What is the term for a dry pesticide formulation that forms a suspension when added to water?

The term for a dry pesticide formulation that forms a suspension when mixed with water is known as wettable powder. Wettable powders are formulated as fine particles that can disperse in water to create a suspension. This allows for an even distribution of the pesticide in the spray solution, ensuring effective application.

When added to water, wettable powders do not dissolve; instead, they remain suspended, which is beneficial for providing consistent coverage on surfaces being treated. Wettable powders are commonly used due to their effectiveness and ability to remain stable in suspension for a certain period, which aids in the application process.

In contrast, an aqueous solution refers to a solution where the pesticide completely dissolves in water, creating a homogenous liquid. Emulsions are typically a mixture of two immiscible liquids, such as oil and water, where one is dispersed in the other with the aid of an emulsifier. Granules are larger particles that do not form a suspension in water; they are intended for soil application or specific types of treatments where they dissolve over time. Thus, the characteristics of wettable powders make them distinct and the correct answer in this scenario.