Herbicide Recommendations for Field Grown Woody Nursery Stock: Postemergence Grass and Broadleaf Herbicides

Excerpt from 2008 Chapter 16, Publication 75, Guide to Weed Control, Order this publication

Table of Contents

1. 2,4-D Amine + Glyfos
2. Amitrol 240
3. Glyphosate
4. Nursery and Ornamental Herbicide Rating Table (Table 16-1) (PDF 63 k)
   • Annual Grasses
   • Annual Broadleaf Weeds
   • Perennial Weeds
5. Other Woody Nursery Stock Weed Control Recommendations
   • Woody Nursery Stock (Field Grown)
     • Soil Applied Grass Herbicides
     • Soil Applied Broadleaf Herbicides
     • Soil Applied Grass and Broadleaf Herbicides
     • Postemergence Grass Herbicides
   • Woody Nursery Stock (Container Beds)
     • Soil Applied Grass and Broadleaf Herbicides
     • Postemergence Grass and Broadleaf Herbicides
   • Woody Nursery Stock (Container Stock)
     • Soil Applied Broadleaf Herbicides
     • Soil Applied Grass and Broadleaf Herbicides
     • Postemergence Grass Herbicides
6. Related Links

Precautions

• Ground directed spray only.
• Apply ONLY to Balsam Fir and Fraser Fir.
• Trees must be 1.2 metres high and spray should not touch the branches.
• Appy once per year in June.
• Appy mix in 100 L of water/ha.

Precautions

• To be applied ONLY on spruce (Picea spp.)
• Apply postemergence to actively growing plants, good coverage is essential.
• If weeds are mature, it is advisable to cut them and then spray the re-growth.
• Do NOT disturb treated plants for 2 weeks after application.
• Do NOT make postharvest applications after October 1.
• To control quackgrass and Canada Thistle, apply in the spring or fall to actively growing plants that are 15-20 cm tall. Wait 10-14 day and then plough or disk.
• Avoid application to the crop during periods of rapid shoot elongation in the spring.
• Applications can be made in the first year (0.68 L/ac) in either seedbed or transplants, but only after the seedlings have set bud.
• The rate may be increased to 1.2 L/ac for actively growing seedlings or transplant bareroot spruce beyond the first year.
  

Precautions

• For actively growing weeds in the fall, or spring prior to emergence of any crop.
• Allow 5-7 days translocation time after application before doing any tillage when conditions are good. If cool temperatures follow application, allow additional time for translocation to be completed before disturbing treated weeds.
• Only weeds emerged at application time will be controlled. Additional weed control programs will be necessary to control weeds germinating later.
• Repeat application to regrowth may be necessary for complete control.
• For specific information on product rates and notes for annual and perennial weed control refer to Table 4-2.

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  Related Links

  • Weeds in Ontario
  • Nursery and Landscape Plants in Ontario
  • Problem Weed Control in Field Crops
  • 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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