Canola - Winter and Spring Planted: Postemergence Grass Herbicides

Pub 75: Guide to Weed Control > Other Field Crops > Canola - Winter and Spring Planted: Postemergence Grass Herbicides

Excerpt from 2010/2011 Publication 75, Guide to Weed Control, Order this publication

Table of Contents

1. Assure II + Sure-Mix
2. Excel Super
3. Poast Ultra + Merge for annual grasses
4. Poast Ultra + Merge for quackgrass
5. Select + Amigo
6. Venture L for volunteer cereals
7. Venture L for grasses
8. Canola Herbicide Ratings Tables (Table 12-1) (PDF 93 kb)
   • Annual Grasses
   • Annual Broadleaf Weeds
   • Perennial Weeds
9. Related Links

Assure II + Sure-Mix

Trade Name	Assure II	+ Sure-Mix
Active Ingredient	quizalofop-p-ethyl	+ oil concentrate
Formulation	96 g/L
Rate per hectare (active)	0.036 - 0.072 kg/ha	0.5% v/v
Rate per hectare (product)	0.375 - 0.75 L/ha	5 L/1,000 L
Rate per acre (product)	0.15 - 0.3 L/ac	5 L/1,000 L

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

• Apply to annual grasses and volunteer cereals in the 2 leaf to tillering stage and to quackgrass in the 2-6 leaf stage of growth.
• Canola is tolerant at all growth stages.
• Do NOT apply to canola within 64 days of harvest.

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  Excel Super

  Trade Name	Excel Super
  Active Ingredient	fenoxaprop-p-ethyl
  Formulation	80.5 g/L
  Rate per hectare (active)	0.054 kg/ha
  Rate per hectare (product)	0.67 L/ha
  Rate per acre (product)	0.27 L/ac

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

• Apply to annual grasses in the 1-6 leaf stage of growth.
• Canola is tolerant at all growth stages.
• This treatment will not control volunteer winter wheat.

Poast Ultra + Merge

Trade Name	Poast Ultra	+ Merge
Active Ingredient	sethoxydim	+ surfactant/solvent
Formulation	450 g/L
Rate per hectare (active)	0.15 - 0.2 kg/ha	1 - 2 L/ha
Rate per hectare (product)	0.32 - 0.47 L/ha	1 - 2 L/ha
Rate per acre (product)	0.13 - 0.19 L/ac	0.4 - 0.8 L/ac

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

• Apply at 1-6 leaf stages of annual grasses
• Canola is tolerant at all growth stages.

Poast Ultra + Merge

Trade Name	Poast Ultra	+ Merge
Active Ingredient	sethoxydim	+ surfactant/solvent
Formulation	450 g/L
Rate per hectare (active)	0.5 kg/ha	1 - 2 L/ha
Rate per hectare (product)	1.1 L/ha	1 - 2 L/ha
Rate per acre (product)	0.45 L/ac	0.4 - 0.8 L/ac

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

• Thorough preplant tillage will provide more uniform quackgrass emergence.
• Apply to quackgrass in the 1-3 leaf stage of growth.

Select + Amigo

Trade Name	Select	+ Amigo
Active Ingredient	clethodim	+ surfactant
Formulation	240 g/L
Rate per hectare (active)	0.03 - 0.045 kg/ha	0.5% v/v
Rate per hectare (product)	0.13 - 0.19 L/ha	5 L/1,000 L
Rate per acre (product)	0.05 - 0.08 L/ac	5 L/1,000 L

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

• Canola is tolerant at all growth stages.
• Apply to annual grasses and volunteer cereals in the 2-6 leaf stage of growth.
• Suppression of quackgrass when applied at the higher dose.

Venture L

Trade Name	Venture L
Active Ingredient	fluazifop-p-butyl
Formulation	125 g/L
Rate per hectare (active)	0.100 kg/ha
Rate per hectare (product)	0.8 L/ha
Rate per acre (product)	0.32 L/ac

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

• For the control of volunteer cereals.
• Apply at the 2-5 leaf stage of volunteer cereals.
  

Venture L

Trade Name	Venture L
Active Ingredient	fluazifop-p-butyl
Formulation	125 g/L
Rate per hectare (active)	0.125 - 0.175 kg/ha
Rate per hectare (product)	1.0 - 1.4 L/ha
Rate per acre (product)	0.4 - 0.57 L/ac

Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).

• Apply to annual grasses in the 2-5 leaf stage of growth and 3-5 leaf stage of quackgrass.
• Use the 1.4 L/ha (0.57 L/ac) rate for a mixed stand of annual grasses and quackgrass.
• Do NOT apply VENTURE to canola later than the 5 leaf stage of crop growth.

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Related Links

• Weeds in Ontario
• Flax and Sunflowers in Ontario
• Canola and Mustard in Ontario
• Problem Weed Control in Field Crops
• Integrated Pest Management (IPM)
• Pesticide Application and Safety
• Pesticide Companies and Agents
• OMAFRA Sprayer Calibration Calculator
• Search the PMRA website
• OMAFRA Publication 505: Ontario Weeds
• OMAFRA Publication 75: Guide To Weed Control