Which pest control equipment is designed primarily for dust application?

The hand plunger duster is specifically designed for dust application due to its mechanism and purpose. This tool allows the user to introduce powdered pesticides directly into areas where pests are hiding or breeding, ensuring precise application. The application method involves creating air pressure to push the dust out through a nozzle, which effectively disperses the pesticide powder in a controlled manner.

In contrast, other equipment like hydraulic sprayers and compressed air sprayers are primarily designed for liquid applications. They are optimized for converting liquid pesticides into fine droplets for spraying, which is not suitable for dusts. Mist blowers also focus on creating a mist of liquid formulation in a broad area, rather than delivering dust directly where it is most needed. Thus, the distinct design and intended use of the hand plunger duster make it the correct choice for dust application tasks.