The Cheap Ant-Killing Bait That Even Takes Out the Queen

Eliminating an ant infestation at its source without expensive pest control.

Use a slow-acting borax sugar bait: mix 1 part borax with about 10 parts sugar, then add enough warm water to make a syrup. Worker ants carry it back to the nest, share it by feeding, and can poison larvae and the queen over several days. It is cheap, usually costs far less per treatment than commercial bait stations, and works best on sugar-feeding household ants when placed directly on active trails.

The key is concentration. Too much borax kills workers before they return to the colony, which means the queen may survive. A low-dose bait is slower, but that is the point.

1 teaspoon borax 10 teaspoons sugar Enough warm water to dissolve into a thin syrup

Soak cotton balls, bottle caps, or small pieces of cardboard with the bait. Place them along ant trails, near entry points, behind appliances, under sinks, or wherever ants are actively feeding.

Do not spray the ants first. Contact sprays kill visible workers but can stop them from carrying bait back to the nest. For colony control, bait needs live foragers.

Expect visible ant activity to increase at first. That is normal because the bait is attracting workers. Activity often drops after several days, but large colonies or multiple nests may need repeated baiting for one to two weeks.

Best for sugar-feeding indoor ants, small household infestations, kitchens, bathrooms, windowsills, baseboards, and trails where ants are actively foraging.

If ants ignore the sugar bait, switch the attractant. Some ants prefer protein or fat at certain times of year. Try a small amount of peanut butter or canned pet food mixed with a tiny amount of borax, but keep the toxicant low so workers survive long enough to share it.

Keep bait moist. Ants are less likely to feed on dried-out syrup. Replace bait every 24 to 48 hours, or sooner if it becomes dusty, crusted, contaminated with food debris, or empty.

Use many small bait placements rather than one large puddle. Several pea-sized or bottle-cap portions along active trails usually work better than a single dish in the middle of the room.

Do not place bait on food-prep surfaces. Use sealed bait holders where possible, such as a jar lid, a piece of foil with raised edges, or a commercial refillable bait station.

Borax is not the same as boric acid, but both are boron compounds used in ant baits. Borax is commonly sold as laundry booster and is usually inexpensive. It should still be treated as a pesticide when used this way.

Store borax and mixed bait away from children, pets, food, dishes, and animal feed. Label any container clearly. Never use food containers for long-term storage of bait.

Do not over-clean the trail before baiting. Ants follow pheromone trails, and removing them too early can reduce bait discovery. After activity stops, clean the area with soap and water to remove remaining scent trails.

Seal entry points after the colony declines, not before. Caulk gaps around pipes, windows, baseboards, and exterior cracks once feeding activity has dropped. Sealing too early may scatter the trail and make baiting harder.

Remove competing food. Wipe syrup, crumbs, fruit juice, pet food residue, and grease from surfaces. Store sugar, cereal, flour, and pet food in sealed containers.

The value advantage is simple: a small box of borax and table sugar can make many bait refills, while disposable bait stations are convenient but cost more per placement. Homemade bait also lets you adjust the attractant if ants reject one food type.

The risk is misapplication. Strong mixes, open puddles, and bait placed where pets can reach it are common mistakes. Low-dose, contained, repeated baiting is safer and more effective than trying to poison every visible ant at once.

Bottom line: cheap borax sugar bait can kill more than the ants you see because workers carry it back to the colony.

The Result