Free your yard from fire ant mounds with Spectracide Fire Ant Shield Mound Destroyer Granules. This deep-reaching formula is made with Accelerator II technology to directly and quickly release active ingredients into the problem mound. The granules begin to kill within minutes and will eliminate the queen and the colony in 24 hours. You can use the treatment to destroy new mounds as they appear and for best results apply the product during morning or evening hours.