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

Table of Contents

1. Introduction
2. Glyphosate
3. Gramoxone
4. Gramoxone + Princep Nine-T
5. Cane and Bush Berries Herbicide Ratings:
   from Tree Fruit Herbicide Rating Tables (Table 15-1) (PDF 110k)
   • Annual Grasses
   • Annual Broadleaf Weeds
   • Perennial Weeds
6. Other Highbush Blueberry Weed Control Recommendations
   • Year of Planting
     • Soil Applied Grass and Broadleaf Herbicides
     • Postemergence Grass Herbicides
     • Postemergence Broadleaf Herbicides
     • Postemergence Grass and Broadleaf Herbicides
   • Established Planting
     • Soil Applied Grass and Broadleaf Herbicides
     • Postemergence Grass Herbicides
     • Postemergence Broadleaf Herbicides
7. Related Links

Introduction

Postemergence - Leaf stage of the weeds is critical for good weed control. Smaller weeds are generally easier to kill but there needs to be enough leaf surface to intercept the herbicide. Apply according to recommended leaf stages. Crop stage is important to optimize crop safety. Adjuvants will frequently improve the weed control when used as directed. Weather or other conditions may influence the optimum rate of adjuvant, see the product label for more details. Always use appropriate drift management technology.

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Precautions

• Apply as a directed spray under the bushes, avoiding new shoots.
• Apply in 200-300 L/ha water (80-120 L/ac), using no more than 275 kPa pressure.
• Avoid contact with fruit, foliage or canes.
• Use only one application per season.
• Do NOT apply closer than 30 days to harvest.

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Precautions

• Apply in 1000 L/ha water (400 L/ac).
• For spot spraying, apply 55 mL product/10 L water sprayed to wet weed foliage.
• Use on plantings established at least one year.

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Precautions

• For emerged weeds with residual control of germinating weeds.
• Apply as a directed spray to established plantings.
• Use 1000 L/ha water (400 L/ac) to wet weed foliage.
• Use lower rates for coarse, sandy soil.
• Use higher rates for clay or higher organic matter soil.

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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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