The Imported Red Fire Ant (Solenopsis invicta) is reddish-brown with darker abdomen and typically measures ⅛–¼ inch (polymorphic). The imported red fire ant (Solenopsis invicta) is an invasive species from South America that has spread across the southern United States and is now established in parts of Arizona. It is considered.

Yes — the Imported Red Fire Ant is considered a high-risk pest. Extremely aggressive; multiple simultaneous stings. Venom causes intense pain, pustules, and risk of anaphylaxis. Documented human fatalities in allergic individuals. Serious threat to livestock, wildlife, and ground-nesting birds.

In Arizona, imported red fire ants are most often encountered in the following situations: Dome-shaped mounds of loose, fluffy soil — no visible central opening. Ants swarm instantly and sting repeatedly when mound is touched. White pustules at sting sites within 24 hours.

The Imported Red Fire Ant is most active during: Year-round; most active in spring and fall. 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.

Report new infestations to Arizona Department of Agriculture. Treat mounds immediately. Inspect nursery plants and soil before bringing onto property. Participate in community-wide bait programs.

Two-step broadcast bait program followed by individual mound treatments. Professional service strongly recommended. Repeat treatments required for polygyne colonies.

Most store-bought ant sprays kill only the workers you see, while the queen and colony remain protected underground. Effective Imported Red Fire 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.