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Herbicide Recommendations for Herbaceous Ornamentals: Soil Applied Grass and Broadleaf Herbicides

Author: OMAFRA Staff
Creation Date: 25 November 2002
Last Reviewed: 20 June 2008

Pub 75: Guide to Weed Control > Nursery and Ornamental Crops > Herbicide Recommendations for Herbaceous Ornamentals: Soil Applied Grass and Broadleaf Herbicides


Excerpt from 2008 Chapter 16, Publication 75, Guide to Weed Control, Order this publication

Cover of Publication 75, Guide to Weed ControlTable of Contents

  1. Dacthal W-75
  2. CIPC EC or CIPC
  3. Treflan or Rival or Bonanza
  4. Nursery and Ornamental Herbicide Rating Table (Table 16-1) (PDF 63k)
  5. Other Herbaceous Ornamental Weed Control Recommendations
  6. Related Links
Dacthal W-75
Trade Name
Active Ingredient chlorthal dimethyl
Formulation 75 WP
Rate per hectare (active) 12.75 kg/ha
Rate per hectare (product) 17 kg/ha
Rate per acre (product) 6.8 kg/ac

Precautions

  • Apply at lining out, late fall or early spring in 340 L of water
  • Applications should be made to soil recently cultivated to a uniform texture.
  • Rain or irrigation (cm) is needed to activate this herbicide
  • Do NOT use on Germander, Telanthera, Ajuga, Mesembryanthemum, Dianthus, Viola Phlox and Vinca minor.
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CIPC EC or CIPC
Trade Name

or CIPC
Active Ingredient
chlorpropham
or chlorpropham
Formulation
480 g/L
20 Gr
Rate per hectare (active)
5.577 kg/ha
5.577 kg/ha
Rate per hectare (product)
11.6 L/ha
27.5 kg/ha
Rate per acre (product)
4.64 L/ac
11 kg/ac

Precautions

  • PRE - May be applied either PRE or POST to crop.
  • Particularly effective against purslane.
  • Apply after a clean cultivation, when the soil is moist, in 200-400 L/ha (80-160 L/ac) water.

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Treflan or Rival or Bonanza
Trade Name

or Rival

or Bonanza
Active Ingredient
trifluralin
or trifluralin
or trifluralin
Formulation
480 g/L
500 g/L
400 g/L
Rate per hectare (active)
0.6 to 1.155 kg/ha
0.6 to 1.155 kg/ha
0.6 to 1.155 kg/ha
Rate per hectare (product)
1.25 to 2.4 L/ha
1.2 to 2.2 L/ha
1.5 to 2.75 L/ha
Rate per acre (product)
0.5 to 0.96 L/ac
0.48 to 0.94 L/ac
0.6 to 1.1 L/ac

Precautions

  • PPI - must be incorporated before transplanting.
  • Do NOT use for seeded annuals.
  • Check label for list of tolerant species.
  • Check label for application rate as it varies with soil type.

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