Herbicide Recommendations for Woody Nursery Stock (Container Grown): Soil Applied Grass and Broadleaf Herbicides
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Table
of Contents| Trade Name | |
|---|---|
| Active Ingredient | dichlobenil |
| Formulation | 4 Gr |
| Rate per hectare (active) | 4.4 kg/ha |
| Rate per hectare (product) | 110 kg/ha |
| Rate per acre (product) | 44 kg/ac |
Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- PRE - Apply at least 4 weeks after planting into containers to a weed-free soil surface.
- Do NOT use after September 15 or within 30 days of covering treated stock in overwintering structures.
- Use only on containers growing outside.
- For use on these species - Juniperus chinensis, J. horizontalis and Thuja occidentalis.
| 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 (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- 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 (1 cm) is needed to activate this herbicide.
| Trade Name |
or Devrinol 10G |
|
|---|---|---|
| Active Ingredient |
napropamide
|
or napropamide
|
| Formulation |
50 DF
|
10 Gr
|
| Rate per hectare (active) |
4.5 kg/ha
|
4.5 kg/ha
|
| Rate per hectare (product) |
9 kg/ha
|
45 kg/ha
|
| Rate per acre (product) |
3.6 kg/ac
|
18 kg/ac
|
Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- PPI - Apply at any time of the year to a weed-free soil surface.
- May be applied to newly planted container stock after the potting media has settled from first watering.
- Incorporate by watering within 7 days of a spring or fall application and within 2 days of a summer application.
- Will not control bittercress.
| Trade Name | |
|---|---|
| Active Ingredient | simazine |
| Formulation | 90 WG |
| Rate per hectare (active) | 2.25 kg/ha |
| Rate per hectare (product) | 2.5 kg/ha |
| Rate per acre (product) | 1 kg/ac |
Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- PRE - Apply in 300 L/ha (120 L/ac) water.
- For use on juniper, white cedar and yew ONLY.
- Apply ONLY once per season, 1 month after planting.
- Apply before weeds emerge or after removing them from the containers.
| Trade Name | |
|---|---|
| Active Ingredient | oxadiazon |
| Formulation | 2 Gr |
| Rate per hectare (active) | 2 - 4.5 kg/ha |
| Rate per hectare (product) | 100 - 225 kg/ha |
| Rate per acre (product) | 40 - 90 kg/ac |
Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- PRE - Apply any time during the year, prior to weed seed germination.
- Can be applied to both newly transplanted and established ornamentals and trees.
- Do NOT apply to wet foliage or under conditions in which granules will collect on leaves.
- Consult the label for list of tolerant species.
- Apply at least 4 weeks before covering polyhouses in fall.
Related Links
- Weeds in Ontario
- Nursery and Landscape Plants 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
For more information:
Toll Free: 1-877-424-1300
Local: (519) 826-4047
E-mail: ag.info.omafra@ontario.ca
| Author: | OMAFRA Staff |
|---|---|
| Creation Date: | 25 November 2002 |
| Last Reviewed: | 18 June 2010 |