Which type of formulation is considered non-water soluble and requires spray equipment?

A suspension formulation is considered non-water soluble and requires spray equipment. This type of formulation consists of finely divided solid particles that are dispersed in a liquid. Because the particles do not dissolve, they remain suspended in the liquid and can settle over time. This characteristic necessitates the use of spray equipment capable of agitating the mixture to ensure a uniform application.

Spray equipment is essential for suspensions to properly deliver the active ingredient onto the target area, as the particles need to be kept in suspension during the spray process. If not properly mixed, the solid particles could settle and lead to uneven distribution, diminishing the effectiveness of the herbicide.

In contrast, solutions contain solutes that are dissolved in a solvent, typically allowing for homogeneous mixing without the need for constant agitation. Emulsions consist of two immiscible liquids, like oil and water, yet can often be prepared as stable mixtures. Concentrates refer to formulations that contain a higher concentration of the active ingredient and may or may not be water soluble, but they do not specifically indicate a need for spray equipment.

Understanding the differences among these formulations is critical for herbicide applicators to select the appropriate equipment and techniques for effective weed control.