Herbicide Recommendations for Carrots: Postemergence Grass Herbicides
Excerpt from 2010-2011 Chapter 13, Publication 75, Guide to Weed Control, Order this publication
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Table
of Contents| Trade Name | |
|---|---|
| Active Ingredient | fenoxaprop-p-ethyl |
| Formulation | 80.5 g/L |
| Rate per hectare (active) | 0.054 kg/ha |
| Rate per hectare (product) | 0.67 L/ha |
| Rate per acre (product) | 0.27 L/ac |
Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- Apply when majority of annual grasses are in the 1-6 leaf stage or until volunteer corn is up to 25 cm tall.
- Grasses emerging after application will not be controlled.
- Do NOT apply if rain is expected within one hour after application.
| Trade Name |
+ Merge
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|---|---|---|
| Active Ingredient |
sethoxydim
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+ surfactant/solvent
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| Formulation |
450 g/L
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| Rate per hectare (active) |
0.15 - 0.5 kg/ha
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1 - 2 L/ha
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| Rate per hectare (product) |
0.32 - 1.1 L/ha
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1 - 2 L/ha
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| Rate per acre (product) |
0.13 - 0.45 L/ac
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0.4 - 0.8 L/ac
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Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- Apply to actively growing grasses.
- For annual grass, use 0.32 L/ha. Apply at the 1-6 leaf stage (2-5 is optimum).
- For volunteer grains, use 0.47 L/ha. Apply at the 1-6 leaf stage (2-5 is optimum).
- For quackgrass, use 1.1 L/ha. Apply up to the 3 leaf stage. Thorough preplant tillage will ensure more uniform quackgrass emergence. Cultivate after 7 days in wide row crops. Use the high rate of MERGE for quackgrass.
- Use 100-200 L water/ha (40-80 L water/ac).
- Grasses emerging after application will not be controlled.
- Spray tips angled forward 45o will give better coverage.
- Do NOT use flood jet or hollow cone nozzles.
- Do NOT apply if rain is expected within one hour after application.
- Preharvest interval is 49 days.
Precautions (For more information, see Chapter 4. Herbicides Used in Ontario, page 23 and Chapter 5. Notes on Adjuvants, page 69).
- Apply when crop is 10 cm in height or less.
- Apply POST to actively growing grasses before tillering.
- Apply at 0.6 L/ha (0.24 L/ac) at 2-5 leaf stage of volunteer corn.
- Apply at 0.8 L/ha (0.32 L/ac) at 2-5 leaf stage of volunteer wheat and barley.
- Apply at 1 L/ha ( 0.4 L/ac) at 2-5 leaf stage of annual grasses (2-4 leaf for foxtails).
- Apply at 2 L/ha (0.8 L/ac) at 3-5 leaf stage of quackgrass & wirestem muhly.
- Thorough preplant tillage, fragmenting quackgrass rhizomes improves control
- Do NOT cultivate between rows until 5 days after application.
- Apply other postemergence herbicides separately at least 3 days after VENTURE L.
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E-mail: ag.info.omafra@ontario.ca
| Author: | OMAFRA Staff |
|---|---|
| Creation Date: | 25 November 2002 |
| Last Reviewed: | 02 July 2010 |