Image: common cocklebur flowers and leaves. www.illinoiswildflowers.info
Herbicide resistant populations of common cocklebur are present in many states throughout the midwest, south, and mid-Atlantic. Cocklebur is a summer annual that can reach 2-4 ft. tall.
- Group 2
- Group 17
Locations of resistant populations:
Arkansas, Illinois, Iowa, Maryland, Minnesota, Mississippi, Missouri, North Carolina, Tennessee (Search by State to see which resistant populations are present in each state)