Ortho Orthene Fire Ant Killer 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 MAX Fire Ant Killer Broadcast Granules as part of the Fire Ant 2-Step Program. Ortho Orthene Fire Ant Killer is guaranteed to kill-or your money back. Treats up to 162 mounds.