Herbicide Recommendations for Corn: Soil Applied and Early Postemergence Tank-Mixes (For Control of Grass and Broadleaf Weeds)


Pub 75: Guide to Weed Control > Corn > Herbicide Recommendations for Corn: Soil Applied and Early Postemergence Tank-Mixes (For Control of Grass and Broadleaf Weeds)

Excerpt from 2010-11 Chapter 9, Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Dual II Magnum + Banvel II or Oracle)
  2. Dual II Magnum (+ Banvel II or Oracle + atrazine)
  3. Dual II Magnum + Callisto + Aatrex Liquid
  4. Dual II Magnum + Marksman or Propero
  5. Converge Flexx + atrazine
  6. Frontier Max + atrazine
  7. Frontier Max + Banvel II
  8. Frontier Max + Marksman
  9. Primextra II Magnum + Callisto
  10. Primextra II Magnum + Banvel II or Oracle
  11. Prowl 400
  12. Prowl 400 + atrazine
  13. Prowl 400 + Banvel II or Oracle
  14. Prowl 400 + Marksman
  15. Corn Herbicide Weed Control Ratings (Table 9-1) (PDF file - 214kb)
  16. Corn Leaf Stages
  17. Why is Early Season Weed Control so Important in Corn?
  18. Related Links

Dual II Magnum + Banvel II or Oracle
Trade Name
+ Banvel II or Oracle
Active Ingredient
s-metolachlor/benoxacor
+ dicamba
Formulation
915 g/L
480 g/L*
Rate per hectare (active)
1.14 to 1.6 kg/ha
0.6 kg/ha
Rate per hectare (product)
1.25 to 1.75 L/ha
1.25 L/ha
Rate per acre (product)
0.5 to 0.7 L/ac
0.5 L/ac

* Numerous products exist, refer to Table 4-1, Herbicides Used in Ontario, for a complete list of available products.

Precautions

  • Do NOT use on seed corn or sweet corn.
  • Apply pre or post up to the 3 leaf stage of field corn.
  • Uuse higher rates of Dual II Magnum on heavy grass infestations and for fall panicum. Fall panicum may not be controlled all season.
  • Grassy weeds beyond the 2 leaf stage will not be controlled.
  • See precautions for Banvell II or Oracle alone.
  • Do NOT apply to coarse (sand) textured soils with less than 2% organic matter.

Dual II Magnum + Banvel II or Oracle + atrazine
Trade Name
Dual II Magnum
 + Banvel or Oracle
+ atrazine
Active Ingredient
s-metolachlor/benoxacor
+ dicamba
+ atrazube
Formulation
915 g/L
480 g/L
480 g/L*
Rate per hectare (active)
1.14 to 1.6 kg/ha
0.6 kg/ha
1.01 to 1.49 kg/ha
Rate per hectare (product)
1.25 to 1.75 L/ha
1.25 L/ha
2.1 to 3.1 L/ha
Rate per acre (product)
0.5 to 0.7 L/ac
0.5 L/ac
0.84 to 1.24 L/ac

*Numerous products exist, refer to Table 4-1, Herbicides Used in Ontario, for a complete list of available products.

Precautions

  • Do NOT use on seed corn or sweet corn.
  • Apply PRE or POST up to the 3 leaf stage of field corn.
  • Use higher rates of Dual II Magnum on heavy grass infestations and for fall panicum. Fall panicum may not be controlled all season.
  • Grassy weeds beyond the 2 leaf stage will not be controlled.
  • See precautions for Banvell II or Oracle alone.
  • Do NOT apply to coarse (sand) textured soils with less than 2% organic matter.
Dual II Magnum + Callisto + Aatrex Liquid
Trade Name
Dual II Magnum
 + Callisto
+ Aatrex Liquid
Active Ingredient
s-metolachlor/benoxacor
+ mesotrione
+ atrazube
Formulation
915 g/L
480 g/L
480 g/L
Rate per hectare (active)
1.14 to 1.60 kg/ha
0.140 kg/ha
1.0 to 1.49 kg/ha
Rate per hectare (product)
1.25 to 1.75 L/ha
0.3 L/ha
2.1 to 3.1 L/ha
Rate per acre (product)
0.5 to 0.7 L/ac
0.12 L/ac
0.85 to 1.25 L/ac
Precautions
  • Apply PRE to field, seed and sweet corn.
  • Apply PRE or POST up to the 3 leaf stage of field corn only.
  • Use high rates for heavy grass infestations.
  • Grassy weeds beyond the 2 leaf stage will not be controlled.
  • Do NOT apply to corn treated with an organophosphorous insecticide.

