How to Control Fire Ants in Texas: Professional vs DIY

Published: 2025-04-01

Texas has the highest fire ant infestation density of any US state. The red imported fire ant (Solenopsis invicta) has colonized all 254 Texas counties and causes an estimated $1.2 billion in annual damage — from agricultural losses to medical costs to HVAC equipment damage. If you have fire ants, you're not alone. The question is how to control them effectively.

Why Over-the-Counter Products Fail

Most consumer fire ant products — broadcast granules, individual mound drenches — kill the forager ants you see but fail to reach the queen deep in the nest. A fire ant colony has one or more queens producing up to 1,500 eggs per day. Without eliminating the queen, the colony recovers within weeks.

The Two-Step Method: What Professionals Use

The extension-service recommended approach combines broadcast bait treatment (slow-acting toxicant carried back to the queen) with individual mound treatment for immediate knockdown of problem mounds. The broadcast bait reduces overall colony density by 80–90% when applied correctly in favorable conditions.

Temperature and Timing Matter

Fire ant bait must be applied when ants are actively foraging — soil temperature between 60°F and 95°F. Applying bait during summer afternoon heat or cold weather results in ants ignoring the product. Early morning and evening applications in spring and fall yield the best results.

Commercial vs Residential Treatment

Fire ant colonies in playgrounds, athletic fields, and around HVAC equipment require more aggressive treatment programs. Commercial facilities should maintain quarterly service contracts to keep mound counts below 1 per 3,000 square feet.

Frequently Asked Questions