The Pharaoh Ant (Monomorium pharaonis) is pale yellow to light orange with darker abdomen and typically measures 1/16 inch. The pharaoh ant (Monomorium pharaonis) is considered one of the most difficult ant species to control. Workers are tiny — about 1/16 inch — and pale yellow to light orange with a darker abdomen. Colon.

The Pharaoh Ant poses a moderate risk. Can transmit pathogens in healthcare settings. Budding behavior means repellent sprays make infestations worse. Extremely difficult to eliminate without professional treatment. Food contamination.

In Arizona, pharaoh ants are most often encountered in the following situations: Tiny pale yellow ants in trails, especially in kitchens, bathrooms, and near HVAC systems. Nests in wall voids, behind outlets, or under floors. Infestation spreading after use of repellent sprays.

The Pharaoh Ant is most active during: Year-round indoors. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.

Never use repellent sprays — use only slow-acting bait. Seal entry points. Eliminate moisture. Inspect incoming packages and grocery items.

Slow-acting non-repellent bait ONLY — repellent insecticides cause budding and spread the infestation. Multiple bait placements throughout the structure. Professional service strongly recommended.

Most store-bought ant sprays kill only the workers you see, while the queen and colony remain protected underground. Effective Pharaoh Ant control requires baiting or targeted colony treatments that workers carry back to the nest. Pest Control Bros uses professional-grade products and application methods that address the entire colony.