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Weed Control Challenge

Cereal yield and quality losses from Canada thistle
Canada thistle and sow thistle deliver up aggressive in-crop problems as the number one perennial weed for many growers. Capable of producing 14 shoots per square metre, and a root system that extends for 20 feet, Canada thistle can reduce cereal yields by up to 38%* and significantly affect crop quality.
*Manitoba Agriculture Food & Rural Initiatives – 2013

Nufarm Solution

Best Control targeted to take out Canada thistle
Curtail™ M provides the best in-crop, systemic action with trusted Group 4 chemistry to kill the roots of Canada thistle and other troublesome perrenial weeds such as sow thistle and dandelion. With two active ingredients, Curtail M translocates deep down to the extensive thistle roots for effective above- and below-ground control.


  • Gets to the root of the problem. Effective systemic activity of two active ingredients gets right down to the roots
  • Compatible. Complete weed control based on compatibility with most graminicides exceptional weed control when mixed with Signal, Axial® Xtreme, Simplicity™ and many others
  • Not just for thistle. Broad-spectrum activity on many hard-to-control broadleaf weeds including pigweed and volunteer canola
  • Flax. Number 1 option for hard-to-kill weeds in flax


  • The best above- and below-ground systemix thistle control
  • Makes harvest easier
  • Delivers in-crop yield protection
  • Active Ingredient: 
    • Group 4 (clopyralid + MCPA ester)
  • Rainfast:
    • 4 hour
  • Treatment area: 
    • One case treats 20-27 acres
  • Application:
    • Low rate of 0.6 L/ac. controls small weeds and lighter infestations
    • High rate of 0.8 L/ac. controls larger weeds and heavier infestations
  • Crop staging:
    • Wheat: 3-leaf – just before flag leaf
    • Flax: 5 cm to 15 cm in height

Registered Crops

  • Spring wheat
    (including durum)
  • Barley
  • Flax
  • Canary seed
  • Oats
  • Timothy

Weeds controlled

  • Buckwheat (wild, tartary)
  • Canada thistle
  • Dandelion (top growth)
  • Lamb’s-quarters
  • Redroot pigweed
  • Scentless chamomile
  • Shepherd’s-purse
  • Stinkweed
  • Sow thistle (annual, perennial)
  • Volunteer canola
  • Volunteer sunflower
  • Wild mustard

Supported grass tank-mix partners

Wheat and barley
  • Assert
  • Nufarm tralkoxydim
  • Axial*
  • Axial and Axial Xtreme
  • Broadband*+
  • Cordon/Puma
Wheat only
  • Altitude FX2 (ClearField wheat)
  • Signal
  • Everest + AgSurf*
  • Simplicity+
  • Traxos
  • Varro*+
  • Poast
  • Select/Centurion

*not including durum
+600 mL/ac. rate of Curtail M