PCP #31039 · Corteva Agriscience Canada Company · Herbicide
Group 4 soluble granular clopyralid herbicide for control of perennial and annual broadleaved weeds (especially Canada thistle, wild buckwheat, scentless chamomile, common groundsel and volunteer alfalfa) in field crops, Christmas tree plantations, pasture, rangeland, vegetable and fruit crops, and non-cropland.
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 |
|---|---|---|---|---|
| Apple | Perennial vetch species | 113 g/acre | 30 d | 12 d |
| Balsam Fir | Vetch (Vicia spp.) | 85 g/acre | – | 12 d |
| Barley | Canada thistle, common groundsel, perennial sow-thistle (top growth control), wild buckwheat, scentless chamomile, volunteer alfalfa | 85–113 g/acre | – | 12 d |
| Blueberry | Red and white clover | 168 g/acre | 45 d | 12 d |
| Blueberry | Vetch | 85 g/acre | 45 d | 12 d |
| Broccoli | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel | 113 g/acre | 30 d | 12 d |
| Cabbage | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel | 113 g/acre | 30 d | 12 d |
| Canola | Canada thistle, scentless chamomile, common groundsel, wild buckwheat, perennial sow-thistle (top growth), volunteer alfalfa | 85–168 g/acre | – | 12 d |
| Canola | Canada thistle, scentless chamomile, wild buckwheat, perennial sow-thistle (top growth), common groundsel | 85–113 g/acre | – | 12 d |
| Cauliflower | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel | 113 g/acre | 30 d | 12 d |
| Chinese Broccoli | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel |
| 113 g/acre |
| 30 d |
| 12 d |
| Chinese Radish | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel | 113 g/acre | 30 d | 12 d |
| Cranberry | Vetch | 10 g/L | 60 d | 12 d |
| Fallow | Canada thistle, scentless chamomile, common groundsel, wild buckwheat, perennial sow-thistle (top growth), volunteer alfalfa | 168 g/acre | – | 12 d |
| Flax | Canada thistle, common groundsel, scentless chamomile, wild buckwheat, perennial sow-thistle (top growth), volunteer alfalfa | 113–168 g/acre | – | 12 d |
| Forage Grass | Labelled weeds plus alsike clover | 85–168 g/acre | 0 d | 12 d |
| Kohlrabi | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel | 113 g/acre | 30 d | 12 d |
| Lowbush Blueberry | Tufted vetch | 85 g/acre | 300 d | 12 d |
| Mustard Cabbage | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel | 113 g/acre | 30 d | 12 d |
| Nappa Cabbage | Ragweed, vetch, common groundsel, Canada thistle; suppression of sheep sorrel | 113 g/acre | 30 d | 12 d |
| Non-Crop Areas | Canada thistle, scentless chamomile, common groundsel, wild buckwheat, perennial sow-thistle (top growth), volunteer alfalfa | 168 g/acre | – | 12 d |
| Non-Crop Areas | Labelled weeds; rate depends on weeds present and level of Canada thistle control required | 85–168 g/acre | – | 12 d |
| Non-Crop Areas | Spotted and diffuse knapweed | 142 g/acre | – | 12 d |
| Oats | Canada thistle, common groundsel, perennial sow-thistle (top growth control), wild buckwheat, scentless chamomile, volunteer alfalfa | 85–113 g/acre | – | 12 d |
| Pasture | Labelled weeds plus alsike clover | 85–168 g/acre | 0 d | 12 d |
| Poplar | Canada thistle and other labelled weeds | 168 g/acre | – | 12 d |
| Rangeland | Labelled weeds plus alsike clover | 85–168 g/acre | 0 d | 12 d |
| Rutabaga | Common ragweed | 113 g/acre | 83 d | 12 d |
| Shelterbelt | Canada thistle | 168 g/acre | – | 12 d |
| Strawberry | Tufted vetch, Canada thistle; suppression of sheep sorrel and ox-eye daisy | 113–168 g/acre | – | 12 d |
| Sugar Beet | Canada thistle | 113–168 g/acre | 90 d | 12 d |
| Wheat | Annual and perennial broadleaved weeds listed on the tank-mix partner labels plus Canada thistle | 56.7–85 g/acre | – | 12 d |
