Advantage Bromoxynil + MCPA Co-Pack herbicide is a A wide spectrum Broadleaf weed control product that is very tank mixable. It contains two active ingredients, Bromoxynil and MCPA Ester, the active ingredients in Buctril® M Herbicide. Bromoxynil is a Group 6 post-emergent herbicide that is an excellent control option for many broadleaf weeds, including volunteer canola. MCPA Ester is a Group 4, broad-spectrum, systemic herbicide, which provides post-emergent control of key broadleaf weed species, like Annual Sow Thistle, Flixweed, Lamb’s Quarters and Stinkweed. It provides effective control of broadleaf weeds in several crops.