What type of pesticide formulation is described as having an active ingredient impregnated on a diluent like clay?

The description provided in the question refers to a type of pesticide formulation where the active ingredient is mixed with a diluent, such as clay. This aligns with granular formulations, which consist of solid particles that have pesticide active ingredients coated or mixed with an inert material. Granular formulations are designed to be spread over the soil or onto plants, allowing for slow release and targeted delivery of the pesticide. They have advantages such as ease of application, reduced risk of drift, and are often used for pest control in soil and lawn applications.

In contrast, flowable, liquid, and suspension formulations involve different methods of dispersing the active ingredients. Flowable formulations are typically used for solids that need to be suspended in a liquid for application, while liquid formulations are generally solutions where the active ingredient is completely dissolved in a solvent. Suspension formulations contain solid particles suspended in a liquid, which is different from having an active ingredient simply mixed into a diluent like clay. Overall, the correct answer highlights the association of active ingredients with a diluent specifically in a granular form.