10 Best Fire Ant Killing 2026 in the United States

The Ortho Fire Ant Killer Broadcast Granules are designed to protect lawns from fire ants by targeting fly-in queens to prevent new mounds from forming. The granule formulation is easy to apply using a spreader and requires watering in, which fits well for homeowners looking for a straightforward lawn treatment. One of its biggest benefits is fast action—killing mounds within 15 minutes—and providing up to 6 months of protection across a large area (5,000 sq. ft.) with just one 11.5 lb. bag.

This product works best as part of a two-step system where an initial mound treatment (using a different Ortho product) is recommended to destroy existing colonies. This means it might not be the sole solution if you already have many active fire ant mounds. The granule form is generally safer for outdoor use around pets and children compared to liquid sprays, but it's always important to follow label instructions closely for safety. If you want a long-lasting, easy-to-use broadcast treatment that keeps fire ants at bay after initial mound control, this is a solid choice. Just keep in mind it won’t replace direct mound treatment for existing infestations.

The Ortho Orthene Fire Ant Killer1 is designed to effectively target and eliminate fire ants, particularly by killing the queen and destroying the mound. It contains Acephate as its active ingredient, which is known for its potency against fire ants. The product comes in granule form, making it easy to sprinkle directly onto mounds without the need for additional watering, which simplifies the application process.

This fire ant killer begins working within 60 minutes, providing quick results and allowing users to enjoy their outdoor spaces sooner. Each pack includes two 12 oz. bottles, capable of treating up to 162 mounds, making it a cost-effective solution for large infestations. However, it's important to note that while the product is effective outdoors around lawns, ornamental plants, and trees, users should exercise caution regarding its safety for pets and children, as the active ingredient, Acephate, can be toxic if ingested or improperly handled.

Additionally, for optimum results, it is recommended to use this product in conjunction with Ortho Fire Ant Killer Broadcast Granules, which are sold separately. This might be seen as a drawback for those looking for a one-step solution.

The Ortho Fire Ant Killer Mound Treatment is a robust option for tackling fire ant infestations in residential lawns, ornamental plants, and flower gardens. Its key strength lies in its rapid effectiveness, killing fire ant mounds and the queen within 15 minutes and preventing new mounds from forming. This makes it quite reliable for immediate and long-term control of fire ants. The product is applied by spreading 2/3 cup of the granular formulation on and around the mound, followed by drenching the area with 2 gallons of water, which ensures thorough treatment of the colony.

Application conditions are specific, requiring temperatures between 65°F to 80°F or during times when ants are most active, which can be early morning or late evening. This may limit its usability during certain times of the year or day. Safety is always a concern with pest control products, and while there is no explicit mention of its safety for pets and children in the provided details, it's always prudent to exercise caution and follow all instructions carefully. The product comes in a 3 lb. bag, which should be sufficient for multiple treatments.

If you are in need of an effective and fast-acting fire ant killer and are able to follow the specific application guidelines, this product could be a good choice for you.