What is the name of the adjustable device used to deliver high-volume pesticide solutions?

The adjustable device used to deliver high-volume pesticide solutions is referred to as a handgun nozzle. Handgun nozzles are specifically designed to provide a wide range of flow rates and spray patterns, allowing the applicator to adjust the output based on the specific pesticide being used and the area being treated. This flexibility is crucial for effective pest control, as it enables the applicator to cover larger areas efficiently while delivering the pesticide in a manner that is effective for the target pests.

While garden sprayers can also be used for applying pesticides, they are usually more suited for smaller areas and may not provide the same high volume delivery capabilities as a specialized handgun nozzle. Atomizers, on the other hand, are typically used for creating fine droplets for applications such as aerial spraying or misting. Roto nozzles are designed for different applications, often providing a rotating spray pattern for surfaces but may not be efficient for high-volume pesticide solution delivery. Thus, the handgun nozzle is the most appropriate choice for high-volume applications.