PCP #33369 · Corteva Agriscience Canada Company · Herbicide
Group 2 herbicide containing rimsulfuron and nicosulfuron for post-emergent control of annual grasses and broadleaf weeds in field corn and lowbush blueberries. Has knockdown and soil residual activity. Absorbed through leaves and rapidly translocated to plant growing points. Rapidly stops growth of susceptible species with typical symptoms appearing within 5-7 days.
Crop × pest × application rate combinations from the official label. Rates converted to per-acre. PHI is the pre-harvest interval; REI is the restricted-entry interval. Always confirm against the official label PDF before applying.
| Crop | Target | Rate | PHI | REI |
|---|---|---|---|---|
| Blueberry | Annual grasses (1-6 leaves, up to tillering) | 16.2–26.9 g/acre | 420 d | – |
| Corn | Green Foxtail, Volunteer Canola including glyphosate tolerant varieties, Wild Oats, Volunteer Wheat | 16.2–26.9 g/acre | 30 d | 12 d |
| Corn | Green Foxtail, Volunteer Canola including glyphosate tolerant varieties, Wild Oats, Volunteer Wheat, Lamb's-quarters | 16.2–26.9 g/acre | 30 d |
| 12 d |
Adjuvant requirements, compatibility notes, and mixing restrictions from the official label. Always confirm against the official label PDF before mixing.
| Guidance | Adjuvant | Rate |
|---|---|---|
| Required | AGRAL® 90 NON-IONIC WETTING AND SPREADING AGENT For postemergence applications on corn, Steadfast IS Herbicide must be tank-mixed with a recommended non-ionic surfactant: Citowett Plus, Agral 90, or Ag-Surf at 2 L per 1000 L spray solution (0.2% v/v) | 2 L per 1000 L spray solution (0.2% v/v) |
| Required | CITOWETT PLUS For postemergence applications on corn, Steadfast IS Herbicide must be tank-mixed with a recommended non-ionic surfactant: Citowett Plus, Agral 90, or Ag-Surf at 2 L per 1000 L spray solution (0.2% v/v) | 2 L per 1000 L spray solution (0.2% v/v) |
| Required | HiActivate® NIS Conventional Corn: Must be tank-mixed with non-ionic surfactant at 2 L/1000 L (0.2% v/v) | 2 L/1000 L (0.2% v/v) |
| Required | IPCO Ag-Surf ORIGINAL For postemergence applications on corn, Steadfast IS Herbicide must be tank-mixed with a recommended non-ionic surfactant: Citowett Plus, Agral 90, or Ag-Surf at 2 L per 1000 L spray solution (0.2% v/v) | 2 L per 1000 L spray solution (0.2% v/v) |
| Required | NIS Steadfast IS Herbicide must be tank-mixed with a recommended non-ionic surfactant, either Citowett Plus, Agral 90 or Ag-Surf at 2 L per 1000 L spray solution (0.2% v/v). | 2 L per 1000 L spray solution (0.2% v/v) |
| Required | NIS Steadfast IS Herbicide must be tank-mixed with a non-ionic surfactant at 2L/1000L (0.2% v/v. | 2L/1000L (0.2% v/v) |
| Required | NIS apply 40-66.5 g/ha of Steadfast IS Herbicide with a recommended non-ionic surfactant (Citowett Plus, Agral 90 or Ag-Surf) at 2.0 litres per 1,000 litres of spray solution (0.2%v/v). | 2.0 litres per 1,000 litres of spray solution (0.2% v/v) |
| Recommended | surfactant Apply Steadfast IS at 40 – 66.5 grams/ha as a broadcast spray, with a recommended surfactant to corn and weeds | – |
| Compatible | HiActivate® NIS When tank-mixed with glyphosate herbicide, non-ionic surfactant is not required | – |
| Do not mix | organophosphorus insecticides DO NOT tank mix with organophosphorus insecticides; DO NOT apply foliar organophosphorus insecticide within 7 days before or after applying Steadfast IS Herbicide | – |
| Do not mix | products containing the same active ingredient DO NOT tank mix products containing the same active ingredient unless specifically listed on label | – |
| Do not mix | Non-ionic surfactant when tank-mixed with glyphosate When Steadfast IS Herbicide is tank-mixed with a glyphosate herbicide, a non-ionic surfactant is not required. | – |
About this content. This page presents the official PRD label as published by Health Canada's Pesticides Regulatory Directorate (formerly the Pest Management Regulatory Agency), the source of record. Always read the official label and consult your provincial pesticide- application authority before use. Report an error.
