Entry and Preharvest Intervals


Restricted Entry Intervals (REI) and Preharvest Intervals (PHI)

The restricted entry intervals (REI) and preharvest intervals (PHI) for a given material are listed on the product label. Growers are responsible for carefully reading, understanding, and following these label requirements and restrictions before selecting and applying a product.

  • The same or similar products produced by different manufacturers may not have the same label requirements and restrictions.

  • Different uses (such as for different pests or crops) or rates of the same product may have different intervals.

  • The REI of a product supercedes the PHI of a product. Example: if the REI of a product is 72 hours and the PHI is 48 hours, you must restrict entry prior to harvest for 72 hours after application.

  • When tank mixing products, the most restrictive reentry interval applies.