Herbicide Recommendations for Apples and Pears (Year of Planting):
Soil Applied Grass and Broadleaf Herbicides

Table of Contents

1. Casoron
2. Devrinol
3. Devrinol + Princep Nine-T
4. Devrinol + Sinbar
5. Dual II Magnum + Princep Nine-T
6. Lexone
7. Princep Nine-T
8. Sencor + Treflan or Bonanza
9. Sinbar
10. Treflan or Bonanza
11. From Tree Fruit Herbicide Rating Tables (Table 15-1) (PDF 110k)
    • Annual Grasses
    • Annual Broadleaf Weeds
    • Perennial Weeds
12. Other Apple and Pear Weed Control Recommendations
    • Year of Planting
      • Postemergent Grass Herbicides
      • Postemergence Broadleaf Herbicides
    • Established Planting
      • Soil Applied Grass Herbicides
      • Soil Applied Broadleaf Herbicides
      • Soil Applied Grass and Broadleaf Herbicides
      • Postemergence Grass Herbicides
      • Postemergence Broadleaf Herbicides
      • Postemergent Grass and Broadleaf Herbicides
13. Related Links

Precautions

• PRE - Apply to cool, moist soil in spring before weeds emerge or after cultivation.
• Do NOT apply if air temps are above 10-15°C to avoid injury from volatilization.
• Do NOT apply until 4 weeks after transplanting.
• Do NOT use on light sandy soils.
• 70 g of Casoron 4G applied to an area 2x2 m is equivalent to 175 kg/ha (70 kg/ac).

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Precautions

• PRE - Apply after planting trees, but before weeds emerge.
• Use a directed spray at low pressure.
• Incorporation by rainfall or irrigation is essential within 2 days of application.

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Precautions

• PRE - Apply in the fall through early spring before weeds emerge.
• Do NOT apply on frozen ground or during harvest.
• Make ONLY one application in the planting year.
• Incorporation by rainfall or irrigation is essential within 2 days of application.

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Precautions

• PRE - Apply in the fall through early spring before weeds emerge.
• Do NOT apply on frozen ground or during harvest.
• Make ONLY one application in the planting year.
• Incorporation by rainfall or irrigation is essential within 2 days of application.

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Precautions

• PRE - Apply post planting, before weeds emerge, preferably after rain has settled the soil around the trees.
• Apply once in the year of planting.
• Do NOT use on sandy soils with less than 2% organic matter.
• Avoid contact with tree trunks and leaves.

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Precautions

• PPI before planting trees.
• Make a single application as an orchard floor or planting row treatment.

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Precautions

• PRE - Apply post planting, preemergent to weeds, preferably after rain has settled the soil around the trees.
• Apply once per season.
• Avoid contact with trunk and leaves of trees.
• Do NOT use on sandy soils with less than 2% organic matter.

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Precautions

• PPI before planting trees as an orchard floor or planting row treatment.
• Apply once in the planting year ONLY.

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Precautions

• PRE - Apply after planting trees, before weeds emerge.
• Do NOT use on soils with less than 2% organic matter.
• Avoid contact with tree trunks and leaves.

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Precautions

• PPI - Apply and incorporate before planting trees.
• Apply once in the planting year ONLY.
• Use at least 100 L/ha water (40 L/ac).

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Related Links

• Weeds in Ontario
• Apple , Tender Fruit, Grapes 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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