What does re-entry interval refer to in pesticide use?

• A. The time before daylight after application.
• B. The duration of the chemical's overall effectiveness in the field.
• C. The time allowed before people can re-enter the treated area without protective equipment after application.
• D. The time required to wash PPE.

Answer: (C)

Re-entry interval is the safety waiting period after a pesticide is applied, during which people should not enter the treated area without protective equipment. This time is set on the product label to protect workers from exposure to residues on surfaces or in the air. The option that describes waiting to re-enter without PPE matches this safety window exactly: it’s about when it’s considered safe to return without protective gear, not about daylight, how long the product remains effective, or how long it takes to wash PPE.

Durations for this interval vary by product and use, and it’s essential to check the label for the exact REI for any pesticide you plan to apply. If you must enter during the REI, you should wear the PPE specified on the label.