A Multiple Year Study Evaluating Cotton Tolerance to Metribuzin

Cotton is commonly rotated after corn in the Southeast. Corn harvest is usually completed by late summer allowing enough time for problematic weeds, like Palmer amaranth, to grow and produce weeds in the fall thereby increasing the weed seed bank.  The use of a residual herbicide, such as metribuizin, after corn harvest may reduce the seed bank for the upcoming cotton crop.  Metribuzin offers Georgia growers a unique ability to utilize another herbicide mode of action. However, the labeled rotational interval for metribuzin would prohibit a grower from planting cotton in the following season.  These experiments were conducted to determine cotton sensitivity to metribuzin.