Indiana

Herbicide resistant weeds in Indiana

Last updated November, 2016. Source: www.weedscience.org – Indiana, Bill Johnson-Purdue University

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.

Giant ragweed – highest concern

  • Group 2 + 9

Horseweed – highest concern

  • Group 2 + 9

Waterhemp – highest concern

  • Group 2
  • Group 9
  • Group 14

Common ragweed

  • Group 2 + 9

Giant foxtail

  • Group 2

Jimsonweed

  • Group 5

Johnsongrass

  • Group 2

Kochia

  • Group 2 + 5

Lambsquarters

  • Group 5

Palmer amaranth

  • Group 2
  • Group 9
  • Group 14

Redroot/smooth pigweed

  • Group 2
  • Group 5

Shattercane

  • Group 2