Herbicide Recommendations for Forage Legumes (Established):
Postemergence Grass and Broadleaf Herbicides

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

Table of Contents

1. Glyphosate
2. Pursuit + non-ionic surfactant + liquid fertilizer
3. Gramoxone
4. Simadex, Princep Nine-T or Simazine 80W
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 (Direct Seeded, POST Broadleaf or Grass Herbicides or Preharvest)
   • 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

• SPOT TREATMENT ONLY: Apply when field bindweed has reached full bloom and other weeds are in the bud to full bloom stage.
• Do NOT graze or harvest forage from treated spots until the treated plants turn brown.

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Precautions

• Apply only after the crop has one fully developed trifoliate leaf.
• For seed alfalfa only.
• One application per year. Apply early postemergence when weeds are less than 7.5 cm (3 in.) tall.
• Apply in 200 L/ha (80 L/ac) water.

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Precautions

• Apply to trefoil seed fields when the crop is about 15 cm high in the spring.
• Apply to alfalfa or trefoil forage fields within 5 days after cutting.
• Slow recovery and some stand reduction has been observed under conditions of drought or high temperatures.
• Do NOT use in the spring after treatment with simazine.

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Precautions

• Apply in September to November before freeze up.
• This treatment will also prevent legume seedlings from establishing for approximately 8 months.
• Do NOT use Simadex on alfalfa.
• Do NOT use in the fall before seeding another crop.
• Do NOT apply Gramoxone within one 1 year after simazine application.
• Do NOT apply to the same field for more than 3 consecutive yrs.
• Allow 30 days between applications and grazing cattle or sheep.

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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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