What defines a dust in pesticide formulations?

A dust in pesticide formulations is characterized by its low percentage of active ingredient mixed with a fine carrier. This formulation type typically has particles that are small enough to remain suspended in the air when applied, allowing for uniform distribution over surfaces. The fine carrier aids in the effective adhesion and spread of the pesticide across the target area.

In contrast, other formulations mentioned involve different characteristics. High percentage active ingredients on coarse carriers are more akin to granules or bait formulations, which differ significantly in application and effectiveness. Liquid formulations that can be aerosolized relate to sprays or mists, lacking the particulate nature of a dust. Granules that do not dissolve in water may also contain a higher concentration of active ingredient but do not fit the operational definition of a dust. Thus, a dust is specifically characterized by its low active ingredient concentration combined with a fine carrier, enabling specific application methods and results.