Wettable powders mixed with water require which action?

• A. No mixing required
• B. Agitation
• C. Heating
• D. Centrifugation

Answer: (B)

Wettable powders are finely ground pesticides that must be dispersed as a stable suspension in water. Without agitation, the particles quickly settle and can clump, causing uneven coverage and possible nozzle clogging. Agitation physically breaks up lumps and keeps the particles evenly distributed throughout the spray tank, ensuring you get a uniform mix during application. Heating isn’t needed and can damage the product, and centrifugation isn’t a practical method for field mixing since it’s used to separate solids from liquids, not to keep them dispersed. So, constant or adequate mechanical agitation is required to properly mix wettable powders.