Weed management in sorghum cultivation M. Bagavathiannan, Texas AM W. Everman, North Carolina State University, USA; P. Govindasamy, Texas AM A. Dille and M. Jugulam, Kansas State University, USA; and J. Norsworthy, University of

Weed management in sorghum cultivation M. Bagavathiannan, Texas AM W. Everman, North Carolina State University, USA; P. Govindasamy, Texas AM A. Dille and M. Jugulam, Kansas State University, USA; and J. Norsworthy, University of Arkansas, USA1 Introduction2 Critical period for weed control in sorghum3 Chemical options for weed control in sorghum4 Herbicide-resistant sorghum technology5 Non-chemical options for weed control in sorghum6 Weed shifts with production practices7 Conclusion8 Where to look for further information9 ReferencesSorghum (Sorghum bicolor L.), an important food and feed crop worldwide, is considered a low-input, energy-efficient, and drought-tolerant crop, capable of growing well under marginal environmental conditions. The United States is the second largest producer and the leading exporter of grain sorghum in the world (USDA-FAS, 2016). In 2017, grain sorghum was planted on about 2.5 million ha throughout the United States (USDA-NASS, 2017). The total US export of grain sorghum in 2016 was valued >$2 billion (USDA-FAS, 2016), making it an important agricultural commodity in the United States. Kansas and Texas are the top two grain-sorghum-producing states with 1.1 and 0.7 million ha, respectively (USDA-NASS, 2017). Grain sorghum is a significant crop in other states such as Colorado, Oklahoma, South Dakota and Nebraska, and to some extent in the Midsouth in Arkansas, Missouri, Mississippi and Louisiana as well as in the Southeast in North Carolina (USDA-NASS, 2017).