What type of formulation is best for porous surfaces like concrete to control ants?

A wettable powder formulation is particularly effective on porous surfaces like concrete for controlling ants because it can adhere better to uneven textures and can be mixed with water to create a solution that allows for even distribution across the surface. Once applied, the fine particles remain in the small pores and crevices of concrete, increasing the likelihood of contact with ants as they traverse the treated area.

This type of formulation also allows for deeper penetration into the porous material, helping in targeting not only the ants present on the surface but potentially those that may be nesting within or near the treated area. Wettable powders can also offer longer residual activity compared to liquid formulations, making them advantageous in managing persistent ant issues.

Liquid formulations, while effective in many situations, may not retain on porous surfaces as well, leading to a quicker loss of efficacy. Granular formulations can be useful as well, but they might not adhere as effectively to vertical or uneven surfaces and may require the ants to actively forage onto the granules for them to be effective. Emulsions are often used for broader pest control, but on porous surfaces, they might not provide the same depth of penetration or adherence necessary for optimal ant control.