Ortho® Orthene® Fire Ant Killer1 kills the queen and destroys the mound. Watering-in is not necessary. Use it as a mound treatment for home lawns and around ornamental plants (including flowers, shrubs, and trees). Try not to disturb the mounds while treating. This product can be used along with Ortho® Fire Ant Killer Broadcast Granules as part of the Fire Ant 2-Step Program. Ortho® Orthene® Fire Ant Killer 1 is guaranteed to kill-or your money back.