If a label lists PHI, what information does it provide?

• A. The maximum pesticide limit per acre
• B. The minimum time between application and harvest
• C. The minimum reentry interval
• D. The required PPE

Answer: (B)

PHI stands for Pre-Harvest Interval. It tells you the minimum amount of time that must pass between the last pesticide application and harvest to ensure pesticide residues are within safe limits. This waiting period is specific to the pesticide and crop, and is usually listed in days on the label. It’s not about how much pesticide you can apply per acre, nor about when workers can re-enter the treated area, nor about the PPE required. Those other label items are separate requirements. So, when a label lists PHI, it’s guiding you on the required wait time before harvesting.