Which dry formulation requires constant agitation and may be abrasive to pumps and nozzles and wear them out quickly?

• A. Wettable Powders (WP)
• B. Dusts (D)
• C. Granules (Gran)
• D. Pellets (Pel)

Answer: (A)

Wettable powders are finely milled solids that must be dispersed in water to form a sprayable suspension. Because these solids tend to settle quickly, the spray tank needs constant agitation to keep the mixture uniform and to prevent clogging or uneven coverage. The fine particles can also be abrasive to pump components and nozzle interiors, so keeping them in suspension rather than letting them settle minimizes wear and helps protect the equipment. Granules and pellets are coarse and intended for soil or broadcast application rather than spraying as a suspension, and dusts, although dry powders, are not managed in the same way as a suspension and are handled differently in practice. So the dry formulation that best fits both the need for constant agitation and potential abrasion to pumps and nozzles is wettable powders.