Keep your surroundings free of fire ants with the Bengal UltraDust 2X fire ant Killer. The 12 oz can treats 75 fire ant mounds and the 24 oz can treats 150 mounds. To ensure a fire ant-free environment, it kills the entire mound and ants overnight on contact, including the queen. The advanced, unique formula has a residual action that will continue to kill insects for up to 8 months to help prevent future infestations. It's faster acting than ant bait products, won't clump or absorb moisture and will continue to work even in dewy environments or rain. It can also be used on roses and ornamental plants. For additional protection, use it as a perimeter treatment to help prevent fire ant invasions in buildings and structures. This product contains a 0.1% concentration of its active ingredient, Deltamethrin, one of the most powerful insecticides available.