What device helps in the automated field mixing of pesticides?

The device that assists in the automated field mixing of pesticides is the eductor. An eductor is a type of mixing equipment that utilizes fluid dynamics to draw in and mix various components, including pesticides and water, efficiently. The operational principle behind an eductor involves creating a vacuum that pulls the pesticide into the mixing chamber as the water or carrier fluid flows through it. This method ensures a thorough mixing process, which is essential for achieving the desired efficacy of pesticides in the field.

In contrast, other options do not serve the specific purpose of automated mixing. Drift control additives are designed to reduce the drift of pesticide sprays, ensuring that the pesticides hit their intended target, while dry flowables refer to a form of pesticide formulation, not a device. An emergency exemption pertains to regulatory provisions allowing the use of unregistered pesticides under specific circumstances, which is unrelated to the mixing processes. Each of these options plays a distinct role in pesticide application but does not fulfill the function of an eductor in facilitating automated mixing.