If calibration shows the current spray rate does not match the label rate, what should you do?

• A. Change to a different pesticide with a label rate that matches your current calibration.
• B. Adjust flow or speed to meet the label rate per acre, then re-check calibration.
• C. Stop spraying and hope for best.
• D. Increase operator training only.

Answer: (B)

When you’re calibrating, the goal is to deliver the labeled amount of product per area. If the current spray rate doesn’t match that label rate, you fix it by changing how much chemical is being delivered or how fast you’re moving so that the amount applied per acre equals the label. In practice, you’d adjust flow (through nozzle selection, pump pressure, or other flow control) or adjust travel speed, then re-check calibration to confirm the rate now matches the label. After any adjustment, re-verify with another calibration check to ensure accuracy and compliance.

Avoid changing to a different product just to fit the current calibration, since each product has its own label rate and requirements. Stopping spraying with no plan isn’t appropriate, and merely increasing training without addressing the equipment setup won’t fix the underlying miscalibration.