Which statement correctly defines the re-entry interval (REI)?

• A. REI is the time after treatment when workers are restricted from entering.
• B. REI is the pre-harvest interval before harvest.
• C. REI stands for Residue Enforcement Indicator.
• D. REI is the time before treatment.

Answer: (A)

Re-entry interval is the period after a pesticide has been applied during which entry by workers is restricted or limited to reduce exposure. This safety window is specified on the product label and depends on factors like the formulation, rate, and application method. It’s about protecting people who must enter treated areas, not about harvest timing. The pre-harvest interval, not REI, tells you when it’s safe to harvest produce after application. The other descriptions either refer to entering before treatment or use terms that aren’t standard, so they don’t describe what REI means.