Tank mixing herbicides for improved weed control and resistance management is an investment in crop yield and can lower future costs of weed control on your farm. In my experience, working with farmers for successful weed control includes a main herbicide with the addition of a herbicide tank-mix partner specific to the weeds in a field. The addition of a tank-mix partner improves weed control by additive benefit or synergistic benefit. An additive benefit is where the tank-mix partner controls weeds that are not controlled (or are only suppressed) by the main herbicide in the tank-mix. A synergistic benefit is where the control of a certain weed by the herbicide tank-mix is better than the control rating of either herbicide on its own.