Herbicide Recommendations for Soybeans: Preharvest
Excerpt from 2010-11 Chapter 11, Publication 75, Guide to Weed Control, Order this publication
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Table
of Contents| Trade Name |
+ non-ionic surfactant
|
or Merge
|
|
|---|---|---|---|
| Active Ingredient |
carfentrazone-ethyl
|
+ non-ionic surfactant
|
or merge
|
| Formulation |
240 g/L
|
|
|
| Rate per hectare (active) |
0.0175 to 0.028 kg/ha
|
0.25% v/v
|
0.1% v/v
|
| Rate per hectare (product) |
0.073 to 0.117 L/ha
|
2.5 L/1,000L
|
10 L/1,000
|
| Rate per acre (product) |
30 to 47 mL/ac
|
2.5 L/1,000L
|
10 L/1,000L
|
Precautions
- Apply to actively growing weeds, up to 10cm
- Coverage of weed and crop foliage is essential for control
- Preharvest interval (PHI) is 3 days.
| Trade Name |
+ Agral
90
|
|
|---|---|---|
| Active Ingredient |
diquat
|
+ surfactant
|
| Formulation |
240 g/L
|
|
| Rate per hectare (active) |
0.30 to 0.55 kg/ha
|
0.1% v/v
|
| Rate per hectare (product) |
1.25 to 2.3 L/ha
|
1 L/1000 L
|
| Rate per acre (product) |
0.5 to 0.92 L/ac
|
1 L/1000 L
|
Precautions
- Apply in 225 L/ha water to burn off weeds when 80% natural crop leaf defoliation has occurred and 80% of the pods have turned yellow.
- Avoid regrowth by targeting spray within 7 days of variety maturity date and harvest 5-7 days after application.
- For ground application use 1.25-1.7 L/ha (0.5-0.68 L/ac).
- For aerial application use 1.7-2.3 L/ha (0.68-0.92 L/ac).
- Beware of drift to adjacent crops or plants.
| Trade Name | |
| Active Ingredient |
glyphosate*
|
| Rate per hectare (active) |
0.9 kg/ha
|
| Rate per hectare (product) |
See Table
11-5
|
| Rate per acre (product) |
See Table
11-5
|
Precautions
- Apply in 50-100 L/ha (20-40 L/ac) water when the crop is 30% grain moisture or less.
- Do NOT apply to crops grown for seed.
- Apply at least 7 days prior to harvest when pod tissue is dry and brown and 80-90% of original leaves have dropped.
Related Links
- Weeds in Ontario
- Soybeans 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 |