What kind of devices range from backpack types to larger units often combined with mist blowers?

The correct answer is related to devices used for applying pesticides, particularly those that are designed to disperse powders or dry formulations over a wide area. Dusters are indeed versatile tools in this context, ranging from smaller, portable backpack models ideal for applying granular formulations or dusts in smaller areas, to larger, more robust units that may be used alongside mist blowers for increased efficiency and coverage.

Dusters can offer various benefits, such as the ability to reach difficult or elevated areas and providing a targeted application that minimizes drift and off-target exposure. These devices are particularly useful in agricultural settings or in pest control practices where precision is crucial.

While foggers and hydraulic sprayers are also used in pest management, they primarily deal with liquid formulations rather than powders or granular materials. Granular blowers focus specifically on the application of granular products, which does not encompass the wider variety of uses that dusters offer. This specificity of dusters makes them particularly important in the context of applying dry formulations effectively.