Which pesticide formulation requires constant agitation in the sprayer tank?

The formulation that requires constant agitation in the sprayer tank is the wettable powder. This is because wettable powders consist of finely ground solid particles that are suspended in water. Over time, these particles tend to settle at the bottom of the tank due to gravity if not kept in suspension.

Constant agitation is essential to ensure a uniform distribution of the pesticide in the tank, providing effective delivery during application. This practice helps prevent clumping or sedimentation, which can lead to uneven application rates and potentially ineffective pest control. Agitation ensures that the sprayed solution remains homogenous, allowing for consistent performance and optimal effectiveness.

Other formulations, like emulsifiable concentrates and oil-soluble, typically mix well with the liquid medium and do not require the same level of continuous agitation to maintain suspension or emulsion. Granular formulations also do not require agitation as they are solid formulations applied directly to the ground and do not need to be mixed in a liquid solution.