Herbicide Recommendations for Turfgrass: Preemergence Grass Herbicides

Table of Contents

1. Betasan
2. Dacthal W-75
3. Dimension
4. Turfgrass Herbicide Rating Table (Table 17-1) (PDF 15k)
5. Other Turfgrass Weed Control Recommendations
   • Site Preparation Before Turfgrass Establishment
   • Inhibitors of Smooth Crabgrass and Dandelion Seed Germination
   • Postemergence Grass Herbicides
   • Postemergence Broadleaf Herbicides
   • Turfgrass Renovation
   • Turfgrass Retardation
6. Related Links

Precautions

• PRE - Apply to established turf before crabgrass emergence in early spring, or in fall.
• Use the low rate for crabgrass and the high rate for annual bluegrass.
• Do NOT reseed the area for one year following treatment.
• Do NOT apply peatmoss to lawn before application.
• Use on mineral soils ONLY.

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Precautions

• PRE - Apply early in spring before weed seed germination.
• Apply in 450 to 1100 L/ha (180 to 440 L/ac) of water.
• Do NOT apply to Cohansey and Toronto bent.
• Do NOT reseed for 60 days after application.

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Precautions

• PRE - Apply in established turf before crabgrass emergence.
• See POST application.
• Apply in 200-800 L/ha (80-160 L/ac) water.
• Allow turf to recover from aeration, or other stresses before application.
• Do NOT apply to putting greens during the first year of establishment.
• Check label for sensitive varieties, including Colonial bentgrasses.
• Do NOT irrigate within 2 hr. of application.
• Do NOT reseed for 3 months after application.
• May be tankmixed with Killex or other broadleaf herbicides.
• Do NOT tank-mix with other products for application to putting greens.

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Related Links

• Weeds in Ontario
• Turfgrass in Ontario
• 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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