​​Seed Burial and Persistence of Palmer amaranth and Waterhemp

May 2019 | 22 min., 56 sec.
by Jason K. Norsworthy
University of Arkansas

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Summary

​Information regarding the impact of tillage methods on seed burial depth and persistence of Palmer amaranth and waterhemp allows growers to make informed decisions on how best to manage these weeds. In this video, seed production potential of these weeds is discussed along with depth of seed burial and the likelihood for these weeds to emerge from a one-time deep tillage or continuous no-tillage production systems. Persistence of both weeds in the soil seedbank is compared when lying on the soil surface or buried to a 6-inch depth over a three-year period for northern and southern U.S. geographies where soybean is typically grown. Management strategies using tillage along with the need for preventing escapes are examined with recommendations based on current level of infestation in fields.

About the Presenter

Jason K. NorsworthyJason K. Norsworthy earned his BS in Plant Sciences–Agronomy from Louisiana Tech University in 1995 and then his MS in Plant Sciences–Weed Science from the University of Arkansas in 1997. After completing his PhD in Plant Sciences–Weed Science in 2000 at the University of Arkansas, he spent 6 years on the faculty at Clemson University. He returned to the University of Arkansas in 2006 and currently holds the academic rank of professor with tenure in the Crop, Soil, and Environmental Sciences Department; he also holds the University of Arkansas endowed Chair of Weed Science. Dr. Norsworthy spends much of his time conducting research on developing strate​gies to manage herbicide-resistant weeds and reduce the risk of herbicide resistance. He has documented 12 new herbicide-resistant weeds in Arkansas and surrounding states. He also has been actively involved in research to understand the off-target mov​ement of auxin herbicides. His research includes applied and basic studies on most row crops in collaboration with basic R&D companies, other universities worldwide, and governmental entities that have a stake in sustainable weed management.

Contact Information:
Email: jnorswor@uark.edu

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