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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
Table
of Contents
- Dual II Magnum + Banvel II or Oracle)
- Dual II Magnum (+ Banvel II or Oracle + atrazine)
- Dual II Magnum + Callisto + Aatrex Liquid
- Dual II Magnum + Marksman or Propero
- Converge Flexx + atrazine
- Frontier Max + atrazine
- Frontier Max + Banvel II
- Frontier Max + Marksman
- Primextra II Magnum + Callisto
- Primextra II Magnum + Banvel II or Oracle
- Prowl 400
- Prowl 400 + atrazine
- Prowl 400 + Banvel II or Oracle
- Prowl 400 + Marksman
- Corn Herbicide Weed Control Ratings (Table 9-1) (PDF
file - 214kb)
- Corn Leaf Stages
- Why is Early Season Weed
Control so Important in Corn?
- 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
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