6 Best Insecticide For Ants In Lawn | Don’t Just Treat, Eliminate

Check Price on Amazon

One 20-pound bag treats up to 25,000 square feet and wipes out ants, grubs, and ticks in a single pass.

If your lawn has more than just ants — maybe grubs killing the roots or mole crickets tearing through the St. Augustine — this 20-pound bag covers everything at once. It kills insects above and below ground and treats up to 25,000 square feet, so a single bag handles a large suburban yard without a second trip to the store. This 20-pound bag offers serious coverage; the Sevin bag below is 10 pounds.

Buyers report it works “for several years” and that it is simple to use: set your spreader, dispense the granules, and water them in. One reviewer in warm South Florida noted it provides about three months of protection per application and that it is safe for St. Augustine grass. The active ingredient is a concentrated bifenthrin formula that starts killing on contact, so you see dead ants within hours, not days.

Keep in mind that this is a broad-spectrum killer. It is excellent for a comprehensive lawn pest reset, but if you only have ants and want to spare the beneficial insects, a bait like the Advion below is more targeted.

Check Price on Amazon

It kills ants by contact, and owners mention gnats and mosquitoes vanish the next day — ticks and fleas too.

This 20-pound bag covers 20,000 square feet and kills ants, ticks, armyworms, sod webworms, fleas, and spiders. It works fast — one reviewer noted “the day after applying, the swarms of gnats and mosquitos were gone.” The formula kills by contact above and below the ground, then leaves a barrier that keeps bugs from marching inside your home. It is designed to work with standard broadcast spreaders like Scotts Drop or SpeedyGreen, so you do not need special equipment.

Unlike the liquid concentrate from Liquid Harvest, which requires mixing and a sprayer, Ortho BugClear is a true set-and-forget granular treatment. You pour it into your spreader, walk the yard, and water it in. One Florida buyer noted it “spreads very easily” and has been using it for years to keep the bugs away. It also works well as a mole deterrent — reviewers report that eliminating the grubs and insects in the soil starves the moles, driving them away naturally.

A minor trade-off: some long-term users in Texas noticed fleas returning after a year of use, possibly due to resistance or a formula change. Rotating with a different active ingredient every season is a smart move.

Check Price on Amazon

A 10-pound bag stops over 30 pests including ants and ticks — customers note the protection lasts a full year.

Sevin has been a household name in lawn pest control for decades, and this 10-pound bag keeps the reputation strong. It kills over 30 listed pests including ants, ticks, fleas, and worms, and it works on lawns, ornamentals, and even around vegetable gardens. One buyer mentioned that treated areas stayed pest-free for “at least a year” after application, which is impressive for its price tier. Another reviewer praised it for eliminating fleas in the yard entirely, noting that you should water it in right after spreading.

The key difference between this and the heavier bags above is scale. At 10 pounds, Sevin is a better fit for smaller to mid-sized lawns. If you try to cover a 20,000 sq. ft. yard with this, you will need two bags and still come up short compared to a single 20-pound bag of BioAdvanced. Buyers also caution not to over-apply, as too much can damage plants.

Check Price on Amazon

The bait you place on mounds, and ants carry 0.22% indoxacarb back to kill the queen in about one week.

If you are battling fire ants or persistent pavement ants that survive contact sprays, this is the product that ends the bloodline. Advion uses 0.22% indoxacarb, a non-repellent active ingredient with a “MetaActive effect” — it only activates inside the target insect after ingestion, so it does not spook the colony. Workers carry the bait back to the nest, feed the queen, and the whole colony collapses. One owner reported that “ants swarm bait immediately” and were “gone in ~2 days.” A fire ant reviewer noted the colony died in about one week.

Unlike the granules from Ortho or BioAdvanced, which kill on contact in a broadcast pattern, Advion is a targeted bait. You shake it directly onto mounds or along perimeter lines. That makes it far more efficient for spot treatments — you are not wasting expensive product on grass that has no ants. A professional pest control technician who reviewed the product confirmed it “works on all types of ants” indoors and outdoors and is great for seasonal ground beetles too.

The catch is speed. Contact killers show dead ants within hours; Advion takes two days to a week because the poison must travel through the colony. But when it works, it eliminates the nest permanently rather than just the surface workers.

Check Price on Amazon

Professional-grade granules that last two to four months without needing to be watered in.

Talstar is a brand you see in professional pest control trucks, and this PL Granule version brings that longevity to your home lawn. It uses a sand core granular structure that resists breakdown, providing a two to four month residual — the manufacturer claims the longest residual of any granule available. It penetrates mulch and grass on contact, and notably, it does not require watering in, unlike most other granules here that need a hose-down after spreading.

One buyer confirmed that ants were eliminated after two weeks, and that using granules for large areas paired with a liquid spray (1 oz. per gallon) for borders and cracks created a complete defense. The slow-acting poison in the granules spreads through the nest as ants track it back underground. That same reviewer noted the liquid application needs reapplication every three months, but the granules hold longer. Another buyer called it “awesome” and said they use it every year to keep ants away all season.

The one downside from a buyer: if you have a “severe infestation,” they recommend professional treatment first, then use Talstar as maintenance. Also, dead lizards that ate poisoned insects were found, so be aware of the food chain effect if you have small reptiles in your yard.

Check Price on Amazon

Mix 7.9% bifenthrin with water to make gallons of spray that hits over 75 pests and dries clear.

This 32-ounce bottle of 7.9% bifenthrin is a different beast from the granular bags above. It is a liquid concentrate that you mix with water in a pump sprayer. A small amount goes a long way — one customer observed they “use very little of the product to mix in with the water” and got “amazing results.” It targets over 75 different pests including ants, fleas, ticks, spiders, scorpions, mosquitoes, roaches, and wasps. It can also be used as a mound drench to kill fire ant colonies directly.

The formula is water-based, so it dries clear, leaves no visible residue, and is odor-free. You can spray it on lawns, around window frames, along baseboards indoors, and even on interior plantscapes. Another buyer called it a “no-brainer” and recommended rotating with other insecticides to prevent resistance.

The trade-off vs granules is effort. You need a sprayer, you need to mix the right dilution from the label, and you need to reapply roughly every three months.