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31 March 2021 Emergence Patterns of Winter and Summer Annual Weeds in Ethiopian Mustard (Brassica carinata) Cropping System
Ruby Tiwari, Theresa A. Reinhardt Piskackova, Pratap Devkota, Michael J. Mulvaney, Jason A. Ferrell, Ramon G. Leon
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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.

© The Author(s), 2021. Published by Cambridge University Press on behalf of the Weed Science Society of America.
Ruby Tiwari, Theresa A. Reinhardt Piskackova, Pratap Devkota, Michael J. Mulvaney, Jason A. Ferrell, and Ramon G. Leon "Emergence Patterns of Winter and Summer Annual Weeds in Ethiopian Mustard (Brassica carinata) Cropping System," Weed Science 69(4), 446-453, (31 March 2021). https://doi.org/10.1017/wsc.2021.20
Received: 24 November 2020; Accepted: 3 March 2021; Published: 31 March 2021
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