Herbicide Recommendations for
Forage Legumes (Established):
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Pub 75: Guide to Weed Control > Forage Crops > Herbicide Recommendations for Forage Legumes (Established): Postemergence Grass and Broadleaf Herbicides |
Excerpt from 2010-11 Publication 75, Guide to Weed Control, Order this publication
Table
of Contents
- Glyphosate
- Gramoxone
- Pursuit + non-ionic surfactant + liquid fertilizer
- Simadex, Princep Nine-T or Simazine 80W
- Forage Crops Herbicide Weed Control Ratings (Table 10-1) (PDF file - 64 kb)
- Other Forage Crops Weed Control Recommendations
- Forage Legumes (Direct Seeded, POST Broadleaf or Grass Herbicides or Preharvest)
- Forage Sorghum and Forage Millet
- Pasture Renovation with Bird's-foot Trefoil
- Pastures (mostly grasses)
- Stages of Leaf Development
- Related Links
| Trade Name | glyphosate |
or glyphosate
|
or glyphosate |
or glyphosate |
or glyphosate |
|---|---|---|---|---|---|
| Active Ingredient |
glyphosate*
|
or glyphosate*
|
or glyphosate*
|
or glyphosate*
|
or glyphosate*
|
| Formulation |
360 g/L
|
450 g/L
|
480 g/L
|
500 g/L
|
540 g/L
|
| Rate per hectare (active) |
1.71 to 4.32 kg/ha
|
1.71 to 4.32 kg/ha
|
1.71 to 4.32 kg/ha
|
1.71 to 4.32 kg/ha
|
1.71 to 4.32 kg/ha
|
| Rate per hectare (product) |
4.75 to 12 L/ha
|
3.8 to 9.6 L/ha
|
3.56 to 9 L/ha
|
3.42 to 8.64 L/ha
|
3.17 to 8 L/ha
|
| Rate per acre (product) |
1.7 to 4.8 L/ac
|
1.52 to 3.84 L/ac
|
1.42 to 3.6 L/ac
|
1.38 to 3.5 L/ac
|
1.27 to 3.2 L/ac
|
Precautions
- SPOT TREATMENT ONLY: Apply when field bindweed has reached full bloom and other weeds are in the bud to full bloom stage.
- Do NOT graze or harvest forage from treated spots until the treated plants turn brown.
| Trade Name | |
|---|---|
| Active Ingredient | paraquat |
| Formulation | 200 g/L |
| Rate per hectare (active) | 0.56 to 1.1 kg/ha |
| Rate per hectare (product) | 2.8 to 5.5 L/ha |
| Rate per acre (product) | 1.12 to 2.2 L/ac |
Precautions
- Apply to trefoil seed fields when the crop is about 15 cm high in the spring.
- Apply to alfalfa or trefoil forage fields within 5 days after cutting.
- Slow recovery and stand reduction has been observed under conditions of drought or high temperatures.
- Do NOT use in the spring after treatment with simazine.
| Trade Name |
+ 10-34-0, 28-0-0 or 32-0-0
|
||
|---|---|---|---|
| Active Ingredient |
imazethapyr
|
+ non-ionic surfactant
|
+ liquid fertilizer
|
| Formulation |
240 g/L
|
|
|
| Rate per hectare (active) |
0.075 to 0.1 kg/ha
|
0.25% v/v
|
2 L/ha
|
| Rate per hectare (product) |
0.312 to 0.42 L/ha
|
2.5 L/1000 L
|
2 L/ha
|
| Rate per acre (product) |
0.125 to 0.168 L/ac
|
2.5 L/1,000 L
|
0.8 L/ac
|
Precautions
- Apply only after the crop has one fully developed trifoliate leaf.
- For seed alfalfa only.
- One application per year. Apply early postemergence when weeds are less than 7.5 cm (3 in.) tall.
- Apply in 200 L/ha (80 L/ac) water.
| Trade Name | |||
|---|---|---|---|
| Active Ingredient |
simazine
|
or simazine
|
or simazine
|
| Formulation |
500 g/L
|
90 WG
|
80 WP
|
| Rate per hectare (active) |
1.1 kg/ha
|
1.1 kg/ha
|
1.1 kg/ha
|
| Rate per hectare (product) |
2.2 L/ha
|
1.22 kg/ha
|
1.38 kg/ha
|
| Rate per acre (product) |
0.88 L/ac
|
0.49 kg/ac
|
0.55 kg/ac
|
Precautions
- Apply in September to November before freeze up.
- This treatment prevents legume seedlings from establishing for approximately 8 months.
- Do NOT use Simadex on alfalfa.
- Do NOT use in the fall before seeding another crop.
- Do NOT apply Gramoxone within one 1 year after simazine application.
- Do NOT apply to the same field for more than 3 consecutive years.
- Allow 30 days between applications and grazing cattle or sheep.
Related Links
- on general Weed topics
- on general Forage and Pasture topics
- on pesticide labels, search the PMRA website
- on weed identification, order OMAFRA Publication 505: Ontario Weeds
- on weed control, order 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 |