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

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

Table of Contents

1. Assure II + Sure-Mix
2. Kerb
3. Poast Ultra + Merge
4. Venture L
5. Forage Crops Herbicide Weed Control Ratings (Table 10-1) (PDF file - 64 kb)
   • Annual Grasses
   • Broadleaf Weeds
   • Perennial Weeds
6. Other Forage Crops Weed Control Recommendations
   • Forage Legumes (Direct Seeded, POST Broadleaf and/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

• Apply to emerged annual grasses and volunteer cereals in the 2-leaf to tillering stage and to quackgrass in the 2-6 leaf stage of growth.
• For seed alfalfa only.
• Do NOT graze or cut for hay in the year of treatment.
• Use the 0.375 L/ha rate (0.15 L/ac) for control of volunteer corn, volunteer cereals and green foxtail.
• The 0.5 L/ha (0.2 L/ac) rate provides suppression of quackgrass and will also control barnyard grass.
• Use the 0.75 L/ha (0.3 L/ac) rate for control of quackgrass.

Precautions

• For grass control only in alfalfa and bird's-foot trefoil.
• Apply in late September to early November before the soil freezes.
• Do NOT graze or harvest treated forage within 90 days for the high rate and 60 days for lower rates.

Precautions

• Apply at the 1-3 leaf stage of actively growing quackgrass.
• Apply in 110-200 L/ha (44-80 L/ac) water.
• Quackgrass control will be provided for 6-8 weeks.
• Allow 70 days between spraying and harvest.

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 red clover or bird's-foot trefoil to livestock in the year of treatment.

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