Return to Canola Council Home
Every crop protection product has its own pre-harvest interval (PHI) — which is the time required between spraying and cutting the crop. PHI is also often different for the same product used on different crops.
The quick and simple calculator at spraytoswath.ca helps you find a canola fungicide, insecticide or pre-harvest herbicide that fits your timeframe.
If a canola crop will be ready to swath within three weeks, for example, and diamondback moth larvae are above thresholds, then the grower needs a product with a pre-harvest interval of 21 days or less. With the calculator, the user can select the estimated number of days until swathing or straight combining, and the tool provides all the products available to use within that window.