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Assert® herbicide controls early flushes of wild oats and volunteer canola in wheat and barley. It is the only Group 2 wild oat herbicide registered for barley.


Active ingredients:  Group 2 (imazamethabenz)
Rainfast:  4 hours
Treatment rates:  Cereals – one case treats 32 – 40 acres, sunflowers – one case treats 64 acres/case
Crop staging:  1 – 6 leaf stage of wheat/barley crop  

Registered crops

  • Barley
  • Wheat (durum, spring)
  • Sunflowers

Weeds controlled**

  • Wild oats – 1-3 leaf stage
  • Buckwheat (wild, tartary) – suppression
  • Stinkweed – up to 6 leaf stage
  • Volunteer canola (except Clearfield® varieties) – up to 4 leaf stage
  • Wild mustard – up to 6 leaf stage

**Based on 40 acres/case rate.



  1. Apply Assert early from the 1-6 leaf stage of crops for highest yield
  2. Use Assert as a crop-safe alternative in wheat and barley
  3. Rotate chemical groups for resistance management

Weed Control Challenge

You’ve seen it before, you’re waiting for your crop to come up in the spring…and an early flush of weeds appear before or at the same time as the crop. That early weed competition will put a big dent in your crop yield. Wild oats that are a leaf stage ahead of the crop can rob up to 30%* of crop yield. And volunteer canola that comes in early and thick adds even more competition for young cereal crops.

*O’Donovan et al.  1985 and Sapsford et al. 2008.

Nufarm Solution

Assert® delivers effective and affordable early control of wild oats and volunteer canola in wheat and barley. Assert offers the only Group 2 chemistry that can be safely sprayed early in both crops. *O’Donovan et al. 1985 and Sapsford et al. 2008.

Get the Assert advantage

  • Flexible and wide range of tank-mix options for broader weed control
  • Wide window of application (1-6 leaf stage) in wheat and barley
  • The only Group 2 product (imazamethabenz) registered to control wild oats in barley
  • Removes wild oats competition early for maximum yield benefit
  • Excellent crop safety