Which application method uses a liquid solution to control pests?

The method that utilizes a liquid solution to control pests is aerosols. Aerosol applications typically involve dispersing a pesticide in a fine mist, allowing the active ingredients to reach pests more effectively when they come into contact with it. This method is particularly useful for treating large areas or hard-to-reach spaces, providing thorough coverage and targeting pests that may be hiding in crevices or on surfaces.

The other methods mentioned, such as granules, dust, and baits, utilize different forms of application. Granules are solid, pellet-like products that require moisture to activate and are often spread on the ground, where they dissolve and release the active ingredient. Dust is another solid form that contains pesticide in a dry form and is typically applied to surfaces, where it remains until disturbed by pests. Baits contain attractants mixed with poison, designed to lure pests to consume the pesticide, but do not involve a liquid solution.