Herbicide-tolerant grain sorghum holds promise for Mississippi growers


A new herbicide-tolerant grain sorghum, Inzen Z, may help make the crop more practical and profitable for Mississippi growers, says Erick Larson, who previewed the system at the recent Mississippi State University Technology Field Day.

Grain sorghum has become more popular as an alternative crop for many Mississippi producers, and the state has seen a significant increase in sorghum acres this year, says Larson, Mississippi State University associate Extension/research professor of Plant and Soil Sciences. “Our producers can grow this crop well, and the state has often led the U.S. in sorghum yield.”

Inzen Z was developed through traditional breeding methods to insert ALS herbicide resistance into sorghum. “DuPont Crop Protection is bringing it to market, and we’re excited to be working with them in evaluating this product,” Larson says.

The non-GMO herbicide tolerance trait will deliver enhanced grass weed control in grain sorghum to help growers improve crop yield and quality, according to DuPont Crop Protection and Advanta US, which have signed a joint agreement to commercialize the Inzen Z trait. The Z stands for Zest, a herbicide formulation to be used with the hybrids.

This advance in sorghum genetics will give growers greater ability to control yield-limiting grass weeds in grain sorghum or milo, a key crop for areas with limited rainfall, the company says.

It is estimated that annual grass weeds reduce U.S. sorghum yields by approximately 20%. The Inzen Z herbicide tolerance trait will offer Mississippi growers a viable herbicide to control johnsongrass in sorghum, Larson says, and will potentially provide more effective control of key grass weeds, including broadleaf signalgrass, barnyardgrass, crabgrass, and browntop millet.

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