Canola is sensitive to carryover from many herbicides. Click the link below for a list of products that could be used this fall on fields planned for canola next spring, but read the notes carefully. Some cannot be applied after a certain date. You’ll find useful pointers to help in your product choice and herbicide timing.
| wdt_ID | Herbicides registered for use in the fall on land planned for canola. | Notes and recommendations |
|---|---|---|
| 1 | Glyphosate | Apply at least 1,040 GAE (grams of glyphosate acid) per acre to get effective perennial control, given that leaf area will be smaller than pre-harvest. Monsanto does not recommend any tank-mixes with Roundup for use in fall. |
| 2 | Distinct | Distinct combines two actives – Group 4 dicamba and Group 19 diflufenzapyr – in a granular pre-mix. From BASF: “We recommend it as a tank mix partner with glyphosate for enhanced control of broadleaf annual, winter annual and perennial weeds. Distinct mus |
| 3 | Tribenuron (Express SG, Spike, Nuance, MPowerX) | DuPont recommends an application of its Express SG before October 1 on fields planned for canola. Express SG must be tank mixed with at least 0.5 litre/acre glyphosate equivalent for fall application prior to seeding canola in spring. |
| 4 | Heat LQ | The LQ formulation of Heat (Group 14 saflufenacil) can be applied in fall to prep land for canola the following spring at any of the registered rates — 59, 43 or 21.5 ml/ac (80, 40, or 30 acres per case). There is no restriction for when it can be fall ap |
| 5 | 2,4-D | Use caution. Clark Brenzil, provincial specialist, weed control, with Saskatchewan Ministry of Agriculture, says: “Phenoxies (2,4-D, MCPA) should not be used in the fall prior to the seeding of canola. The target of phenoxy herbicides applied in the fall |
| 6 | MCPA | MCPA has no recropping restrictions listed, but it does present a re-cropping risk for canola – especially when conditions at application are extremely dry. Growers are advised to avoid using MCPA on land intended for canola next spring. MCPA persistence |
| 7 | KoAct | KoAct has both 5 oz of 2,4-D and 4 g of tribenuron. NuFarm is comfortable with an October 15 cutoff with this product. |
| 8 | Lontrel | You need higher rates and generally get poorer control in the fall than the early in-crop stage. Lontrel provides its best systemic activity on Canada thistle at the 10-15 cm height when thistles are actively growing and before the bud stage. Clopyralid t |
| 9 | Soil-active herbicides approved for fall application on fields planned for canola | These products are applied in the fall but are designed to control weeds emerging early in the spring. The act of incorporation will provide some management of existing fall weeds. Notes and restrictions: |
| 10 | Triallate (Avadex) | It controls wild oats and wild millet as they emergence through the herbicide layer in the spring. Fall activity is not really needed or desired for these annual weeds anyway. |
