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 two-step program. Ortho® Orthene® fire ant killer is Assured to kill-or your money back.