What defines a wettable powder (WP) formulation?

A wettable powder (WP) formulation is defined as a dry product that requires agitation to remain mixed in a liquid solution for application. When a wettable powder is added to water, it does not dissolve completely; instead, it forms a suspension that must be agitated to keep the particles evenly distributed throughout the liquid. This is essential for ensuring uniform application, as settling can occur if the mixture is left undisturbed.

While other formulations, such as soluble powders or liquids, may dissolve completely in water, wettable powders are specifically designed to be mixed thoroughly for optimal performance. The need for agitation is a characteristic feature that distinguishes WPs from other types of pesticide formulations. Additionally, ease of handling and application is a general advantage of many formulations, but it does not define wettable powders specifically. Oil-based formulations typically fall into a different category and are not considered wettable powders.