Pre-Harvest Interval Calculator

Find out how many days you need to leave between pesticide application and cutting.

The Pre-Harvest Interval is the minimum number of days that must pass between product application and cutting your crop by swathing or straight-cutting. On farm chemical labels, you’ll see it referred to as the Pre-harvest Interval or PHI. Cutting before this interval has lapsed can leave unacceptable residues on harvested seed.

Use 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.

Use 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.

Don’t see a registered product that you are looking for, or notice an error in the calculator? Please let us know! Contact info@keepitclean.ca.

When tank mixing, each tank mix partner is applied in accordance with its registered product label. In cases where information on the tank mix partner labels differs between them, the most restrictive directions must be followed.

Select a Crop Type

Canola Chickpeas Lentils Faba Beans Dry Beans Peas

Already sprayed? Calculate how long to wait.

Filter By:  Product Active Ingredient

Active Ingredient:

I sprayed my crop with:

 

 

Any products not found in the drop-down menus aren’t currently registered for your selected crop type, and should not be considered for use. Please contact info@keepitclean.ca if you notice any errors or omissions.

Pre-seed/pre-emerge products and early season post-emerge products that do not have PHI information, or whose PHI is constrained by application timing are not included in this calculator.

OR

Have a deadline? Find a pesticide to suit your timeline.

I'm spraying: Insecticide Fungicide Desiccant Herbicide

I want to swath my crop in

days

Any products not found in the drop-down menus aren’t currently registered for your selected crop type, and should not be considered for use. Please contact info@keepitclean.ca if you notice any errors or omissions.

Pre-seed/pre-emerge products and early season post-emerge products that do not have PHI information, or whose PHI is constrained by application timing are not included in this calculator.

Sync Your Calendar

What I'm spraying:

When I'm spraying:

If you are using Outlook or an iPhone you can download PHI End Date ICS file to sync with your calendar.