Ohio

Ohio State University Weed Management: https://u.osu.edu/osuweeds/

 

Herbicide resistant weeds in Ohio

Updated November, 2016. Source: Mark Loux, Ohio State University; www.weedscience.org – Ohio

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.

Lambsquarters

  • Group 2
  • Group 5

Wild carrot

  • Group 4

Waterhemp

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

Powell amaranth

  • Group 2

Common ragweed

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

Giant ragweed

  • Group 2
  • Group 9
  • Group 2 + 9

Common cocklebur

  • Group 2

Shattercane

  • Group 2

Horseweed

  • Group 2
  • Group 9
  • Group 2 + 9

Palmer amaranth

  • Group 9
  • Group 2
  • Group 2 + 9