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Fierce® herbicide provides extended grass and broadleaf weed control for herbicide-tolerant soybeans, and wheat crops with two active ingredients (Group 14 and 15) to help manage resistance weeds.


Active ingredients:  Group 14 (flumioxazin), Group 15 (pyroxasulfone) 

Treatment rate:  One case treats 128 acres at 85 g/ac.(32 ac./jug)
Application timing: Fall apply as late as possible but prior to freeze up for any registered crop, pre-plant or pre-emergent for soybeans, should be applied a minimum of  7 days prior to seeding field corn and spring wheat, apply up to 3 days after seeding soybeans
Tank-mix order: Fierce, BlackHawk or GoldWing ( if used), glyphosate
Notes:  Seeding after application requires the use of minimum to zero till drills, requires moisture to activate in the soil and provides up to 8 weeks extended control

Registered crops

  • Soybeans
  • Spring wheat (not including durum) 
  • Field corn

Weeds controlled

  • Chickweed
  • Dandelion
  • Green foxtail
  • Green and redroot pigweed (including Group 2 and Group 5 resistant biotypes)
  • Kochia (Group 2, 4 and 9 resistant)
  • Lamb’s quarters (including Group 2 and triazine resistant)
  • Wild buckwheat
  • Wild mustard
  • Volunteer canola (suppression)

Weed Control Challenge

Remember when glyphosate or other non-residual herbicides were all it took to control your wild oats and most broadleaf weeds? Unfortunately, herbicide-resistant weeds mean that Groups 1, 2, 4 ,5 and 9 can’t handle the problems alone anymore. Maximizing soybean and wheat yields depend on residual control of tough grass and broadleaf weeds.

Nufarm Solution

Fierce herbicide delivers broad-spectrum, extended residual weed control. Pyroxasulfone is registered for suppression of wild oats and control of various foxtail and brome species at a rate consistent with the upper registered range of Fierce. This provides another option to reduce the effect of Group 1 and 2 resistant  grassy weeds, and other broadleaf weeds that impact yield and harvest management. Fierce controls resistant weeds before they become a problem.


  • Better performance than other leading residual herbicides on tough broadleaf weeds
  • Grassy weed management for cleaner fields with a different mode of action
  • Longer control with residual activity that lasts up to 8 weeks
  • Two active ingredients (proven Group 14 and new Group 15)  for management of Group 1,2,4,5 and glyphosate-resistant weeds 


  • Convenient application eliminates the need for granular broadcast herbicide products
  • Tank mixable with most burndown and pre-emergent herbicides (i.e. glyphosate, BlackHawk and GoldWing)


  1. Emerged weeds – use with a burndown herbicide partner like glyphosate, BlackHawk and /or GoldWing
  2. Flushing weeds – residual activity for newly emerging weeds
  3. Emerged crop – Fierce alone can be used up to 3 days post seeding of soybeans
  4. Refer to label or crop guide for rates and use patterns
  5. DO NOT incorporate after application or prior to seeding
  6. Pre-seeding applications require the use of minimum disturbance seeding systems
  7. Non-ionic surfactant required if glyphosate is not being tank mixed
  8. Leave a small checkstrip in the field to show performance