Sunflower, common

 

Common sunflower is native and present in the entire continental US, and ALS-resistant populations of common sunflower were confirmed in midwestern states in 1996-1997 (below). In areas where ALS-resistant populations are present, infestations should be treated with pre-emergence and post-emergence herbicide mixes that contain two or more other effective modes of action. Online resources for herbicide recommendations for common sunflower are few Рfor herbicide recommendations for common sunflower, contact your state extension weed specialist.

Herbicide resistant populations:

  • Group 2 (ALS inhibitors)

Locations of resistant populations:

Iowa, Kansas, Missouri, South Dakota