Herbicide Recommendations for Carrots: Postemergence Grass and Broadleaf Herbicides

Excerpt from Chapter 13, Publication 75, Guide to Weed Control, Order this publication

Table of Contents

1. Lorox
2. Mineral oil
3. Vegetable Herbicide Weed Control Ratings (Table 13-1) (PDF file - 86Kb)
   • Annual Grasses
   • Broadleaf Weeds
   • Perennial Weeds
4. Other Carrot Weed Control Recommendations
   • Preplant Incorporated followed by Postemergence
   • Preemergence followed by Postemergence
   • Soil Applied Grass and Broadleaf Herbicides
   • Postemergence Grass Herbicides
5. Related Links

Precautions

• For carrots not treated with linuron PRE.
• Spray when crop has 2 or more fully developed leaves (8-15 cm tall).
• Apply before annual grasses are 5 cm high & before broadleaf weeds are 15 cm high.
• Carrot leaves will become yellow or light green, but they will soon regain their normal colour.
• Use nozzle pressure of 175-275 kPa. Do NOT exceed 275 kPa.
• Do NOT apply with herbicidal oil.
• Do NOT apply during hot, dry weather (>32ºC) or when crop is under stress.

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Precautions

• Apply as soon as true leaves develop and before carrot roots are thicker than a pencil.
• Later treatments may produce an oil flavor.
• Weeds should be less than 10 cm high.
• Ragweed, wormwood, and wild carrot are not controlled.

Related Links

• Weeds in Ontario
• Vegetables in Ontario
• Carrots 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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