Herbicide Recommendations for Established Apples and Pears: Postemergence Grass and Broadleaf Herbicides

Table of Contents

1. Amitrol (Apples only)
2. Glyphosate
3. Glyphosate (wick wiper)
4. Glyphosate (spot spray)
5. Gramoxone
6. Gramoxone + Devrinol
7. Gramoxone + Princep Nine-T
8. Ignite
9. Ignite + Princep Nine-T or Simadex
10. Lorox
11. Princep Nine-T + or glyphosate
12. Tree Fruit Herbicide Rating Tables (Table 15-1) (PDF 110k)
    • Annual Grasses
    • Annual Broadleaf Weeds
    • Perennial Weeds
13. 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
      • Soil Applied Grass and Broadleaf Herbicides
      • Postemergence Grass Herbicides
      • Postemergence Broadleaf Herbicides
14. Related Links

Precautions

• For all emerged weeds including poison ivy.
• Spray to wet entire weed to the ground after foliage has fully developed.
• Keep spray off tree trunks as much as possible.
• Do NOT apply closer than 30 days before harvest.

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Precautions

• For actively growing weeds.
• Apply in 200-300 L/ha water (80-120 L/ac) as a directed spray.
• Remove all suckers from base of trunks before application.
• Do NOT apply to trees with "green" bark in the area of application.
• Do NOT mow or till weeds for at least 5-7 days after application. Wait longer if cool.
• Only weeds emerged at application time will be controlled. Additional weed control programs will be necessary to control weeds germinating later.
• Repeat application to regrowth may be necessary for complete control.
• Do NOT apply closer than 30 days to harvest.
• For specific information on product rates and notes for annual and perennial weed control refer to Table 4-2, page 59.

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Precautions

• Apply with a rope wick or other similar device when weeds are at the optimum stage.
• Avoid contact with the leaves, trunks and suckers.
• Do NOT apply when weeds are wet.
• See Chapter 2, Wiper Applicators for Selective Weed Control
• Do NOT apply closer than 30 days to harvest.

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Precautions

• Use hand held sprayers as a spot treatment if wiper equipment is not available.
• Avoid contact with leaves, trunks and suckers.
• Do NOT apply closer than 30 days before harvest.

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Precautions

• Apply in 1100 L/ha (440 L/ac) water.
• For spot spraying, apply 55 mL in 10 L of water sprayed to wet weed foliage.
• Use on trees established one year or more.
• Avoid contact with green bark, leaves or fruit.
• May be used in mixtures with Sinbar, Devrinol or simazine.

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Precautions

• Add Devrinol to tank first then agitate and add Gramoxone.
• Apply in 1100 L/ha water (440 L/ac).
• Use on trees established one year or more.
• Avoid contact with green bark, leaves or fruit.

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Precautions

• To control emerged weeds and provide residual control of germinating weeds.
• Use on trees established one year or more.
• Avoid contact with green bark, leaves or fruit.
• See Precautions on Gramoxone and Princep.

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Precautions

• Apply as a directed spray before weeds are 30 cm high.
• Use 110 to 330 L/ha water (44-132 L/ac).
• Where weed growth is heavy, use the higher rate and larger water volume.
• Do NOT apply closer than 40 days to harvest.
• For trees established at least one year.

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Precautions

• To control emerged weeds plus residual control of annual grasses and broadleaf weeds.
• Use as a directed spray around the bases of trees established at least one year.
• Do NOT apply closer than 40 days to harvest.

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Precautions

• 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

• To control actively growing weeds, with residual control of germinating weeds.
• Apply in 200-300 L/ha water (80-120 L/ac) as a directed spray.
• Remove all suckers from base of trunks before application.
• Do NOT apply to trees with "green" bark in the area of application.

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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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