Wettable powders when mixed with water....

• A. Disperse without agitation
• B. Require agitation
• C. Suspend without agitation
• D. Melt upon contact

Answer: (B)

Wettable powders are finely ground pesticides that do not dissolve in water; they form a suspension of solid particles. When you mix them, keeping the solution in motion is essential because the particles will settle out if the mixture sits still. Continuous agitation prevents settling, ensures the active ingredient stays evenly distributed, and helps break up clumps that could clog spray nozzles or cause uneven application.

If there’s no agitation, the powder quickly settles to the bottom, leading to inconsistent coverage and potential nozzle plugging. These powders don’t melt on contact with water, either—their behavior is to remain as suspended solids that need a mechanical stir or spray- tank agitator to stay uniformly dispersed.