Ants are the number one pest complaint from Arizona homeowners — and for good reason. The state is home to more than 300 ant species, and several of them are aggressive household invaders. Fire ants build mounds in yards and deliver painful, burning stings. Carpenter ants excavate wood to build their nests, causing structural damage that can be mistaken for termite activity. Odorous house ants form massive colonies that can number in the hundreds of thousands. Argentine ants are invasive, form supercolonies, and are nearly impossible to eliminate with store-bought products. Identifying the species is the critical first step — because the treatment that works for one species may be completely ineffective for another.

The most common mistake homeowners make is spraying the ants they see. Forager ants represent only about 10% of the colony. Killing foragers with a contact spray does nothing to the queen or the thousands of workers and eggs back at the nest. Within days, the colony sends out new foragers and the problem continues. The most effective approach is bait — slow-acting insecticides that worker ants carry back to the colony and share with the queen and larvae. Different species prefer different bait formulations (protein-based vs. sugar-based), which is another reason species identification matters. For carpenter ants, treatment must also address the nest location inside wood.

Preventing ants starts with eliminating what attracts them: food crumbs, standing water, and easy entry points. Seal cracks around doors, windows, and utility penetrations. Keep tree branches trimmed away from the roofline. Store food in airtight containers. Fix leaky pipes and eliminate moisture under sinks. If you have a persistent ant problem despite these measures, professional treatment is the most reliable solution. Pest Control Bros provides targeted ant control across Maricopa, Chandler, Casa Grande, Tempe, Gilbert, and Mesa — free inspections, no contracts, and treatments that target the colony.