Herbicide Recommendations for Corn: Soil Applied Broadleaf Herbicides (Preemergence Timing Only)
Excerpt from 2010-11 Chapter 9, Publication 75, Guide to Weed Control, Order this publication
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Table
of Contents| Trade Name | |
|---|---|
| Active Ingredient | atrazine |
| Formulation | 480 g/L |
| Rate per hectare (active) | 1.01 to 1.49 kg/ha |
| Rate per hectare (product) | 2.1 to 3.1 L/ha |
| Rate per acre (product) | 0.84 to 1.25 L/ac |
Precautions
- Weeds will normally emerge and die within a few days; atrazine can persist for varying lengths of time; longer under dry, cool weather and coarse textured soils. See tank-mixes for reducing rates and avoiding residues, and for treatments to provide annual grass control.
- Can be tank-mixed with glyphosate or Gramoxone for PP burndown of emerged annual and perennial weeds, see Chapter 6, for more information.
| Trade Name | Atrazine | + Banvel II or Oracle |
|---|---|---|
| Active Ingredient |
atrazine
|
+ dicamba
|
| Formulation |
480 g/L
|
480 g/L
|
| Rate per hectare (active) |
1.01 to 1.49 kg/ha
|
0.6 kg/ha
|
| Rate per hectare (product) |
2.1 to 3.1 L/ha
|
1.25 L/ha
|
| Rate per acre (product) |
0.84 to 1.24 L/ac
|
0.5 L/ac
|
Precautions
- Do NOT use on seed corn or sweet corn.
- This treatment should provide good control of triazine resistant broadleaf weeds and velvetleaf.
- See notes on atrazine with respect to residues.
- See precautions for Banvel Il or Oracle applied alone.
- Do NOT apply to coarse (sand) textured soils with less than 2% organic matter.
| Trade Name | |
|---|---|
| Active Ingredient | dicamba |
| Formulation | 480 g/L |
| Rate per hectare (active) | 0.6 kg/ha |
| Rate per hectare (product) | 1.25 L/ha |
| Rate per acre (product) | 0.5 L/ac |
Precautions
- If corn seed is less than 4 cm below the soil surface, delay application of Banvel II until the spike stage of corn.
- Apply to medium to fine textured soils containing more than 2.5% organic matter.
- Do NOT apply to coarse (sand) textured soils with less than 2% organic matter.
- Do NOT incorporate.
Precautions
- Apply PRE to field corn, seed or sweet corn
| Trade Name |
Marksman
or Propero
|
|---|---|
| Active Ingredient | dicamba/ atrazine |
| Formulation | 393 g/L |
| Rate per hectare (active) | 1.5 to 1.8 kg/ha |
| Rate per hectare (product) | 3.7 to 4.5 L/ha |
| Rate per acre (product) | 1.5 to 1.8 L/ac |
Precautions
- Do NOT use on seed corn or sweet corn.
- See notes on atrazine with respect to residues,
- See precautions for Banvel II applied alone.
- Do NOT apply to coarse (sand) textured soils with less than 2% organic matter.
Related Links
- Weeds in Ontario
- Corn in Ontario
- Problem Weed Control in Field Crops
- 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: | 30 January 2010 |