Cotton Tolerance to Metribuzin

Cotton is often 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 herbicide, such as metribuizin, after corn harvest may reduce the number of weed seeds generated resulting in less weeds needed to be controlled in the cotton crop.  However, the labeled rotational interval for metribuzin would prohibit a grower from planting cotton in the following season.  Thus, two experiments were conducted to determine the tolerance of cotton to metribuzin.