    •  

    Dual II Magnum + Marksman or Propero
    Trade Name
    Dual II Magnum
    		 + Marksman or Propero
    Active Ingredient
    s-metolachlor/benoxacor
    + dicamba/atrazine
    Formulation
    915 g/L
    393 g/L
    Rate per hectare (active)
    1.14 to 1.60 kg/ha
    1.48 to 1.8 kg/ha
    Rate per hectare (product)
    1.25 to 1.75 L/ha
    3.7 to 4.5 L/ha
    Rate per acre (product)
    0.5 to 0.7 L/ac
    1.5 to 1.8 L/ac

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • Use high rates for heavy grass infestations and for fall panicum. Fall panicum may not be controlled all season.
    • Grassy weeds beyond the 2 leaf stage will not be controlled.
    • See precautions fro Banvel II alone.
    • Do NOT apply to coarse (sand) textured soils with less than 2% organic matter.
    Converge Flexx + atrazine
    Trade Name
    Converge Flexx
    		 + atrazine
    Active Ingredient
    isoxaflutole
    + atrazine
    Formulation
    480 g/L
    480 g/L
    Rate per hectare (active)
    79 to 105 kg/ha
    + 0.8 to 1.063 kg/ha
    Rate per hectare (product)
    330 to 440 mL/ha
    + 1.6 to 2.21 L/ha
    Rate per acre (product)
    132 to 174 mL/ac
    + 0.67 to 0.88 L/ac

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • Do NOT incorporate treatments prior to planting.
    • Use the higher application rates for control of fall panicum and proso millet.
    • Do NOT use Converge Flexx on sands, loamy sand and/or soils with less than 2% organic matter.
    Frontier Max + atrazine
    Trade Name
    Frontier Max
    		 + atrazine
    Active Ingredient
    dimethenamid
    + atrazine
    Formulation
    720 g/L
    480 g/L*
    Rate per hectare (active)
    544 to 693 g/ha
    + 1 to 1.53 kg/ha
    Rate per hectare (product)
    756 to 963 mL/ha
    2.08 to 3.19 L/ha
    Rate per acre (product)
    302 to 385 mL/ac
    + 0.832 to 1.28 L/ac

    *See Table 4-1. Herbicides Used in Ontario for formulations available. See label for specific uses and rates.

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Use the higher rate of Frontier Max for heavier weed populations. Control of non-emerged triazine resistant weeds will be limited to pigweed.
    • Grassy weeds beyond the 2 leaf stage will not be controlled.
    • Can be tank-mixed with glyphosate or Gramoxone for PP burndown of emerged annual and perennial weeds, see Chapter 6, Preplant & Postharvest Weed Control, for more information.
    • Apply PREPLANT, PPI, PRE or POST up to the 3 leaf stage of corn.
    • If using Frontier (900 g/L) apply at a rate of 0.44 to 0.56 L/ac.
    Frontier Max + Banvel II
    Trade Name
    Frontier Max
    		 + Banvel II
    Active Ingredient
    dimethenamid
    + dicamba
    Formulation
    720 g/L
    480 g/L*
    Rate per hectare (active)
    544 to 693 g/ha
    + 0.6 kg/ha
    Rate per hectare (product)
    756 to 963 mL/ha
    1.25 L/ha
    Rate per acre (product)
    302 to 385 mL/ac
    + 0.5 L/ac

    Precautions

    • Do NOT use on seed corn popcorn or sweet corn.
    • Apply PREPLANT, PRE or POST up to the 3 leaf stage of field corn.
    • Use the higher rate of Frontier Max for heavier weed populations. For improved burndown control, the addition of glyphosate may be required.
    • Grassy weeds beyond the 2 leaf stage will not be controlled.
    • See precautions for Banvel II applied alone.
    • If using Frontier (900 g/L) apply at a rate of 0.44 to 0.56 L/ac.
    Frontier Max + Marksman
    Trade Name
    Frontier Max
    		 + Marksman
    Active Ingredient
    dimethenamid
    + dicamba/atrazine
    Formulation
    720 g/L
    393 g/L*
    Rate per hectare (active)
    544 to 693 g/ha
    1.8 kg/ha
    Rate per hectare (product)
    756 to 963 mL/ha
    4.5 L/ha
    Rate per acre (product)
    302 to 385 mL/ac
    1.8 L/ac

