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Farmers should plan ahead to make a pre-harvest application to terminate grain sorghum and control late-season weeds prior to harvest.After producing seed, grain sorghum remains green until killed by tillage, freezing temperatures, or a desiccant. A pre-harvest application should be made after grain moisture content of grain sorghum falls to 30% or less. A timely pre-harvest application can improve harvest efficiency, reduce late-season weed seed production, and conserve soil moisture for a following crop.