South Carolina

Clemson University Extension Pest Management:

Herbicide resistant weeds in South Carolina

Updated December 9, 2016. Source: Mike Marshall, Clemson University; РSouth Carolina

Reading this list: Each weed with herbicide resistant populations in this state is listed. Underneath each species is a list of the unique resistant biotypes of that weed in the state, according to the herbicide group(s) they are resistant to.

Palmer amaranth – Highest concern overall in SC

  • Group 2
  • Group 3
  • Group 9
  • Group 2 + 9

Italian ryegrass РHighest concern for SC wheat production 

  • Group 1


  • Group 3

Common cocklebur

  • Group 17