Herbicide Recommendations for 2nd Year Crown-Established Asparagus: Soil Applied Grass and Broadleaf Herbicides

Table of Contents

1. Karmex or Diurex
2. Princep Nine-T + Devrinol
3. Princep Nine-T, Simadex or Simazine
4. Sinbar
5. Vegetable Herbicide Weed Control Ratings (Table 13-1) (PDF file - 24kb)
   • Annual Grasses
   • Broadleaf Weeds
   • Perennial Weeds
6. Other Asparagus Weed Control Recommendations:
• Before Emergence of Direct Seeded Asparagus
  • Postemergence Grass and Broadleaf Herbicides
• Direct Seeded Asparagus
  • Postemergence Grass Herbicides
• 1st Year Crown-Established Asparagus
  • Soil Applied Grass and Broadleaf Herbicides
  • Postemergence Grass Herbicides
• 2nd Year & Established Asparagus
  • Soil Applied Broadleaf Herbicides
  • Postemergence Grass Herbicides
  • Postemergence Broadleaf and Grass Herbicides
  • Before Spear Emergence or After Last Cutting
  • During Harvest Immediately After Cutting
  • After Last Cutting
• 3rd Year and Established Asparagus
  • Before Spear Emergence or After Last Cutting
7. Related Links

Precautions

• PRE - Disk before any shoots appear in the spring on established plantings.
• A second application may be made after the postharvest disking.
• Use lower rates for lighter soils.
• Rates are given for overall sprays; reduce proportionately if ONLY rows are sprayed.
• Do NOT use on fields that will be removed after harvest.

Precautions

• PRE - Disk before any shoots appear in the spring on established plantings.
• Use lower rates for lighter soils.
• Make ONLY one application per season.
• Do NOT apply within 6 days of harvest.

Precautions

• PRE - Apply preemergence to crop, 7 days before first cutting.
• Use ONLY on established plantings 3 years or older.
• A second application may be made after the postharvest disking.
• Use lower rates for lighter soils.
• Rates are given for overall sprays; reduce proportionately if ONLY rows are sprayed
• Do NOT use on fields that will be removed after harvest.

Precautions

• PRE - Apply before spears emerge, or immediately after clean cutting.
• Apply ONLY on established asparagus beds.
• Apply ONLY once throughout the entire growing season.
• Apply before weeds emerge, or to small, actively growing weeds (up to 5 cm).
• Do NOT use on soils containing less than 1% organic matter, or where subsoil or roots are exposed.
• Do NOT use on plants that are weak or diseased, or lacking in vigor (slow growing).
• Do NOT harvest within 5 days of treatment.
• Treated areas may be replanted to asparagus the following year after application.
• Do NOT plant any other crop for 2 years.

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Related Links

• Weeds in Ontario
• OMAFRA Vegetables: Asparagus
• Vegetables in Ontario
• 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

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