What is a bulb duster used for?

A bulb duster is specifically designed for distributing powdered pesticides. Its design typically features a bulb that creates airflow when squeezed, allowing for a controlled release of dust into targeted areas. This application is particularly useful in situations where granular or powdered formulations are preferred, enabling precise placement of the pesticide without excessive waste or drift.

The other options do not accurately represent the primary function of a bulb duster. For instance, it is not used for mixing chemicals, as that involves different tools and methods that ensure proper blending of substances. Additionally, while a bulb duster may apply some pressure when dispensing, it is not fundamentally a device meant for spraying liquids; that is typically the role of a spray nozzle or a pressurized sprayer. Lastly, a bulb duster is not utilized for measuring liquid pesticides, which is the function of measuring devices like graduated cylinders or measuring cups, specifically designed for liquids. Thus, the focus of a bulb duster is on effective application of powdered products directly where needed.