Herbicide Recommendations for Forage Legumes (Direct Seeded): Postemergence Grass Herbicides

Table of Contents

1. Select + Amigo
2. Venture L
3. Poast Ultra + Assist or Merge for annual grasses
4. Poast Ultra + Merge for quackgrass
5. Forage Crops Herbicide Weed Control Ratings (Table 10-1) (PDF file - 62 kb)
   • Annual Grasses
   • Broadleaf Weeds
   • Perennial Weeds
6. Other Forage Crops Weed Control Recommendations
   • Forage Legumes (Established; Broadleaf, or Broadleaf & Grass Herbicides for Direct Seeded)
   • Forage Sorghum and Forage Millet
   • Pasture Renovation with Bird's-foot Trefoil
   • Pastures (mostly grasses)
7. Stages of Leaf Development
   • Alfalfa, Red Clover Ladino, Aslike and Black Medic
   • Bird's-foot Trefoil
8. Related Links

Precautions

• Apply when the annual grasses and volunteer cereals are in the 2-6 leaf stage.
• For pure stands of alfalfa only.
• Alfalfa is tolerant at any growth stage.
• Use the higher rate for control of quackgrass.
• Allow 30 days between application and harvest.

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Precautions

• Use the higher rate (2 L/ha (0.8 L/ac)) when quackgrass is present.
• Apply at 2-4 leaf stage of annual grasses and at 3-5 leaf stage quackgrass.
• Venture L may be tank-mixed with 2,4-DB at label rates for control of a broad range of weeds. (Consult 2,4-DB label).
• Alfalfa may be fed to livestock 41 days after treatment.
• Do NOT feed or graze red clover or bird's-foot trefoil in the year of treatment.

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Precautions

• Apply Poast Ultra to emerged annual grasses in the 1-6 leaf stage during active growth while the crop is small enough to permit thorough spray coverage.
• Alfalfa is tolerant to Poast Ultra at any stage of growth.
• Use MERGE for conditions or weeds requiring medium to high rates of Poast Ultra.
• Complete control is normally obtained 7-21 days after application.
• Allow 70 days between spraying and harvest.

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Precautions

• Apply at the 1-3 leaf stage of actively growing quackgrass.
• Thorough preplant tillage will give more uniform quackgrass emergence.
• Gives 6-8 weeks control of quackgrass.
• Allow 70 days between spraying and harvest.

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Related Links

... on general Weed topics
... on general Forage and Pasture topics
... on pesticide labels, search the PMRA website
... on weed identification, order OMAFRA Publication 505: Ontario Weeds
... on weed control, order OMAFRA Publication 75: Guide To Weed Control

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