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Curtail M


Curtail™ M herbicide provides excellent in-crop systemic action that kills roots of Canada thistle and other perennial weeds like sow thistle and dandelion in cereals, flax, and canary seed.


Active ingredient:  Group 4 (clopyralid + MCPA ester)
Rainfast:  4 hours
Treatment rate:  One case treats 20-27 acres
Application:  Low rate of 0.6 L/ac. controls small weeds and lighter broadleaf weed infestations, high rate of 0.8 L/ac. controls larger weeds and heavier infestations
Crop staging:  Wheat – 3-leaf to flag leaf, flax – 5 cm to 15 cm in height

Registered Crops

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

Weeds controlled

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

Weed Control Challenge

Cereal yield and quality losses from Canada thistle

Canada thistle and sow thistle deliver aggressive in-crop problems 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 perennial 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 with effective systemic activity of two active ingredients that get right down to the root
  • Compatible with most graminicides to provide excellent weed control including tank mixes with Signal, Axial® Xtreme, Simplicity™ and many others
  • Broad spectrum activity on many hard-to-control broadleaf weeds including pigweed and volunteer canola
  • Best option for hard-to-kill weeds in flax


  • The best above- and below-ground systemic Canada thistle control
  • Makes harvest easier
  • Delivers in-crop yield protection

Supported grass tank-mix partners

Wheat and barley

  • Assert
  • Axial*
  • Axial and Axial Xtreme
  • Broadband*+
  • Cordon/Puma
  • Nufarm Tralkoxydim

Wheat only

  • Altitude FX2 (ClearField wheat)
  • Everest + AgSurf*
  • Signal
  • Simplicity+
  • Traxos
  • Varro*+


  • Poast
  • Select/Centurion


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