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PREPLANT, PRE or POST up to the 3 leaf stage of field corn.
    • Use the higher rate of Frontier Max for heavier weed populations. For improved burndown control, adding glyphosate may be required.
    • Grassy weeds beyond the 2 leaf stage will not be controlled.
    • See precautions for Banvel II or Oracle applied alone.
    • If using Frontier (900 g/L) apply at a rate of 0.44 to 0.56 L/ac.
    Primextra II Magnum + Callisto
    Trade Name
    Primextra II Magnum
    		 + Callisto
    Active Ingredient
    s-metolachlor/benoxacor/atrazine
    + mesotrione
    Formulation
    (1:0.8) 720 g/L
    480 g/L
    Rate per hectare (active)
    2.16 to 2.88 kg/ha
    0.140 kg/ha
    Rate per hectare (product)
    3 to 4 L/ha
    0.3 L/ha
    Rate per acre (product)
    1.2 to 1.6 L/ac
    0.12 L/ac

    Precautions

    • Apply PRE to seed and sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • Use high rates for heavy grass infestations.
    • Grassy weeds beyond the 2 leaf stage will not be controlled.
    • Do NOT apply to corn treated with an organophosphorous insecticide.
    Primextra II Magnum + Banvel II or Oracle
    Trade Name
    Primextra II Magnum
    		 + Banvel II or Oracle
    Active Ingredient
    s-metolachlor/benoxacor/atrazine
    + ducanba
    Formulation
    (1:0.8) 720 g/L
    480 g/L
    Rate per hectare (active)
    2.16 to 2.88 kg/ha
    0.6 kg/ha
    Rate per hectare (product)
    3 to 4 L/ha
    1.25 L/ha
    Rate per acre (product)
    1.2 to 1.6 L/ac
    0.5 L/ac

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • Use higher rates on heavy grass infestations and for fall panicum. Fall panicum may not be controlled all season.
    • Grassy weeds beyond the 2 leaf stage will not be controlled.
    • See precautions for Banvel II or Oracle alone.
    • Do NOT apply to coarse (sand) textured soils with less than 2% organic matter.
    Prowl 400
    Trade Name
    Prowl 400
    Active Ingredient
    pendimethalin
    Formulation
    400 g/L
    Rate per hectare (active)
    1.68 kg/ha
    Rate per hectare (product)
    4.2 L/ha
    Rate per acre (product)
    1.68 L/ac

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • PROWL alone will not control emerged weeds. Tank-mixing or use of a sequential herbicide program to achieve broad spectrum control is recommended. Plant corn at least 4 cm deep and ensure good seed coverage. PROWL may be applied in water or liquid fertilizer (rate of 200 L liquid fertilizer/ha (80 L liquid fertilizer/ac)). Conduct a liquid fertilizer compatibility test with any of the registered PROWL tank-mix combinations. If there is no rain within 7 days, rotary hoeing or shallow cultivation is required.
    Prowl 400 + atrazine
    Trade Name
    Prowl 400
    		 + atrazine
    Active Ingredient
    pendimethalin
    + atrazine
    Formulation
    400 g/L
    480 g/L*
    Rate per hectare (active)
    1.68 kg/ha
    1.53 kg/ha
    Rate per hectare (product)
    4.2 L/ha
    3.19 L/ha
    Rate per acre (product)
    1.68 L/ac
    1.28 L/ac

    *See Table 4-1. Herbicides Used in Ontario for formulations available. See label for specific uses and rates.

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • See precautions for Prowl alone.
    Prowl 400 + Banvel II or Oracle
    Trade Name Prowl 400 + Banvel II or Oracle
    Active Ingredient
    pendimethalin
    + dicamba
    Formulation
    400 g/L
    480 g/L
    Rate per hectare (active)
    1.68 kg/ha
    0.6 kg/ha
    Rate per hectare (product)
    4.2 L/ha
    1.25 L/ha
    Rate per acre (product)
    1.68 L/ac
    0.5 L/ac

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • See precautions for Prowl alone and Banvel II or Oracle alone.
    Prowl 400 + Marksman
    Trade Name Prowl 400 + Marksman
    Active Ingredient
    pendimethalin
    + dicamba/atrazine
    Formulation
    400 g/L
    393 g/L
    Rate per hectare (active)
    1.68 kg/ha
    1.48 to 1.8 kg/ha
    Rate per hectare (product)
    4.2 L/ha
    3.7 to 4.5 L/ha
    Rate per acre (product)
    1.68 L/ac
    1.5 to 1.8 L/ac

    Precautions

    • Do NOT use on seed corn or sweet corn.
    • Apply PRE or POST up to the 3 leaf stage of field corn.
    • See precautions for Prowl alone and Banvel II or Oracle alone.

    Related Links


    For more information:
    Toll Free: 1-877-424-1300
    Local: (519) 826-4047
    E-mail: ag.info.omafra@ontario.ca
    Author: OMAFRA Staff
    Creation Date: 25 November 2002
    Last Reviewed: 30 January 2010