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Herbicide Recommendations for Soybeans: Postemergence Grass and Broadleaf Herbicides, and Tank-Mixes - Roundup Ready (glyphosate tolerant) varieties only

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 10 May 2008

Pub 75: Guide to Weed Control > Soybeans > Herbicide Recommendations for Soybeans: Postemergence Grass and Broadleaf Herbicides, and Tank-Mixes -- Roundup Ready varieties only

Excerpt from 2008 Chapter 11, Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Glyphosate (annual weeds)
  2. Glyphosate (sequential)
  3. Glyphosate (perennial weeds)
  4. Glyphosate + Assure II
  5. Glyphosate + Firstrate
  6. Glyphosate + Venture
  7. Glyphosate + Pursuit
  8. Guardian1 (Touchdown iQ + Classic)
  9. Soybean Herbicide Weed Control Ratings (Table 11-1) (PDF file - 133 kb)
  10. Other Soybean Weed Control Recommendations
  11. Stages of Soybean Leaf Development
  12. Related Links
Glyphosate
Trade Name
Active Ingredient
glyphosate
or glyphosate
or glyphosate
or glyphosate
Formulation
360 g/L
480 g/L
500 g/L
540 g/L
Rate per hectare (active)
0.9 kg/ha
0.9 kg/ha
0.9 kg/ha
0.9 kg/ha
Rate per hectare (product)
2.5 L/ha
1.875 L/ha
1.8 L/ha
1.67 L/ha
Rate per acre (product)
1 L/ac
0.75 L/ac
0.72 L/ac
0.67 L/ac

Precautions

  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soy Beans".
  • Apply between the first trifoliate leaf stage and the full flower stage of the soybeans.
  • Weeds are more easily controlled and weed competition avoided when applications are made when weeds are small, although weeds up to 25 cm tall will be controlled.
  • A second application may be made for later flushes emerging after the initial application.
  • Use 100-200 L/ha (40-80 L/ac) water.

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Glyphosate
Trade Name
Active Ingredient
glyphosate
glyphosate
glyphosate
glyphosate
Formulation
360 g/L
480 g/L
500 g/L
540 g/L
Rate per hectare (active)
0.9 + 0.9 kg/ ha
0.9 + 0.9 kg/ ha
0.9 + 0.9 kg/ ha
0.9 + 0.9 kg/ ha
Rate per hectare (product)
2.5 + 2.5 L/ha
1.875 + 1.875 L/ha
1.8 + 1.8 L/ha
1.67 + 1.67 L/ha
Rate per acre (product)
1 + 1 L/ac
0.75 + 0.75 L/ac
0.72 to 0.72 L/ac
0.67 to 0.67 L/ac

Precautions

  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soybeans".
  • Sequential applications are desirable when there are perennial weeds emerging over a long period of time (i.e. sow-thistle, Canada Thistle).
  • For best results, apply the second application 14 days after the first.
  • Apply when milkweed, perennial sow-thistle and Canada thistle are 15-60 cm and nutsedge is 5-15 cm in height and actively growing for best results.

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Glyphosate
Trade Name
Active Ingredient
glyphosate
or glyphosate
or glyphosate
or glyphosate
Formulation
360 g/L
480 g/L
500 g/L
540 g/L
Rate per hectare (active)
1.8 kg/ha
1.8 kg/ha
1.8 kg/ha
1.8 kg/ha
Rate per hectare (product)
5 L/ha
3.75 L/ha
3.6 L/ha
3.33 L/ha
Rate per acre (product)
2 L/ac
1.5 L/ac
1.44 L/ac
1.33 L/ac

Precautions

  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soybeans".
  • Apply when milkweed, perennial sow-thistle and Canada thistle are 15-60 cm and nutsedge is 5-15 cm in height and actively growing for best results.

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Glyphosate + Assure II
Trade Name glyphosate or glyphosate or glyphosate or glyphosate + Assure II
Active Ingredient
glyphosate
or glyphosate
or glyphosate
or glyphosate
+ quizalofop-p-ethyl
Formulation
360 g/L
480 g/L
500 g/L
540 g/L
96 g/L
Rate per hectare (active)
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.024 kg/ha
Rate per hectare (product)
2.5 to 5 L/ha
1.875 to 3.75 L/ha
1.8 to 3.6 L/ha
1.67 to 3.33 L/ha
0.25 L/ha
Rate per acre (product)
1 to 2 L/ac
0.75 to 1.5 L/ac
0.72 to 1.44 L/ac
0.67 to 1.33 L/ac
0.1 L/ac

Precautions

  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soybeans".
  • The addition of Assure II is needed to control volunteer "Roundup Ready" corn.
  • Apply to volunteer corn up to 30 cm (12") in height.
  • Do NOT apply to soybeans within 80 days of harvest.
  • Suremix may or may not be added to this tank-mix. If adding Suremix do so at a rate of 5 L/1,000 L water.

