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Open AccessArticle

Weed Management Programs in Grain Sorghum (Sorghum bicolor)

Delta Research and Extension Center, Mississippi State University, 82 Stoneville Road, Stoneville, MS 38776, USA
Department of Plant and Soil Sciences, Mississippi State University, 316 Dorman Hall, Mississippi State, MS 39762, USA
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;
Received: 8 July 2019 / Revised: 12 August 2019 / Accepted: 13 August 2019 / Published: 16 August 2019
PDF [17899 KB, uploaded 16 August 2019]


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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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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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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