Herbicide Recommendations for Corn: Postemergence Grass Herbicides
Excerpt from 2010-11 Chapter 9, Publication 75, Guide to Weed Control, Order this publication
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Table
of Contents| Trade Name | Accent | + non-ionic surfactant | + liquid urea ammonium nitrate (UAN) |
|---|---|---|---|
| Active Ingredient |
nicosulfuron
|
+ non-ionic surfactant
|
+ liquid urea ammonium
|
| Formulation |
75 DF
|
|
|
| Rate per hectare (active) |
25 g/ha
|
0.2% v/v
|
5 L/ha
|
| Rate per hectare (product) |
33 g/ha
|
2 L/1000 L
|
5 L/ha
|
| Rate per acre (product) |
13 g/ac
|
2 L/1000 L
|
2 L/ha
|
Precautions
- Do NOT add liquid urea ammonium nitrate (UAN) when applying ACCENT to seed or sweet corn.
- For use on all sweet corn varieties, however, not all varieties have been tested. Contact the variety manufacturer for more information on the tolerance of a specific variety.
- Adding UAN will give improved control of yellow foxtail in Field Corn.
- Adapt oil concentrate (1% v/v), Merge or Sure-Mix (0.5% v/v) can be used in place of a non-ionic surfactant (Field Corn only)
- Always add water soluble packages to clean water with the agitator running. Corn should be within the 1-8 leaf stage of growth. Apply Accent when annual grasses are in the 1-6-leaf stage and/or quackgrass is in the 3-6 leaf stage.
| Trade Name | Ultim | + non-ionic surfactant |
|---|---|---|
| Active Ingredient |
nicosulfuron/rimsulfuron
|
+ non-ionic surfactant
|
| Formulation |
75 DF (1:1)
|
|
| Rate per hectare (active) |
25 g/ha
|
0.2% v/v
|
| Rate per hectare (product) |
33 g/ha
|
2 L/1000 L
|
| Rate per acre (product) |
13 g/ac
|
2 L/1000 L
|
Precautions
- Do NOT use on seed corn or sweet corn.
- Always add water soluble packages to clean water with the agitator running. Corn should be within the 1-6 leaf stage. Apply ULTIM when annual grasses are in the 1-6 leaf stage, and quackgrass is in the 3-6 leaf stage.
- ONLY apply Ultim when air temperatures in the 24 hours before and after application ranges between 5ºC and 28ºC .
Related Links
- Weeds in Ontario
- Corn 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: | 30 January 2010 |