Two main reasons to add a tank mix to pre-seed glyphosate are: One, the tank mix reduces selection pressure for glyphosate-resistant weeds, protecting glyphosate as an effective mode of action. Two, using two modes of action can improve weed control, especially for weeds like cleavers and kochia.
Note that with a tank mix, you will want to use higher water volumes than you would for straight glyphosate. It will also mean good sprayer clean-out is required between fields, but the extra effort can protect glyphosate efficacy for the long term. The Canola Encyclopedia has a list of pre-seed herbicide options, including glyphosate tank mixes, for use prior to seeding canola.
While booking herbicides and looking at spring discounts, look at tank mix options for pre-seed glyphosate. Tank mixes are recommended to control canola volunteers and glyphosate-resistant kochia, and to protect the long-term viability of glyphosate.
|wdt_ID||Herbicide||Group||Foliar contact herbicide||Foliar systemic herbicide||Soil activity (already emerged)||Residual soil activity|
|2||Cleanstart (Glyphosate + carfentrazone)||9 + 14||x||x|
|5||The following products may or must be mixed with glyphosate|
|6||Aim EC (Carfentrazone)||14||x|
|8||Command 360 ME (Clomazone)||13||x|
|9||Command Charge (Clomazone + carfentrazone)||13+14||x||x|
|10||Conquer (Bromoxynil + carfentrazone)||6+14||x|