Lontrel XC


Rely on Lontrel™ XC herbicide for fail-safe control of Canada thistle and multiple other broadleaf weeds in field corn and other crops.


Lontrel™ XC Herbicide is a liquid concentrate to be diluted in water and applied for control of yield-robbing broadleaf weeds. It is effective on a range of crops including canola, sugar beets, rutabagas, summerfallow, flax, spring wheat, spring barley, oats and many others. 


Lontrel XC herbicide is readily absorbed by both foliage and roots, allowing it to move throughout the plant for superior control. Use it against Canada thistle, wild buckwheat, scentless chamomile, common groundsel and volunteer alfalfa. It suppresses growth of perennial sowthistle through control of top growth.

Ask an Agrologist

Lontrel XC herbicide now in Eastern Canada

Join us to hear about Lontrel XC as a new solution in corn.
File format not supported. Unable to play audio. Please refresh your browser and try again.


Lontrel™ XC is a high-performing, selective herbicide you can rely on to knock down target weeds

Why use Lontrel XC?


This Group 4 herbicide provides superior control against tough broadleaf weeds such as Canada thistle and sow thistle by moving througout the entire plant system. The following year after a Lontrel application, thistle stands are shown to be reduced by 73%.

Reliable protection

Lontrel has an all-new XC formulation to give plants unmatched protection in even the toughest and most challenging conditions.


For use in areas requiring lower impact applications..


You choose the rate to match the size and scope of your thistle issues. Customized rates allow for complete control of target weeds while being safe for grass and other non-target vegetation.


Below lists the crops that Lontrel XC herbicide can be used on:



Beet, Sugar (Beta vulgaris ssp. vulgaris)

Sugar Beet (Beta Vulgaris L.)



Corn, Field (Zea mays ssp. mays)


Rutabaga (Brassica napus var. napobrassica)


Wheat, Durum (Triticum durum)

Wheat, Spring Seeded (Triticum aestivum)

Wheat, winter


  • Registered
  • Unregistered

Technical Specifications

  • Application Method

    Field sprayer application Do not apply during periods of dead calm. Avoid application of this product when winds are gusty. Do not apply with spray droplets smaller than the American Society of Agricultural Engineers (ASAE) medium classification.  Boom height must be 60 cm or less above the crop or ground. Do not apply by air.
    To reduce spray drift, use nozzles that deliver higher volumes and coarser droplets. Use low pressures (200 to 275 kPa). Use 100 to 200 L/ha of spray solution. Spray when the wind velocity is 15 km/h or less.

  • Packaging

    Each case of Lontrel XC herbicide contains 4 x 2.67 L jugs.

  • Approved Use
    Refer to the Lontrel XC label for complete use instructions.
    Refer to the Controlled Weeds list for the full list of weeds.
  • Rates

    Lontrel™ XC has a wide range of rates from 69 mL to 202 mL/acre. Use rates vary by crop.
    Field Corn:

    • Apply Lontrel XC alone or in a tank mix with glyphosate. Apply when field corn is at the spike to 8-leaf stage of growth
    • 69 mL/acre: Tank mix with glyphosate for enhanced control of Canada thistle, dandelions, perennial sow-thistle and wild buckwheat.
    • 101 mL/acre: Canada thistle (top growth), vetch and alsike clover

    Cereals (spring wheat, winter wheat, durum wheat, barley):

    • 101 mL/acre: Canada thistle (top growth), vetch and alsike clover
    • 69-101 mL/acre: Tank mix with 2,4-D Ester or Amine, MCPA Ester or Amine for enhanced control of Canada thistle as well as weeds listed on the tank mix label.

    Canola (Ontario only):

    • 101 mL/acre: For top growth control of Canada thistle
    • Make one application per season; post emergent. Apply at the 2-6 leaf stage of canola, when weeds are actively growing. Apply to Canada thistle at the rosette to pre-bud stage.

    Sugar Beets:

    • 138-202 mL/acre: For control of Canada thistle and other labelled broadleaf weeds, apply either broadcast or as a band over the row. When applied in the band, the amount of Lontrel XC herbicide should be reduced proportional to the bandwidth. Lontrel XC herbicide should be applied when sugar beets are in the cotyledon to 8-leaf stage. For the most effective control of Canada thistle, apply Lontrel XC herbicide as a broadcast treatment to the entire infested area. 


    • 138 mL/acre: For control of common ragweed, apply Lontrel XC in approximately 200 to 300 L/ha of water. Apply as a post-emergent spray when ragweed plants are 5 to 10 cm tall. Application to larger ragweed plants will result in reduced weed control. Make only one application per season. 
  • Application Timing

    Treat target weed species in a young, growth life cycle, when the Canada thistle is in the rosette to pre-bud stage but prior to purple bud stage and volunteer alfalfa is 5-50 cm in height.

    • Field corn: spike to 8-leaf
    • Cereal: 3-leaf to flag leaf
    • Canada thistle: rosette to pre-bud

    Apply to target weed species when they are young and actively growing. Only weeds present during application will be controlled.

  • Crop Rotation

    Fields previously treated with Lontrel XC herbicide can be seeded the following year to wheat, oats, barley, rye (not underseeded with legumes, clover or alfalfa), forage grasses, flax, canola, mustard, soybeans*, field peas*, sugar beets or can be summer fallowed.
    *Fields previously treated with Lontrel XC up to 101 ml/acre can be seeded after a minimum of 10 months to soybeans and field peas. Very dry soil conditions following application can result in a risk of injury to soybeans or field peas grown in rotation. If severe drought conditions (less than 38 cm rainfall in the 10 months following application) are experienced in the year of application, delay seeding soybeans and field peas an additional 12 months (total of 22 months following application).
    Do not seed to crops other than those listed above in the calendar year following treatment.

  • Mixing Instructions

    Tank mix by following these steps:       

    1. Fill the spray tank with ½ to ¾ of the required amount of water.
    2. Continue agitation throughout the mixing and spraying procedure.
    3. Add any required water conditioners.
    4. Add any dry formulation tank mix partners.
    5. Add the required amount of grassy weed tank-mix partner.
    6. Add the required amount of Lontrel XC™.
    7. Add any required adjuvant or surfactants.
    8. Complete filling the sprayer tank with water.

    Note: Do not mix undiluted herbicides in the chem-handler.

  • Herbicide Group

    Group 4

  • Tank Mixes

    Lontrel XC herbicide may be safely tank mixed with many other registered herbicides. Refer to the specific crop use recommendations for tank mix guidance.

  • Additional Information


    • The PHI for sugar beets treated with Lontrel XC is 90 days.
    • The PHI for rutabaga is 83 days.
    • The PHI for durum wheat (Eastern Canada) is 60 days.
    • For field corn, do not allow livestock to graze treated areas or harvest treated field corn for silage as feed within 40 days after last treatment.


Labels (PDF)
Lontrel XC Herbicide Label
Herbicide Lontrel XC étiquette principale

Safety Data Sheets (PDF)
Lontrel XC Herbicide SDS
Herbicide Lontrel XC fiche signalétique

View Additional Resource Material (PDF)
West Field Guide
Vegetation Management Guide
Horticulture Crop Protection Guide
Lontrel-XC TechSheet
Guide de gestion de la végétation


Before use and for complete product information, please read and follow label directions.