What is the composition of a pesticide dust?

Pesticide dusts are characterized primarily by their finely ground and dry formulation, which allows for effective application. The correct choice emphasizes that these dusts contain a small amount of active ingredient—in essence, the component that drives the pest control effectiveness—while the majority of the composition is made up of an inert carrier. This inert carrier serves important roles, including helping to deliver the active ingredient effectively and facilitating its application across surfaces where pests may inhabit.

In this context, the choice reflects the operational definition of pesticide dusts, where the balance of constituents is key for optimal performance during use. A large amount of active ingredient would not only be impractical in terms of formulation but would potentially lead to environmental and safety concerns. The other options related to liquid formulations or mixtures of solvents are distinctly different from the formulation of dust, further establishing why the detailed characteristics of dust need to be well understood for effective pest management practices.