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Weed Control Challenge

Growing weed resistance, especially to glyphosate
Glyphosate alone used to provide an effective burndown option in cereal crops. But the widespread adoption of glyphosate-tolerant canola, and the alarming spread of glyphosateand Group 2-resistant kochia, has dramatically reduced the effectiveness of glyphosate-only control programs.

Nufarm Solution

Two modes of action for excellent weed control
BlackHawk® contains a new Group 14 active (pyraflufen-ethyl) in a pre-formulation with 2,4-D ester. BlackHawk delivers faster, more complete weed control in a cereal pre‑seed burndown than glyphosate and Group 2 herbicides. With two active ingredients and two modes of action, BlackHawk is an innovative burndown solution that doubles as an effective tool for resistance management.


  • Resistance Management. Proven resistance management – BlackHawk
    includes two non-Group 2 modes of action to target broadleaved weed species
  • Fast. Faster control through systemic and contact activity
  • Enhanced control. More complete performance than glyphosate


  • A superior tank mix with glyphosate that provides better burndown
    results than glyphosate alone
  • Makes in-crop weed control easier and more effective by having only new,
    small weeds present at time of application
  • Provides broad-spectrum weed control, including excellent control
    of narrow-leaved hawk’s-beard
  • Pre-seed burndown applications are known to increase crop yield by up to 25%*
  • Effective fall weed control
  • No surfactant needed when applied with glypohosate.New Group 14 active
  • Active ingredients:
    • Group 14 (pyraflufen-ethyl) + Group 4 (2,4-D)
    • Group 4 (2,4-D ester)
  • Rainfast: 
    • 1 hour
  • Treatment area: 
    • One case treats 60 acres – at standard rate of 300 mL per acre
    • One drum treats 320 acres at standard rate
  • Tank-mix order:
    • BlackHawk
    • glyphosate
  • Notes:
    • Cereals can be seeded immediately following application (except oats)
    • Can be applied up to 3 days after seeding soybeans (ensure soybeans are seeded minimum 1 inch depth)
    • Coverage of emerged weeds is key for contact activity

Registered crops


• Barley
• Canary seed
• Field corn
• Oats (apply 7 days prior
to seeding)
• Rye (spring, fall)
• Soybeans (apply a maximum
of 3 days after planting)
• Summerfallow
• Triticale
• Wheat (spring, winter, durum)


Weeds controlled

• Cleavers (all confirmed herbicideresistant
• Cocklebur
• Cow cockle (suppression)
• Dandelion (spring seedling and
season long suppression)
• Flixweed
• Kochia (including Group 2 and
glyphosate-resistant biotypes)
• Lamb’s-quarters (including Group 2-
and 5- resistant biotypes)
• Mallow
• Mustards
• Narrow-leaved hawk’s-beard
(including Group 2-resistant
• Night-flowering catchfly
• Pigweed (redroot and Russian)
• Prickly lettuce
• Russian thistle
• Shepherd’s-purse
• Stinkweed
• Sweet clover
• Volunteer canola (including all
herbicide-resistant biotypes)
• Wild buckwheat (suppression)
• Wild radish

for enhanced control of these additional weeds

• Canada thistle
• Chickweed
• Dandelion
• Sow thistle
• Volunteer canola (all biotypes)
• Wild buckwheat

Performance Tips

• Coverage of emerged weeds is key for contact activity
* Yield benefit is obtained through early elimination of crop competition. Up to 7 bu./ac. when tank mixed with glyphosate at burndown – results from trials across five states, comparing yields in fields using glyphosate burndown versus a Valtera + glyphosate burndown.