What four factors should be measured for proper calibration in pesticide application?

The correct response highlights four essential factors for proper calibration in pesticide application: swath width, travel speed, tank capacity, and sprayer output.

Swath width refers to the width of the area that the sprayer can cover in one pass; this is crucial for determining how effectively the pesticide will distribute over the intended area without overlap or gaps. Travel speed is the rate at which the sprayer moves; different speeds can affect the amount of pesticide applied per unit area and can influence droplet size and distribution. Tank capacity is important to understand how much pesticide can be carried, which impacts the efficiency and duration of the application before needing a refill. Finally, sprayer output, which is the volume of pesticide sprayed per unit of time, is vital for ensuring the application rates adhere to recommended guidelines for effective pest control while also minimizing waste and potential harm.

While other factors like chemical concentration, environmental conditions, and user experience are certainly relevant in the broader context of pesticide application, they do not specifically address the calibration process, which focuses on ensuring that the application equipment is set up to deliver the right dosage effectively across the intended area.