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Glyphosate + Firstrate
Trade Name
Active Ingredient
glyphosate
glyphosate
glyphosate
glyphosate
+ cloransulam-methyl
Formulation
360 g/L
480 g/L
500 g/L
540 g/L
84 WG
Rate per hectare (active)
0.45 to 0.9 kg/ha
0.45 to 0.9 kg/ha
0.45 to 0.9 kg/ha
0.45 to 0.9 kg/ha
17.5 g/ha
Rate per hectare (product)
1.25 to 2.5 L/ha
0.94 to 1.875 L/ha
0.9 to 1.8 L/ha
0.84 to 1.67 L/ha
20.8 g/ha
Rate per acre (product)
0.5 to 1 L/ac
0.38 to 0.75 L/ac
0.36 to 0.72 L/ac
0.34 to 0.67 L/ac
8.5 g/ac

Precautions

  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soybeans".
  • The addition of Firstrate will provide residual control of common ragweed, velverleaf, cocklebur, jimsonweed and giant ragweed.
  • Do NOT apply to soybeans within 65 days of harvest.

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Glyphosate + Venture
Trade Name
Active Ingredient
glyphosate
glyphosate
glyphosate
glyphosate
+ fluazifop-p-butyl
Formulation
360 g/L
480 g/L
500 g/L
540 g/L
 EC
Rate per hectare (active)
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.075 kg/ha
Rate per hectare (product)
2.5 to 5 L/ha
1.87 to 3.75 L/ha
1.8 to 3.6 L/ha
1.67 to 3.33 L/ha
0.6 L/ha
Rate per acre (product)
1 to 2 L/ac
0.75 to 1.5 L/ac
0.72 to 1.44 L/ac
0.67 to 1.33 L/ac
0.243 L/ac

Precautions

  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soybeans".
  • The addition of Venture is needed to control volunteer "Roundup Ready" corn.
  • Apply to volunteer corn at the 2-5 leaf stage.

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Glyphosate + Pursuit

Trade Name
Active Ingredient
glyphosate
glyphosate
glyphosate
glyphosate
+ imazethapyr
Formulation
360 g/L
480 g/L
500 g/L
540 g/L
240 g/L
Rate per hectare (active)
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.9 to 1.8 kg/ha
0.038 to 0.05 kg/ha
Rate per hectare (product)
2.5 to 5 L/ha
1.87 to 3.75 L/ha
1.8 to 3.6 L/ha
1.67 to 3.33 L/ha
0.16 to 0.21 L/ha
Rate per acre (product)
1 to 2 L/ac
0.75 to 1.5 L/ac
0.72 to 1.44 L/ac
0.67 to 1.33 L/ac
0.065 to 0.085 L/ac

Precautions

  • Factor, Roundup Transorb, Roundup Weathermax or Touchdown iQ can be tank-mixed with Pursuit.
  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soybeans".
  • Apply between the first trifoliate leaf stage and the third trifoliate leaf stage of the soybeans.
  • Use only once per season.
  • Some rotational cropping restrictions apply (see Pursuit label and Table 4-3,).

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Guardian1 (Touchdown iQ + Classic)
Trade Name
Active Ingredient
glyphosate
+ chlorimuron-ethyl
Formulation
360 g/L
25 DF
Rate per hectare (active)
0.9 kg/ha
9 g/ha
Rate per hectare (product)
2.5 L/ha
+ 36 g/ha
Rate per acre (product)
1 L/ac
+ 14 g/ac

Precautions

  • For use only with pedigreed (certified) soybean seed designated as "Roundup Ready Soybeans".
  • Apply after the 1st trifoliate leaves have expanded and before soybeans have begun to flower
  • Do NOT apply before the 1st trifoliate leaves have fully expanded
  • Use only once per season
  • Some rotational cropping restrictions apply (see Classic label and Table 4-3 (PDF - 80K))

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Related Links

 

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