Growers can protect their crop marketing options and keep markets open for everyone by following the label at all points in the season. Applying crop protection products or desiccants without following label directions may result in unacceptable residue levels that exceed established maximum reside limits (MRLs).

Following the label includes:

  • Using a product only on the crops it is registered for.
  • Correctly timing the application.
  • Strictly adhering to the pre-harvest interval (PHI).

Also known as the spray to swath interval, the PHI outlines the number of days that must pass between the application of any crop protection product and cutting the crop by either swathing or straight-cutting to avoid leaving unacceptable residue levels on harvested seed. Because residue breakdown occurs in the plant only, not in the seed, storage time after cutting the crop will not decrease residue levels.

The closer the field is to cutting, the more limited the choices for pesticides based on the PHI. To help time applications, canola growers can visit, an interactive interval tracking tool. Growers can enter the product they sprayed to see how many days they must wait to cut after application, or, they can enter a planned cutting date to find a product that is still safe to apply. can also sync with the calendar on a grower’s smartphone, so they always have this reference available in the field.

Click here for more information about following the pre-harvest interval.