North Carolina

Herbicide Resistant Weeds in North Carolina

Updated October 18, 2016. Source: Wesley Everman; www.weedscience.org – North 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.

Common ragweed

  • Group 2
  • Group 9
  • Group 2 + Group 9 + Group 14

Palmer amaranth

  • Group 2
  • Group 9

Horseweed/marestail

  • Group 9

Common lambsquarters

  • Group 5

Smooth pigweed

  • Group 5

Italian ryegrass

  • Group 1
  • Group 2
  • Group 1 + Group 2
  • Group 9

Common cocklebur

  • Group 2
  • Group 17

Annual bluegrass

  • Group 3
  • Group 5

Goosegrass

  • Group 3