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Herbicide Recommendations for
Soybeans: Soil Applied Grass and Broadleaf Herbicides
| Author: |
OMAFRA Staff
|
| Creation Date: |
25 November
2002
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| Last Reviewed: |
10 May 2008
|
Excerpt from 2008 Chapter 11, Publication 75, Guide to Weed Control,
Order this publication
Table
of Contents
- Boundary1
- Broadstrike Dual Magnum
- Command
- Conquest
- Pursuit
- Valor
- Soybean Herbicide Weed Control Ratings (Table 11-1) (PDF
file - 133 kb)
- Other Soybean Weed Control Recommendations
- Stages of Soybean Leaf
Development
- Related Links
Boundary1
| Trade Name |
|
|
| Active Ingredient |
s-metolachlor
|
+ metribuzin
|
| Formulation |
EC
|
Su
|
| Rate per hectare (active) |
1.05 to 1.60 kg/ha
|
0.43 to 0.653 kg/ha
|
| Rate per hectare (product) |
1.15 to 1.75 kg/ha
|
0.575 to 0.87 kg/ha
|
| Rate per acre (product) |
0.46 to 0.7 L/ac
|
0.233 to 0.53 kg/ac
|
Precautions
- Apply PP, PPI or PRE.
- Under preplant uses, a tank-mixture with glyphosate may be used to
control emerged weeds.
- Do NOT apply to coarse textured soils with less
than 2% OM.
- Can be tank-mixed with glyphosate or Gramoxone for PP burndown of
emerged annual and perennial weeds, see Chapter
6, for more information.
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Broadstrike Dual Magnum
| Trade Name |
|
| Active Ingredient |
flumetsulam/metolachlor |
| Formulation |
924.7 g/L |
| Rate per hectare (active) |
1.44 kg/ha |
| Rate per hectare (product) |
1.56 L/ha |
| Rate per acre (product) |
0.624 L/ac |
Precautions
- Apply PP, PPI or PRE. For PPI treatments uniformly incorporate with
equipment set to work at a depth of 5-8 cm.
- For PP treatments in minimum or no-till systems apply up to 21 days
before planting.
- Can be tank-mixed with glyphosate for PP burndown of emerged annual
and perennial weeds, see Chapter
6, for more information.
- Do NOT apply to areas where the soil pH is >7.8
and organic matter < 2%.
- Do NOT apply to soils containing more than 5% organic
matter.
- Sufficient rainfall to moisten the soil to a depth of 5 cm should
be received within 7-10 days for optimum weed control.
- This formulation separates into 2 phases over time. Shake container
before using.
- Some rotational cropping restrictions apply (Table
4-3 (PDF - 80K)
and Table 4-4 (PDF
- 82K)).
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Command
| Trade Name |
|
| Active Ingredient |
clomazone |
| Formulation |
360 g/L |
| Rate per hectare (active) |
0.576 to 0.846 kg/ha |
| Rate per hectare (product) |
1.6 to 2.35 L/ha |
| Rate per acre (product) |
0.64 to 0.94 L/ac |
Precautions
- Apply PRE
- Do NOT incorporate.
- For light textured soils - apply at 1.6 L/ha.
- For medium textured soils - apply at 2.3 L/ha.
- For heavy textured soils - apply at 2.35 L/ha.
- Control of Yellow foxtail is achieved when Command is applied at 2.3
to 2.35 L/ha.
- Do NOT use on Natto soybeans.
- Some rotational cropping restrictions apply Refer to Table
4-3 (PDF - 80K)
.
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Conquest1
| Trade Name |
|
|
| Active Ingredient |
imazethapyr
|
+ metribuzin
|
| Formulation |
70 SG
|
75 WG
|
| Rate per hectare (active) |
0.075 kg/ha
|
0.425 kg/ha
|
| Rate per hectare (product) |
0.107 kg/ha
|
0.567 kg/ha
|
| Rate per acre (product) |
0.043 kg/ha
|
0.23 kg/ac
|
Precautions
- Apply PPI or PRE.
- Can be tank-mixed with glyphosate for PP burndown of emerged annual
and perennial weeds, see Chapter
6, for more information.
- For use on medium and heavy textured soils only.
- See Pursuit for additional comments.
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Pursuit
| Trade Name |
|
| Active Ingredient |
imazethapyr |
| Formulation |
240 g/L |
| Rate per hectare (active) |
0.075 to 0.1 kg/ha |
| Rate per hectare (product) |
0.312 to 0.42 L/ha |
| Rate per acre (product) |
0.125 to 0.168 L/ac |
Precautions
- Apply PP, PPI or PRE.
- Can be tank-mixed with glyphosate or Gramoxone for PP burndown of
emerged annual and perennial weeds, see Chapter
6, for more information.
- Some rotational cropping restrictions apply (Table
4-3 (PDF - 80K)
and Table 4-4 (PDF
- 82K)).
- Addition of non-ionic surfactant and liquid fertilizer is required
if emerged weeds are present at application.
- For preplant applications:
- apply Pursuit at 0.168 L/ac;
- apply up to 30 days prior to planting;
- For minimum tillage, only one working of the soil to prepare a
seedbed is recommended following application. Make this final seedbed
preparation no deeper than 10 cm and do not turn untreated soil
to the surface.
- For preplant incorporated applications apply Pursuit at 0.125L/ac.
- For preemergence applications, heavy infestations of ragweed and/or
barnyard grass require a tank-mix.
- For preplant incorporated applications heavy infestations of lamb's-quarters,
ragweed or barnyard grass may require a tank-mix.
- Do NOT apply as preplant incorporated application
more than one year in sequence.
- Use only once per season.
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Valor
| Trade Name |
|
| Active Ingredient |
imazethapyr/pendimethalin |
| Formulation |
342 g/L (1:14.5) |
| Rate per hectare (active) |
1.165 kg/ha |
| Rate per hectare (product) |
3.4 L/ha |
| Rate per acre (product) |
1.36 L/ac |
Precautions
- Apply PPI.
- Allow 24 months between applications.
- See Pursuit for additional comments.
- Refer to Table 4-3
(PDF - 80K) and Table
4-4 (PDF - 82K)
for rotation restrictions.
| Top of Page |
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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