Curtail M


Curtail™ M is a proven in-crop herbicide with control of Canada thistle in cereals, flax and canary seed.

Technical Information

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 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 – 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)
  • Lamb’s-quarters
  • Redroot pigweed
  • Scentless chamomile
  • Shepherd’s-purse
  • Sow thistle (annual, perennial)
  • Stinkweed
  • Volunteer canola
  • Volunteer sunflower
  • Wild mustard


  • GETS TO THE ROOT OF THE PROBLEM with effective systemic activity of two active ingredients that get down to the roots
  • COMPATIBLE with most graminicides to provide excellent weed control including tank-mixes with Signal®, Axial® Xtreme, Simplicityand many others
  • BROAD-SPECTRUM activity on many hard-to-control broadleaf weeds including pigweed and volunteer canola
  • BEST OPTION for flax crops with hard-to-kill weeds
  • The best above and below ground systemic thistle control
  • Makes harvest easier
  • Delivers in-crop yield protection


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

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

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.

Tough Weeds in Cereal Crops

Tank-Mix Partners


  • Axial and Axial Xtreme
  • Broadband*
  • Cordon/Puma
  • Epic
  • Nufarm Tralkoxydim


  • Altitude FX2 (Clearfield® wheat)
  • Signal
  • Everest*
  • Simplicity
  • Traxos
  • Varro*


  • Poast
  • Select/Centurion
  • Statue

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


For specific crop usage information see label for details