Which formulation type is designed to be effective when applied at a very low volume?

The formulation type designed to be effective when applied at a very low volume is the ultra low volume formulation. This type is specifically engineered to deliver a concentrated pesticide solution using minimal amounts of carrier liquid, which often results in very small droplet sizes. The low volume application can enhance coverage and penetrate foliage more effectively, making it suitable for certain pest control scenarios where traditional larger volume applications may be less efficient.

In contrast, other options, such as granular formulations, typically rely on being spread over the surface and need a substantial volume to ensure adequate coverage, thus are not suited for low volume applications. Wettable powders require suspension in water and are usually applied at higher volumes to ensure proper distribution and efficacy. Emulsifiable concentrates also typically require dilution with a larger volume of water for effective application, making them less suited to ultra low volume use.