What is specified by Restricted-Entry Intervals (REI) on pesticide labels?

Restricted-Entry Intervals (REI) on pesticide labels indicate the time required before unprotected workers can safely reenter areas that have been treated with pesticides. This interval is crucial for ensuring the safety of individuals who may be exposed to residues from the pesticide application.

The REI is established based on the toxicity of the pesticide and the potential risk it poses to human health after application. During this interval, workers are advised to stay out of the treated area to minimize their exposure to harmful chemicals. This helps prevent health issues that could arise from inhalation or skin contact with the pesticide residues.

The other options pertain to different aspects of pesticide usage but do not directly relate to the concept of REI. Application rates concern how much pesticide should be used on various crops, equipment requirements relate to what must be used to apply the pesticide safely, and weather conditions refer to the environmental factors that can affect pesticide application but do not address the safety of workers post-application.