​Late-Season Weed Management for Reducing Seedbank Size

November 2020 | 19 min., 04 sec.
by Muthu Bagavathiannan
Texas A&M AgriLife Research


Weed seedbank management is at the core of integrated weed management for annual weeds. Seed rain from uncontrolled weed escapes is the major source of annual seedbank replenishment in arable fields. Weed escapes during the late season (weeds that escaped control activities during the season and/or cohorts that emerged late, after control activities were stopped) often are not managed, because doing so is perceived as a cost that doesn’t help with yield increase or profits in the current season. However, seed production from these random escapes can favor the persistence of the weed species in the field and increase future weed management costs. Several strategies can be implemented during the late season to minimize viable seed production in uncontrolled weed escapes, including hand chopping, herbicide applications, weed zapping, and harvest weed seed control, among others.​​

About the Presenter

Muthu Bagavathiannan​​​Muthu Bagavathiannan received his PhD in weed ecology at the University of Manitoba in 2010. After postdoctoral research training on the evolutionary dynamics of herbicide resistance in weeds at the University of Arkansas, he joined the Department of Soil and Crop Sciences at Texas A&M University (TAMU) in 2014 as an assistant professor of weed science and agronomy. He was tenured and promoted to associate professor in 2019. Dr. Bagavathiannan’s current research focuses on weed ecology, evolution, and integrated management. A notable research area is weed seedbank ecology and management to minimize long-term weed persistence. His work on herbicide resistance modeling has assisted in the development of best management practices (BMPs), and he is involved in the development of decision-support tools to help disseminate sound BMPs. Dr. Bagavathiannan collaborates widely with eminent research groups locally, nationally, and internationally. He has published more than 60 peer-reviewed journal articles and 10 book chapters. At TAMU, he teaches an undergraduate level course on weed ecology and management and a graduate course on weed ecology and biology. He received the Vice Chancellor’s Outstanding Early Career Research Award from the College of Agricultural and Life Sciences at TAMU in 2018 and the Outstanding Early Career Researcher Award from the Weed Science Society of America in 2020.

Contact Information:
Email: muthu@tamu.edu


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