 2004 Education Award from the Mississippi Weed Science Society; 2002 Research Award from the Mississippi Weed Science Society. He is an adjunct professor at Mississippi State University. Dr. Reddy has served on graduate student committees, led research program of postdoctoral research associates, and hosted international visiting scientists. He is currently an Associate Editor for Weed Technology..


Last Modified: 10/20/2014
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