What does the acronym REI stand for in pesticide labeling?

• A. Restricted Entry Interval
• B. Regular Entry Index
• C. Required Entry Impact
• D. Residential Environmental Interaction

Answer: (A)

REI stands for Restricted Entry Interval. It’s the time period after a pesticide is applied during which entry into the treated area is restricted to protect people from exposure. The label sets this interval based on the product’s toxicity and use, and entering during the REI often requires wearing the specified PPE or limiting the type of work being done. Durations can vary from a few hours to several days. The other options aren’t standard pesticide-label terms, so they don’t convey the safety and entry limitations that REI does.