Pay Attention to PreHarvest Intervals and Product Registrations

The preharvest interval (PHI) refers to the number of days that the crop should not be harvested after applying a pesticide. Harvest in this context means cutting or swathing. If the crop is harvested before the indicated interval has elapsed, there could be unsafe or unacceptable residues of the pesticide remaining in or on the harvested seeds. Preharvest intervals are listed on the labels of pesticides and under the ‘Restrictions’ section of individual product descriptions in a current provincial Guide to Crop Protection. When pesticide applications are being considered, take note of the required preharvest interval and allow for that time period before harvest. Also, ensure that the product is registered for the intended use and registered to be used on the crop at that stage. Following pre-harvest intervals is critical to keeping all canola Export Ready.