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Pre-harvest Glyphosate Staging Guide for Cereals

Use this handy staging guide to determine when grain moisture is less than 30% in Cereal crops.

What to Look for

By applying pre-harvest glyphosate at 50-60% seed colour change in the least mature areas of the field, growers can be confident grain moisture will be <30% At this stage, seeds in the main stem will be:

  • Top = green, firm to roll
  • Middle = mostly brown, with some speckling
  • Bottom = completely brown/black

All Cereals

Use the thumbnail test to determine if a kernel is ready for pre-harvest glyphosate application. This test method applies to all Cereal types.


Barley (Malt, Food and Feed)

What to Look For:

At less than 30% grain moisture, the kernel is firm and reasonable pressure from your thumbnail leaves a dent (i.e. hard dough stage).

Recommended Harvest:

7–14 days after pre-harvest glyphosate application.

Do Not Use:

Malt barley WILL NOT be accepted by grain buyers if treated with pre-harvest glyphosate.

Be Informed:

Barley MAY NOT be accepted if treated with pre-harvest glyphosate – check with your grain buyer before applying. Strictly follow the product label guidelines to minimize scrutiny in the global market place.


Oats

What to Look For:

At <30% grain moisture, the kernel is firm and reasonable pressure from your thumbnail leaves a dent (i.e. hard dough stage).

Recommended Harvest:

7–14 days after pre-harvest glyphosate application.

Be Informed:

Oats MAY NOT be accepted if treated with pre-harvest glyphosate – check with your grain buyer before applying. Strictly follow the product label guidelines to minimize scrutiny in the global market place.


Wheat

What to Look For:

At less than 30% grain moisture, the kernel is firm and reasonable pressure from your thumbnail leaves a dent (i.e. hard dough stage). Be mindful of any regrowth and late tillering, especially with seed production, as this can impact the grain moisture assessment.

Recommended Harvest:

7–14 days after pre-harvest glyphosate application.

Be Informed:

Wheat MAY NOT be accepted if treated with pre-harvest glyphosate – check with your grain buyer before applying. Strictly follow the product label guidelines to minimize scrutiny in the global market place.

We’re all in
this together.

Do your part to protect the quality and reputation of Canadian crops and help keep markets open for all.

Follow the Keep it Clean 5 Simple Tips to ensure your canola, cereals and pulses are ready for market.