Herbicide Recommendations for Established Shelterbelts (Windbreaks): Soil Applied Grass and Broadleaf Herbicides

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

Table of Contents

1. Casoron
2. Dacthal
3. Princep Nine-T or Simazine
4. Treflan or Bonanza
5. Nursery and Ornamental Herbicide Rating Table (Table 16-1) (PDF 63k)
   • Annual Grasses
   • Annual Broadleaf Weeds
   • Perennial Weeds
6. Other Shelterbelt Weed Control Recommendations
   • Established Shelterbelts (Windbreaks)
     • Postemergence Grass Herbicides
     • Postemergence Grass and Broadleaf Herbicides
   • Transplanted Shelterbelts (Windbreaks)
     • Soil Applied Grass and Broadleaf Herbicides
     • Postemergence Grass Herbicides
7. Related Links

Precautions

• PRE - Apply in early spring or late fall.
• Use the lower rate for spring application.
• Tolerant species include cedar, linden, maple, willow, caragana and ash. Reduce rates on lighter soils.

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Precautions

• Apply at lining out, late fall, or early spring in 340 L of water..
• Applications should be made to soil recently cultivated to a uniform texture.
• Rain or irrigation (about 1 cm) is needed to activate this herbicide.

Precautions

• PRE - Apply in 500 L/ha (200 L/ac) water.
• Apply in the fall or spring prior to weed emergence or after emerged weeds have been removed.
• Windbreak species must be established for at least one year.
• Tolerant species include cedar, spruce, black walnut, white ash, green ash, elm, boxelder, maple and caragana.
• Check label for species which will tolerate higher rates of simazine. Apply before buds break in spring.
• Use low rate for sandy soils or low organic matter soils.

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Precautions

• PPI - Apply as a directed spray to the soil surface around the trees or shrubs.
• Incorporate as closely as possible to the trees and shrubs without causing damage to their roots.

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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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