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Emergence patterns of winter and summer annual weeds in Ethiopian mustard (Brassica carinata) cropping system

Published online by Cambridge University Press:  31 March 2021

Ruby Tiwari
Affiliation:
Graduate Research Assistant, University of Florida/IFAS, West Florida Research and Education Center, Jay, FL, USA
Theresa A. Reinhardt Piskackova
Affiliation:
Postdoctoral Research Associate, Czech University of Life Sciences Prague, Food and Natural Resources, Department of Agroecology and Crop Production, Prague, Czech Republic
Pratap Devkota*
Affiliation:
Assistant Professor, University of Florida/IFAS, West Florida Research and Education Center, Jay, FL, USA
Michael J. Mulvaney
Affiliation:
Assistant Professor, University of Florida/IFAS, West Florida Research and Education Center, Jay, FL, USA
Jason A. Ferrell
Affiliation:
Professor and Director, University of Florida/IFAS, Center for Aquatic and Invasive Plants, Gainesville, FL, USA
Ramon G. Leon*
Affiliation:
Associate Professor, North Carolina State University, Department of Crop and Soil Sciences, Center for Environmental Farming Systems, Genetic Engineering and Society Center, Raleigh, NC, USA
*
Authors for correspondence: Ramon G. Leon, North Carolina State University, Department of Crop and Soil Sciences, Campus Box 7620, Williams Hall, Raleigh, NC 27695 (Email: rleon@ncsu.edu); and Pratap Devkota, University of Florida/IFAS, West Florida Research and Education Center, 4253 Experiment Road, Jay, FL 32565. (Email: pdevkota@ufl.edu)
Authors for correspondence: Ramon G. Leon, North Carolina State University, Department of Crop and Soil Sciences, Campus Box 7620, Williams Hall, Raleigh, NC 27695 (Email: rleon@ncsu.edu); and Pratap Devkota, University of Florida/IFAS, West Florida Research and Education Center, 4253 Experiment Road, Jay, FL 32565. (Email: pdevkota@ufl.edu)

Abstract

Ethiopian mustard (Brassica carinata A. Braun) is a biofuel crop recently introduced in the southeastern United States. For this crop to be successful, integrated weed management strategies that complement its rotation with summer cash crops must be developed. The objectives of this research were to evaluate the effect of previous season summer crops on winter weed emergence patterns during Ethiopian mustard growing season and to assess the impact of planting Ethiopian mustard on the emergence patterns of summer weed species. Gompertz models were fit to winter and summer weed emergence patterns. All models represented more than 80% of the variation, with root mean-square error values less than 0.20. The emergence pattern for winter weed species was best described using growing degree-day accumulation, and this model can be utilized for implementing weed control strategies at the critical Ethiopian mustard growth stages. The results also showed that summer weeds can emerge during the winter in northern Florida but do not survive frost damage, which might create off-season seedbank reductions before the summer crop growing season.

Information

Type
Research Article
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of the Weed Science Society of America

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