Leaves are egg-shaped. Seedhead branches are few and tend to be short and stout with a prickly appearance. Technical Characters Bracts long, 4-7 mm. Management Redroot pigweed is less difficult in general to manage than common waterhemp. However, caution is needed.
Some populations have triazine resistant biotypes.
Although not currently resistant to ALS inhibiting herbicides, redroot pigweeds are known to hybridize with common waterhemp in Iowa. Although most hybrid individuals are sterile, they can produce some viable seed. These second generation hybrids have the potential to backcross resistance genes into redroot pigweed populations. An integrated program combining cultivation and appropriate herbicides should facilitate effective redroot pigweed control.