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ARS Home » Southeast Area » Stoneville, Mississippi » Crop Production Systems Research » People » Krishna Reddy

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

Dr. Reddy received a B.S. in Agriculture (1973) and a M.S. in Agronomy (1975) from the University of Agricultural Sciences, Bangalore. Later, he earned his Ph.D. in Weed Science from the Ohio State University (1987). After a few postdoctoral stints, Dr. Reddy joined the USDA-ARS Crop Production Systems Research Unit (formerly Southern Weed Science Research Unit), Stoneville, Mississippi in 1992, where he currently serves as a Research Leader of the Crop Production Systems Research Unit.

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 authored and co-authored 190 research articles, reviews, or book chapters, and 230 abstracts. Dr. Reddy has received several awards: Weed Scientist of the Year (2011) from 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 was an Associate Editor for Weed Technology (2004-2011).