Michigan

Michigan State University Weed Science: http://www.msuweeds.com/

Herbicide resistant weeds in Michigan

Updated November, 2016. Source: www.weedscience.org – Michigan

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

Common groundsel

  • Group 5

Common ragweed

  • Group 5

Common purslane

  • Group 5 + 7

Wild carrot

  • Group 4

Common ragweed

  • Group 2

Waterhemp

  • Group 2

Powell amaranth

  • Group 5 + 7

Redroot pigweed

  • Group 5 + 7

Ladysthumb

  • Group 5

Smooth pigweed

  • Group 2

Horseweed

  • Group 2
  • Group 7
  • Group 9
  • Group 5 + 7

Halberdleaf orach

  • Group 5

Eastern black nightshade

  • Group 5

Lateflowering goosefoot

  • Group 5

Velvetleaf

  • Group 5

Kochia

  • Group 2

Giant foxtail

  • Group 2

Palmer amaranth

  • Group 9

Prostrate pigweed

  • Group 5