Herbicide Recommendations for Strawberries: 2 to 4 Weeks After Planting

Table of Contents

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

Soil Applied Grass and Broadleaf Herbicides

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

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Precautions

• PRE - Apply once per season before weeds emerge or following a cultivation.
• Incorporation by rainfall, irrigation or cultivation is essential.
• Where daughter plant establishment is important, (e.g., for plant producers) delay application until desired number of daughter plants have been established.
• Inhibition of daughter plant roots can occur where soil moisture is low and will be minimized if irrigation is applied shortly after application.

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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 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 100-200 L water/ha (40-80 L water/ac).
• Grasses emerging after application will not be controlled.
• Spray tips angled forward 45° will give better coverage.
• Do NOT use flood jet or hollow cone nozzles.
• Do NOT apply if rain is expected within one hour after application
• Do NOT apply closer than 25 days to harvest
• Wait at least 14 days after application before applying Sinbar

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Precautions

• Apply POST to actively growing grasses before tillering
• 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 2-5 leaf stage of annual grasses (2-4 leaf for foxtails).
• Apply at 2 L/ha (0.8 L/ac) at 3-5 leaf stage of quackgrass and 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.

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Postemergence Broadleaf Herbicides

2,4-D

Trade Name	2,4-D	or 2,4-D	or 2,4-D
Active Ingredient	2,4-D	or 2,4-D	or 2,4-D
Formulation	470 g/L	564 g/L	660 g/L
Rate per hectare (active)	0.55 kg/ha	0.55 kg/ha	0.55 kg/ha
Rate per hectare (product)	1.17 L/ha	0.98 L/ha	0.83 L/ha
Rate per acre (product)	0.47 L/ac	0.47 L/ac	0.47 L/ac


Precautions
• Use the amine formulation.
• Apply in 100-200 L/ha of water (40-80 L/ac).
• Use low pressure and a coarse spray to minimize risk of spray drift to susceptible crops.
• Do NOT use while early runners are rooting.
• Do NOT use between mid-August and fall dormancy when flower buds are developing for next year's crop.

 

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Aim EC + Agral 90 or Ag-Surf or + Merge

Trade Name	Aim EC	+ Agral 90 or Ag-Surf	or + Merge
Active Ingredient	carfentrazone-ethyl	+ non-ionic surfactant	or + surfactant/solvent
Formulation	240 g/L
Rate per hectare (active)	17.5 to 35 g/ha	0.25 %v/v	0.1 %v/v
Rate per hectare (product)	37 to 117 mL/ha	2.5 L/1000 L	1 L/1000 L
Rate per acre (product)	14 to 28 g/ac	2.5 L/1000 L	1 L/1000 L

Precautions

• Apply POST with a HOODED SPRAYER between the rows or between the plastic mulch.
• Apply to actively growing weed up to 10 cm tall.
• Apply in a minimum of 100 L/ha (40 L/ac) water.
• Do NOT apply closer than 1 day to harvest.
• Apply ONLY once per growing season
• Aim EC may cause crop injury if the spray is allowed to come in contact with the green stem, leaves, bloom or fruit.
  

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Postemergence Grass and Broadleaf Herbicides

Glyphosate (wick wiper)

Trade Name	glyphosate	or glyphosate	or glyphosate	or glyphosate
Active Ingredient	glyphosate	or glyphosate	or glyphosate	or glyphosate
Formulation	360 g/L	480 g/L	500 g/L	540 g/L
Rate per hectare (active)	0.36 kg/2 L (33% solution)	0.36 kg/2 L (33% solution)	0.36 kg/2 L (33% solution)	0.36 kg/2 L (33% solution)
Rate per hectare (product)	1L/2 L water	0.75 L/2 L of water	0.72 L/2 L of water	0.67 L/2 L of water


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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Glyphosate (spot spray)

Trade Name	glyphosate	or glyphosate	or glyphosate	or glyphosate
Active Ingredient	glyphosate	or glyphosate	or glyphosate	or glyphosate
Formulation	360 g/L	480 g/L	500 g/L	540 g/L
Rate per hectare (active)	0.36 to 0.72 kg/100 L (1 to 2% solution)	0.36 to 0.72 kg/100 L	0.36 to 0.72 kg/100 L	0.36 to 0.72 kg/100 L
Rate per hectare (product)	1 to 2 L/100 L water	0.75 to 1.5 L/100 L water	0.72 to 1.44 L/100 L water	0.67 to 1.34 L/100 L water

Precautions

• Use hand held sprayers as 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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