How to Get Rid of Fire Ants in Your Yard

Imported fire ants build dome-shaped mounds with no central entry hole (other ants have an obvious crater). Tap the side of the mound with a stick: fire ants pour out aggressively in seconds. Workers are 1/8 to 1/4 inch long, reddish-brown, and very fast. Stings burn (hence the name) and leave white pustules 24 hours later. If a mound has a visible crater entry or the ants don't swarm at disturbance, it's a different species — skip this protocol.

A mature fire-ant colony has one or more queens 1–2 feet underground in a central chamber. Pouring liquid insecticide on the mound surface kills only the workers within ankle reach; the queen survives, the colony rebuilds, and the disturbance triggers a defensive 'budding' response where queens split off to make new mounds nearby. The Texas A&M two-step protocol — bait first, then mounds — is the only consumer-level method that takes out queens.

Use a hand-crank spreader to broadcast 1–1.5 lb of fire-ant bait per acre over the entire infested yard (not on mounds — between them). Workers find the bait within hours and carry it back to feed the queen. Apply when the ground is dry and no rain is forecast for 24 hours. Don't water in. The queen dies in 1–4 weeks; the colony collapses. One application in early spring + one in early fall covers most yards.

Workers need time to find bait, return to the queen, and feed her. Walking the yard is fine; mowing is fine; disturbing the mounds (kicking, raking, treating with anything else) starts a defensive budding response that creates new colonies. Be patient. Most mounds will be inactive or visibly reduced by day 10.

After 10 days, walk the yard. Any mound still active gets a follow-up direct treatment: a granular acephate or a mound drench with a fast-acting pyrethroid. Granular into the top of the mound + a gallon of water poured over to drive it down kills the queen in stubborn mounds. This is the second half of the two-step — bait first, then mound treatment for survivors.

Fire-ant populations rebuild from neighboring yards and from queens flying in on mating flights every year. The maintenance plan is twice-yearly bait broadcast: late March/April and late September/October. Two 30-minute applications a year keep the population at near-zero. Skip a year and you're back to mid-summer mound-by-mound treatment.

Fire-ant baits are formulated to attract ants, not bees — but pyrethroids in mound drenches DO kill bees. Apply mound drenches in early morning or after sunset when bees aren't foraging, and avoid spraying directly on flowering plants. The bait broadcast itself is safe for bees because the granules go to the ground, not the flowers.

If someone disturbs a mound and ants swarm, get away first — fire ants chase 10–15 feet. Brush ants off skin with a gloved hand (don't try to wash them off; they grip skin with mandibles before stinging). For stings: cold pack, antihistamine, hydrocortisone cream. Watch for allergic reaction (hives away from sting site, trouble breathing, swelling of face/throat — that's an EpiPen + 911 call). Then treat the disturbed mound with a drench within 24 hours before it rebuilds.

Fire-ant queens fly half a mile to a few miles on mating flights. If your neighbor has untreated mounds, you'll get new colonies every fall. Treating just your yard works but is harder than coordinating with the block — even three neighbors broadcasting bait on the same weekend cuts the community population by 80%+ within a season. The economics are obvious: bait is cheap, area effect matters.

Set a recurring February calendar reminder: 'Buy fire-ant bait; broadcast first weekend the temperature hits 70°F'. That's the early-spring application that catches queens before they make new mounds. Set a second one for September. Two reminders + two 30-minute applications = a fire-ant-free yard year-round. The whole protocol becomes routine after the first year.