What two criteria determine whether a field is considered treated?

A field is considered treated primarily based on the time since application of the pesticide and the area that has been subjected to the treatment. This means that if a sufficient amount of time has passed since the pesticide was applied, the residues may have degraded to a level where the field is no longer viewed as actively treated. Additionally, the extent of the area treated is crucial because a specific zone may retain pesticide effects longer than an adjacent area that was not treated or has been more thoroughly washed or absorbed.

Understanding these two criteria is vital for assessing compliance with safety regulations, effectiveness of pest control strategies, and potential harm to non-target organisms in the environment. Recognizing these factors ensures that agricultural practices align with regulations regarding when a field can be considered safe for activities such as harvesting, grazing, or replanting.