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Open AccessArticle

Weed Management Programs in Grain Sorghum (Sorghum bicolor)

1
Delta Research and Extension Center, Mississippi State University, 82 Stoneville Road, Stoneville, MS 38776, USA
2
Department of Plant and Soil Sciences, Mississippi State University, 316 Dorman Hall, Mississippi State, MS 39762, USA
3
Department of Crop, Soil and Environmental Sciences, University of Arkansas, 1366 W. Altheimer Dr., Fayetteville, AR 72704, USA
*
Authors to whom correspondence should be addressed.
Agriculture 2019, 9(8), 182; https://doi.org/10.3390/agriculture9080182
Received: 8 July 2019 / Revised: 12 August 2019 / Accepted: 13 August 2019 / Published: 16 August 2019
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Abstract

A field study was conducted in Arkansas over three years to evaluate various herbicide treatments, including sequential and tank-mix applications for weed control in grain sorghum (Sorghum bicolor). The herbicide treatments used were quinclorac, atrazine + dimethenamid-p, S-metolachlor followed by (fb) atrazine + dicamba, dimethenamid-p fb atrazine, S-metolachlor + atrazine fb atrazine, S-metolachlor + mesotrione, and S-metolachlor fb prosulfuron. All herbicide treatments provided excellent (90% to 100%) control of Ipomoea lacunosa, Ipomoea hederacea var. integriuscula, and Sida spinosa by 12 weeks after emergence. Quinclorac and S-metolachlor fb prosulfuron provided the lowest control of Ipomoea lacunosa, Urochloa platyphylla, Amaranthus palmeri, and Ipomoea hederacea var. integriuscula. Weed interference in the non-treated control reduced grain sorghum yield by 50% as compared to the weed-free control. S-metolachlor + mesotrione and S-metolachlor fb prosulfuron reduced sorghum yields by 1009 to 1121 kg ha−1 compared to other herbicide treatments. The five best herbicide treatments in terms of weed control and grain sorghum yield were quinclorac, atrazine + dimethenamid-p, S-metolachlor fb atrazine + dicamba, dimethenamid-p fb atrazine, and the standard treatment of S-metolachlor + atrazine fb atrazine. View Full-Text
Keywords: S-metolachlor; atrazine; quinclorac; dimethenamid-p; mesotrione; prosulfuron; dicamba S-metolachlor; atrazine; quinclorac; dimethenamid-p; mesotrione; prosulfuron; dicamba
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Bararpour, T.; Hale, R.R.; Kaur, G.; Singh, B.; Tseng, T.-M.P.; Wilkerson, T.H.; Willett, C.D. Weed Management Programs in Grain Sorghum (Sorghum bicolor). Agriculture 2019, 9, 182.

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