Louisiana State University Weed Science:

LSU Weed Science Main Page

Weed Science Information – Weeds and Weed Control

Newsletters – Louisiana State University Agriculture

Louisiana Suggested Chemical Weed Control Guide

Weed Science contact: Dr. Lauren Lazaro, Assistant Professor (Production Agronomy and Weed Science)

Herbicide resistant weeds in Louisiana

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

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 cocklebur

  • Group 17


  • Group 2
  • Group 4
  • Group 7


  • Group 1


  • Group 1
  • Group 9

Amazon sprangletop

  • Group 1

Palmer amaranth

  • Group 9

Rice flatsedge

  • Group 2

Italian ryegrass

  • Group 9


  • Group 9