| Wheat | Canada thistle, common groundsel, perennial sow-thistle (top growth control), wild buckwheat, scentless chamomile, volunteer alfalfa | 85–113 g/acre | – | 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 | ADIGOR Adjuvant Florasulam SC + MCPA Ester + Axial 100 EC: ... + 600 mL/ha + ADIGOR 700 mL/ha (DO NOT USE ON OATS) | 700 mL/ha |
| Required | AGRAL® 90 NON-IONIC WETTING AND SPREADING AGENT Refine Extra 20 g/ha + Agral 90 Adjuvant 0.2% v/v + 420 g ae/ha | 0.2% v/v |
| Required | AMIGO Adjuvant Select: 210-415 g/ha Lontrel 72 + 0.19 L/ha + Amigo Adjuvant 0.5% v/v | 0.5% v/v |
| Required | AMIGO Adjuvant Select + MCPA Ester: ... + Amigo Adjuvant 0.5% v/v + 420-560 g ae/ha | 0.5% v/v |
| Required | AMIGO Adjuvant Select + MCPA Ester ... 0.19 L/ha + Amigo Adjuvant at 0.5% v/v + 420 – 560 g ae/ha | 0.5% v/v |
| Required | AMIGO Adjuvant Select 0.19 L/ha + Amigo Adjuvant at 0.5% v/v | 0.5% v/v |
| Required | MERGE® ADJUVANT Poast Ultra 0.32-0.47 L/ha + Merge Adjuvant 0.75-1.0 L/ha | 0.75-1.0 L/ha |
| Required | SCORE® Adjuvant Liquid MCPA Ester + Horizon 240 EC: 230 - 290 mL/ha + Score Adjuvant 0.8 - 1.0% v/v | 0.8 - 1.0% v/v |
| Required | SCORE® Adjuvant Liquid Starane II + MCPA Ester + Horizon 240 EC: 230 mL/ha + Score Adjuvant 0.8% v/v | 0.8% v/v |
| Required | Merge Adjuvant Poast Ultra: 210-415 g/ha Lontrel 72 + 0.32-0.47 L/ha + Merge Adjuvant 0.75-1.0 L/ha | 0.75-1.0 L/ha |
| Required | Merge Adjuvant Poast Ultra + MCPA Ester: ... + Merge Adjuvant 0.75-1.0 L/ha | 0.75-1.0 L/ha |
| Required | Score Adjuvant MCPA Ester + Horizon 240 EC: ... + 230-290 mL/ha + Score Adjuvant 0.8-1.0% v/v (DO NOT USE ON OATS) | 0.8-1.0% v/v |
| Required | Agral 90 or Ag-Surf Florasulam SC + MCPA Ester + Everest 2.0 Herbicide: ... + Agral 90 or Ag-Surf 0.25% v/v (DO NOT USE ON OATS) | 0.25% v/v |
| Required | Turbocharge Starane II + MCPA Ester + Achieve Liquid: ... + 0.5 L/ha + Turbocharge 0.5% v/v (DO NOT USE ON OATS) | 0.5% v/v |
| Required | Score Adjuvant Starane II + MCPA Ester + Horizon 240 EC: ... + 230 mL/ha + Score Adjuvant 0.8% v/v (DO NOT USE ON OATS) | 0.8% v/v |
| Required | Agral 90 Adjuvant Refine Extra + 2,4-D Ester or MCPA Ester: 105 g/ha Lontrel 72 + 20 g/ha + Agral 90 Adjuvant 0.2% v/v + 420 g ae/ha (DO NOT USE ON OATS) | 0.2% v/v |
| Required | Merge Adjuvant Poast Ultra + MCPA Ester ... 0.32-0.47 L/ha + Merge Adjuvant 0.75-1.0 L/ha + 420-560 g ai/ha | 0.75-1.0 L/ha |
| Required | Score Adjuvant MCPA Ester + Horizon 240 EC ... 230 - 290 mL/ha + Score Adjuvant 0.8 - 1.0% v/v | 0.8 - 1.0% v/v |
| Required | Score Adjuvant Starane II + MCPA Ester + Horizon 240 EC ... 230 mL/ha + Score Adjuvant 0.8% v/v | 0.8% v/v |
| Required | Agral 90 Adjuvant Refine Extra + 2,4-D Ester or MCPA Ester ... 20 g/ha + Agral 90 Adjuvant 0.2% v/v + 420 g ae/ha | 0.2% v/v |
| Recommended | SURE-MIX™ SURFACTANT If a tank-mix partner requires the addition of an adjuvant add the recommended adjuvant and dilution rate to the tank-mix. | – |
| Recommended | adjuvant If a tank-mix partner requires the addition of an adjuvant add the recommended adjuvant and dilution rate to the tank-mix. | – |
| Compatible | MERGE® ADJUVANT After the Lontrel 72 Herbicide is dissolved, continue agitation and add the required amount of Merge adjuvant or non-ionic surfactant plus fertilizer | – |
| Compatible | Merge adjuvant continue agitation and add the required amount of Merge adjuvant or non-ionic surfactant plus fertilizer | – |
| Compatible | Halt If excess foaming occurs, a silicone anti-foaming agent may be added (e.g. Halt) | – |
| Compatible | non-ionic surfactant add the required amount of Merge adjuvant or non-ionic surfactant plus fertilizer | – |
| Compatible | silicone anti-foaming agent If excess foaming occurs, a silicone anti-foaming agent may be added (e.g. Halt) | – |
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.
