Herbicide Recommendations for Highbush Blueberries (Established Plantings): Soil Applied Grass and Broadleaf Herbicides

Excerpt from 2008 Chapter 14, Publication 75, Guide to Weed Control, Order this publication

Table of Contents

1. Casoron
2. Devrinol
3. Princep Nine-T or Simazine
4. Sinbar
5. Cane and Bush Berries Herbicide Ratings:
   from Tree Fruit Herbicide Rating Tables (Table 15-1) (PDF 101k)
   • Annual Grasses
   • Annual Broadleaf Weeds
   • Perennial Weeds
6. Other Highbush Blueberry Control Recommendations
   • Year of Planting
     • Soil Applied Grass and Broadleaf Herbicides
     • Postemergence Grass Herbicides
     • Postemergence Broadleaf Herbicides
     • Postemergence Grass and Broadleaf Herbicides
   • Established Planting
     • Postemergence Grass Herbicides
     • Postemergence Broadleaf Herbicides
     • Postemergence Grass and Broadleaf Herbicides
7. Related Links

Precautions

• PRE - Apply to cool moist but unfrozen soil in late fall or spring before weeds emerge.
• Do NOT apply if air temps are above 10-15°C to avoid injury from volatilization.
• Use the lower rate if irrigation or rain will follow application.
• 70 g Casoron 4G applied to an area 2x2 m is equivalent to 175 kg/ha (70 kg/ac).
• Use ONLY under plants established for at least 3 yrs.
• Do NOT use on light, sandy soil.

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Precautions

• PRE - Apply once per season, either in the fall or spring, before weeds emerge.
• Incorporation by rainfall or irrigation is essential.
• Do NOT apply to frozen ground.
• Do NOT apply within 70 days of harvest.

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Precautions

• PRE - Apply in 300-1000 L/ha water (120-400 L/ac) before weed emergence.
• Use lower rates for coarse, sandy soil.
• Use higher rates for clay or higher organic matter soil.
• Use only on established plants.

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Precautions

• PRE - Apply in 200-1000 L/ha water (80-400 L/ac).
• Use only in plantings established in the field for at least 1 year.
• Make one application per year.
• Injury may occur on sandy soil even with the low rate.
• Use the high rate only on muck or peat soils where experience has shown this to be a safe practice.

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Related Links

• Weeds in Ontario
• Berries 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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