Which formulation cannot be made into a liquid formulation?

The formulation that cannot be made into a liquid formulation is the extruded block. This type of formulation is typically solid and designed to release its active ingredients slowly over time, often through moisture or conditions in the environment. Since it is a solid block, it cannot be readily dissolved or suspended in a liquid form to create a true liquid pesticide formulation.

In contrast, the other options consist of formulations that can be made into a liquid. Granular pesticides can be mixed with water to form a suspension, flowable microencapsulates can be designed to mix well with liquid, and emulsifiable concentrates are specifically formulated to mix with water to create an emulsion. Each of these formulations allows for the active ingredients to be dispersed or dissolved in a liquid medium, making them suitable for various application methods.