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

The correct answer describes a type of pesticide formulation known as a granular formulation. In this type of formulation, the active ingredient is impregnated onto a solid diluent, such as clay, resulting in small granules. This format allows for slow release of the active ingredient over time and makes it easier to apply the pesticide to soil or target areas without excessive drift or volatility that might occur with liquid formulations.

Granular formulations are particularly useful for pests that reside in the soil or for applications that require a longer residual effect. They can also facilitate targeted delivery, as the granules can be spread over a designated area where they will release the active ingredient gradually as needed.

Flowable formulations refer to pesticides that are in a liquid state but have a higher viscosity than standard liquids, requiring special equipment for application. Liquid formulations typically consist of pesticides mixed with solvents and are more immediate in effect. Suspension formulations involve the active ingredient suspended in liquid but are not the same as impregnated granules.

Understanding these distinctions helps in choosing the appropriate formulation for different pest control scenarios.