Herbicide Recommendations for Strawberries: Spring After Mulch Removal

Table of Contents

1. Soil Applied Grass and Broadleaf Herbicides
   • Dacthal
   • Devrinol
   • Sinbar
2. Postemergence Grass Herbicides
   • Venture L
   • Poast Ultra + Merge
3. Postemergence Grass and Broadleaf Herbicides
   • Glyphosate (wick wiper)
   • Glyphosate (spot spray)
4. Strawberry Herbicide Rating Tables (Table 14-1) (PDF 24k)
   • Annual Grasses
   • Annual Broadleaf Weeds
   • Perennial Weeds
5. Other Strawberry Weed Control Recommendations
• First (Planting) Year
• Before Planting
• 2 to 4 Weeks After Planting
• 4 to 6 Weeks After Planting
• Late Summer/Fall (Labour Day)
• Late Fall
• Harvesting Year
• Renovation
• Late Summer/Fall (Labour Day)
• Late Fall
6. Related Links

Soil Applied Grass and Broadleaf Herbicides

Precautions

• PRE - before weed emergence.
• Shallow cultivation to incorporate herbicide into the soil surface may improve weed control.
• Do NOT apply from first bloom to harvest.
• Do NOT use on muck soil.

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Precautions

• PRE - Apply to weed free soil just after mulch is removed, but not on frozen ground.
• Incorporation by rainfall or irrigation is essential.
• Do NOT apply from bloom to harvest.
• Do NOT apply more than once per season.

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Precautions

• PRE - Apply to weed free soil just after mulch is removed.
• Apply in at least 300 L/ha water (120 L/ac).
• If strawberry plants have made weak yellow growth under the mulch, wait 5-7 days until plants recover before applying Sinbar.
• Use low rate where Sinbar was used in the fall.
• Use lower rate on sandy soils low in organic matter.
• Use lower rate on sensitive varieties such as Kent, Bounty, Micmac, Annapolis, Glooscap and Cavendish since they may be severely injured.
• Do NOT apply to weak or diseased plants of any variety.
• Do NOT overlap spray swaths. Calibrate sprayer accurately.

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Postemergence Grass Herbicides

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. Always use appropriate drift management technology.

Precautions

• Apply before bloom to actively growing grasses.
• Apply at 0.6 L/ha (0.24 L/ac) at 2-5 leaf stage of volunteer corn.
• Apply at 0.8 L/ha (0.32 L/ac) at 2-5 leaf stage of volunteer wheat and barley.
• Apply at 1 L/ha (0.4 L/ac) at the 2-5 leaf stage of annual grasses (2-4 leaf for foxtails).
• Apply at 2 L/ha (0.8 L/ac) at the 3-5 leaf stage of quackgrass & wirestem muhly. Thorough preplant tillage will ensure more uniform quackgrass emergence. Cultivate after 7 days.
• Use ONLY one application per season.
• Wait at least 14 days after application before applying Sinbar.
• Do NOT apply closer than 30 days to harvest.

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Precautions

• Apply to actively growing grasses.
• For annual grass, use 0.32 L/ha. Apply at the 1-6 leaf stage (2-5 is optimum).
• For volunteer grains, use 0.47 L/ha. Apply at the 1-6 leaf stage (2-5 is optimum).
• For quackgrass, use 1.1 L/ha. Apply up to the 3-leaf stage. Thorough preplant tillage will ensure more uniform quackgrass emergence. Cultivate after 7 days. Use the high rate of Merge for quackgrass.
• Use 100 to 200 L water/ha (40 to 80 L water/ac).
• Grasses emerging after application will not be controlled.
• Spray tips angled forward 45^o will give better coverage.
• Do NOT use flood jet or hollow cone nozzles.
• Do NOT apply if rain is expected within 1 hour after application.
• Wait at least 14 days after application before applying Sinbar.
• Do NOT apply closer than 25 days to harvest.

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Postemergence Grass and Broadleaf Herbicides

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. Always use appropriate drift management technology.

Precautions

• Apply with a rope wick or other similar device when weeds are 15 cm above the crop.
• Avoid contact with the strawberry plants.
• Do NOT apply when weeds are wet.
• See Chapter 2, Wiper Applicators for Selective Weed Control.

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Precautions

• Use hand held sprayers for a spot treatment if wiper equipment is not available.
• Avoid contact with strawberry plant - crop in the treated area will be killed.
• Do NOT apply closer than 30 days before harvest.

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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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