Arkansas

Information on weed management in Arkansas

University of Arkansas Weed Management in Row Crops

Arkansas Row Crops Blog

Herbicide Resistant Weeds in Arkansas

Updated October 24, 2016. Lauren Lazaro and Jason Norsworthy, University of Arkansas; www.weedscience.org – Arkansas

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.

Goosegrass

  • Group 3

Common cocklebur

  • Group 2
  • Group 17

Barnyardgrass

  • Group 7
  • Group 7 + Group 4
  • Group 13

Palmer amaranth

  • Group 9
  • Group 2
  • Group 14

Redroot pigweed

  • Group 2

Tall waterhemp

  • Group 9

Italian ryegrass

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

Red rice

  • Group 2

Horseweed/marestail

  • Group 9

Common ragweed

  • Group 9

Giant ragweed

  • Group 9

Johnsongrass

  • Group 9

Rice flatsedge

  • Group 2

Smallflower umbrella sedge

  • Group 2

Junglerice

  • Group 2 + Group 7 + Group 26

Yellow nutsedge

  • Group 2

Resources:

VIDEO: Weed Control in Cotton: Strategies to Fight Resistance – Jason Norsworthy