Herbicide Recommendations for Soybeans: Soil Applied Grass and Broadleaf Herbicides


Pub 75: Guide to Weed Control > Soybeans > Herbicide Recommendations for Soybeans: Soil Applied Grass and Broadleaf Herbicides

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

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Boundary1
  2. Broadstrike Dual Magnum
  3. Command
  4. Conquest LQ + Pursuit + Sencor
  5. Pursuit
  6. Valor
  7. Soybean Herbicide Weed Control Ratings (Table 11-1) (PDF file - 59 kb)
  8. Other Soybean Weed Control Recommendations
  9. Stages of Soybean Leaf Development
  10. 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 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.

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 4-4 (PDF - 82K).

Command 360 ME
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

  • DO NOT use on Natto soybeans.
  • Apply PRE
  • Do NOT incorporate.
  • For light textured soils - apply Command at 1.6 L/ha.
  • For medium textured soils - apply Command at 2.3 L/ha.
  • For heavy textured soils - apply Command at 2.35 L/ha.
  • Control of Yellow foxtail is achieved when Command is applied at 2.3 to 2.35 L/ha.
  • Some rotational cropping restrictions apply Refer to (Table 4-4 (PDF - 82K).

Conquest LQ1
Trade Name
+ Pursuit
+ Sencor
Active Ingredient
imazethapyr
+ metribuzin
Formulation
240 g/L
480 g/L
Rate per hectare (active)
0.075 to 0.1 kg/ha
0.3 to 0.4 kg/ha
Rate per hectare (product)
0.312 to 0.42 L/ha
0.625 to 0.833 L/ha
Rate per acre (product)
0.125 to 0.168 L/ha
0.25 to 0.33 L/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.
  • Use higher rates for heavier weed pressure, for fine textured soils or soils high in organic matter.
  • See Pursuit for additional comments.

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 4-4 (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.

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 4-4 (PDF - 82K) for rotation restrictions.

Related Links


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