Quick Answer #

When applying (almost any product), there should be a detailed PHI (Post Harvest Interval) and an REI (Re-Entry Interval) depending on the product some of the requirements change.

Post Harvest Interval (PHI) #

The preharvest interval (PHI) is the minimum amount of time between the last application of a pesticide and when the crop can be harvested. Harvest is the cutting of the crop or removal of the produce from the plant. The PHI is found on the pesticide label. Complying with a PHI is a legal requirement.

Re-Entry Interval #

A restricted entry interval (REI) or re-entry time is the time after the end of a pesticide application during which entry into the treated area is restricted. This time allows residues to disperse and not pose a risk.

Aquatic Natural Farming Pesticides #

For the products that I teach farmers how to make or cultivate on-site, the PHIs are listed as “until dry,” which means that the plants can be harvested, packaged, and sold to the customer as soon as they are dry. The customer’s instructions would be to wash before eating, though if they didn’t, they wouldn’t die (assuming you are using safe products).

Store-bought Pesticides #

For other store-bought products, they may have specific washing procedures that need to be followed and I would refer to label instructions or contact the manufacturer.