Herbicide Recommendations for Established Apples and Pears: Soil Applied Grass and Broadleaf Herbicides

Table of Contents

1. Casoron
2. Devrinol
3. Dual II Magnum + Lexone
4. Dual II Magnum + Princep Nine-T
5. Lorox
6. Princep Nine-T, Simadex or Simazine
7. Sinbar (Apples only)
8. Sinbar + Lexone
9. Tree Fruit Herbicide Rating Tables (Table 15-1) (PDF 110k)
   • Annual Grasses
   • Annual Broadleaf Weeds
   • Perennial Weeds
10. Other Apple and Pear Weed Control Recommendations
    • Year of Planting
      • Soil Applied Grass and Broadleaf Herbicides
      • Postemergent Grass Herbicides
      • Postemergence Broadleaf Herbicides
    • Established Planting
      • Soil Applied Grass Herbicides
      • Soil Applied Broadleaf Herbicides
      • Postemergence Grass Herbicides
      • Postemergence Broadleaf Herbicides
      • Postemergent Grass and Broadleaf Herbicides
11. 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.
• Do NOT use on light sandy soils.
• 70 g of Casoron 4G applied to an area 2 x 2 m is equivalent to 175 kg/ha (70 kg/ac).

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Precautions

• PRE - Apply in the fall through early spring before weeds emerge, but not on frozen ground.
• Avoid contact with fruit and foliage.
• Do NOT apply when fruit is on the ground during harvest.
• Incorporation by rainfall or irrigation is essential.

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Precautions

• PRE - Apply once per year as a band treatment under the trees before weeds emerge.
• Avoid contact with trunk and leaves of trees.
• Do NOT use on sandy soil with less than 2% organic matter.

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Precautions

• PRE - Apply once per year as a band treatment under the trees before weeds emerge.
• Avoid contact with trunk and leaves of trees.
• Do NOT use on sandy soil with less than 2% organic matter.
• Late season crabgrass and fall panicum may escape this treatment.

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Precautions

• PRE - Apply as directed spray before weeds are 10 cm high.
• Apply in 400-600 L/ha water (160-240 L/ac).
• Add a surfactant.
• Avoid contact with fruit, foliage or tree bark with spray or drift.
• Use ONLY under trees established at least 10 years.

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Precautions

• PRE - Apply in 300-1000 L/ha water (120-400 L/ac).
• Use only under trees planted for one year or more.
• Use higher rate on perennial weeds such as quackgrass.
• May be combined with glyphosate.

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Precautions

• PRE - Apply in 1000 L/ha water (400 L/ac).
• Use only under trees established for at least 3 years.

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Precautions

• PRE - Apply as a band under trees before weeds emerge.
• Use only one application per year.
• Do NOT use on soil coarser than sandy loams with less than 3% organic matter.

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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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