Follow the Label to Protect Your Investment
Before you apply any crop protection product, read the label to find the application rate, timing and pre-harvest interval (PHI).
Improper or off-label use of pesticides is illegal, may result in unacceptable residues and put market access at risk.
Always follow the correct application rate.
MRLs are established based on the product label’s application rate. Following the label’s application rate and maximum number of applications per year reduces the risk of unacceptable residues in the harvested grain.
Apply crop protection products only at the recommended crop stage.
For example, glyphosate for pre-harvest weed control should only be applied once grain moisture is less than 30% in the least mature areas of the field. Applications made too early increase the risk of unacceptable residue in the grain.
Tip: Refer to the Pre-Harvest Glyphosate Staging Guide for visual examples of various crops at 30% grain moisture.
Stick to the product’s pre-harvest interval (PHI) – the number of days between spraying and swathing or straight-cutting the crop.
PHIs can vary greatly between products – from as little as none (zero PHI) to up to 60 days. PHIs are set to ensure a product’s active ingredient has enough time to break down in the plant and not leave unacceptable residues behind.
Tip: To help time applications, canola and pulse growers can use the Spray to Swath Interval Calculator
If you require clarification about information found on the label, or have further questions, contact the manufacturer before proceeding. Following the label is just one of the 5 Simple Tips. By taking steps to Keep it Clean throughout the growing season, you can protect the marketability of your crop and help keep markets open for all.
Meeting Harvest Goals
While working to meet harvest goals, it is crucial to stick to the PHI, even if your crop is facing a late- season threat as cutting approaches.
As fields get closer to cutting, pesticide choices become more limited, based on the PHI. To help time applications or choose an acceptable product, canola and pulse growers can use the Keep it Clean Spray to Swath Interval Calculator, an interactive interval tracking tool.
Using the tool to calculate PHI: Enter the crop type and the product you have sprayed, and the calculator will tell you how many days after application you must wait to cut your crop.
Using the tool to find a product to suit a specific timeline: Enter your crop type and pesticide type, then drag the slider to indicate when you would like to cut the crop. The calculator will tell you which (if any) products can be applied to meet that timeline.
Tip: The Spray to Swath Interval Calculator can sync with the calendar on your smartphone.