What is a pesticide's REI (Restricted Entry Interval)?

A pesticide's REI, or Restricted Entry Interval, is a specified time period after pesticide application during which workers should not enter the treated area. This interval is established to protect workers from potential exposure to harmful pesticide residues that may still be present in the environment. The REI varies depending on the type of pesticide used and the risks associated with its exposure. By adhering to the REI guidelines, it ensures that workers are not at risk of inhaling, touching, or ingesting any pesticide that may cause health hazards.

The other options provided focus on different aspects of pesticide use but do not accurately define the REI. For instance, a designated time for applying pesticides relates more to application timing rather than post-application safety. The mention of the amount of time a pesticide remains active in the soil, while relevant, does not pertain to worker safety during the restricted period. Lastly, a time frame for safely re-entering for post-application maintenance could imply a need for safety but is not an official definition of the REI, which is specifically designed to protect workers from immediate risks associated with pesticide exposure.