Which of the following is a disadvantage of wettable powders?

Wettable powders are a type of pesticide formulation that, when mixed with water, form a suspension. One significant disadvantage of using wettable powders is that they can become airborne dust during the mixing process. This poses an inhalation hazard for the operator preparing the solution. Inhalation of pesticide particles can lead to respiratory issues and other health problems, making it essential for operators to use appropriate personal protective equipment, such as masks or respirators, to minimize their exposure.

While wettable powders have several advantages, such as being relatively stable and effective over a long period, it is crucial to recognize the potential health risks associated with their use. The other options present characteristics of wettable powders that can be misleading; for instance, they require careful handling and proper mixing to ensure effectiveness and minimize hazards, contradicting the notion of ease and safety in mixing.