Miguel from Riverbank writes
Regular small ants spray not penetrating under rocks
If you are able to move the rock bed to access the soil underneath, that will provide you the best results. Talstar P works as a repellent but does not work to kill off the colony. Using Termidor SC as a perimeter spray 1ft up and 1ft out from the structure will provide you with 6 month ant control. But with out being able to access the dirt area under the rocks, you might not get full results. Using Maxforce Complete Granular Bait sprinkling as a bad around the structure or in bait plate stations will help as well. Maxforce Complete Brand Granular Bait may be sprinkled around structures and/or applied to refillable/serviceable bait stations as outlined below. Sprinkle this product evenly in a 1-2 foot wide band adjacent to the structure at a rate of 0.5 oz (one tablespoon) of bait per 25 linear feet. NOTE: Around structures the total application should not exceed 4-8 oz per 200-400 linear feet (or 0.5 oz per 25 linear feet). Be sure to treat areas such as porches, patios, driveways, sidewalks, flower gardens, landscape timbers and around trees, wood piles, air conditioning units and garbage receptacles.
Answer last updated on: 03/24/2015