CONQUER® II herbicide is an all-in-one pre-seed burndown solution with two active ingredients and two modes of action for use with glyphosate prior to canola.

Technical information

Active ingredients:  Group 14 (pyraflufen), Group 6 (bromoxynil)
Rainfast:  6 hours
Treatment rate:  121 mL/acre, One case (2 x 9.7 L) treats 160 acres, one drum (77.7 L) treats 640 acres
Tank-mix order:  CONQUER II, glyphosate
Notes:  Canola can be seeded immediately after application. For best results, spray in the heat of the day when the weeds are actively growing. Use adequate water volumes for good coverage of target weeds.

Registered crops

Can be applied pre-seeding or post-seeding  prior to crop emergence for the following crops:

  • Canola
  • Wheat (spring, durum, winter)
  • Barley
  • Canary seed
  • Fall rye
  • Oats 
  • Triticale
  • Corn
  • Summerfallow

Weeds controlled with a glyphosate tank-mix

  • Annual sow thistle (suppression)
  • Cleavers (including Group 2- and glyphosate-resistant biotypes)
  • Cow cockle (suppression)
  • Dandelion (spring germinated)
  • Flixweed 
  • Kochia (including Group 2-, 4- and glyphosate-resistant biotypes)
  • Lamb’s quarters (including Group 2- and 5- resistant biotypes)
  • Narrow-leaved hawk’s beard (suppression)
  • Night flowering catchfly
  • Pineapple weed (suppression)
  • Redroot pigweed (including Group 2- and 5- resistant biotypes)
  • Shepherd’s purse 
  • Stinkweed
  • Volunteer canola (all biotypes)*
  • Wild buckwheat
  • Wild mustard

Check the glyphosate label for additional weeds and rate recommendations.

For best results apply to emerged, young, actively growing weeds that are less than 5 cm tall or across. Thorough coverage of target weeds is essential.

* Use up to 242 mL/acre of CONQUER II herbicide if the volunteer canola is beyond the 3 leaf stage.

Weed control challenge

The growing range of weed control challenges in canola

Glyphosate has been used for years for effective burndown. But with the widespread adoption of glyphosate-tolerant crops like canola and the spread of Group 2-. 4, and glyphosate-resistant weeds like kochia and cleavers, growers are now faced with more weed control challenges than ever. Products with a single active ingredient have too narrow a spectrum to control the growing range of weed populations.

Nufarm solution

Complete weed control that’s safe on canola

CONQUER II delivers faster, more complete weed control as a pre-seed burndown ahead of canola compared to glyphosate alone. With two active ingredients and two separate modes of action, and when tank-mixed with glyphosate, weeds face a triple action threat. This all-in-one formulation controls hard-to-kill weeds including kochia, cleavers, and volunteer canola.


  • FAST BURNDOWN compared to bromoxynil alone
  • EXCELLENT WEED CONTROL including all Group 2 and glyphosate-tolerant biotypes of volunteer canola, kochia and cleavers
  • NON RESIDUAL ACTIVITY eliminates any risk to the emerging canola crop
  • The best burndown product available for use before seeding canola
  • Protects long-term viability of agronomic tools such as glyphosate and glyphosate-tolerant traits
  • No surfactant required when used with glyphosate

Performance tips

CONQUER II is a contact herbicide and must be applied directly on growing weeds for effective results.

  • Droplet size – use a combination of nozzle type and sprayer speed to achieve a fine to medium droplet size, adjust sprayer speed to optimize weed coverage
  • Water volume – use 10 gal./ac. water volume for adequate coverage on weeds

Herbicide layering