REI stands for Restricted Entry Interval; what does this term signify on pesticide labels?

• A. Restricted Entry Interval
• B. Regular Environmental Index
• C. Residual Entry Indicator
• D. Required Entry Interval

Answer: (B)

REI stands for Restricted Entry Interval. It is the period after a pesticide is applied during which entry into the treated area is restricted to protect workers from exposure. The label will specify how long the interval lasts and what precautions are required if entry is allowed during that time (often including the need to wear specific protective gear). Once the interval has expired, entry is permitted under the label’s normal conditions, unless another restriction applies. This term is not Regular Environmental Index, Residual Entry Indicator, or Required Entry Interval.