Barnyardgrass

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Barnyardgrass is an agronomic issue in rice in south-central states, but its distribution ranges through many US states. In rice, rotating with soy can help manage barnyardgrass populations by introducing more management options. Effective control during the soy rotation is important for continued depletion of the population – otherwise the positive effects of rotation are negated. For more info, read this article for the University of Mississippi.

Resistant populations:

  • Group 2
  • Group 5
  • Group 7
  • Group 13
  • Group 7 + 4
  • Group 2 + 4 + 7
  • Group 1 + 2 + 7 + 26

Locations of resistant populations:

Arkansas, Maryland, Mississippi, Missouri, Texas (Search by State to see which resistance populations are present in each state)

Resources:

Identification, Biology, and Control of Barnyardgrass in Arkansas Rice – University of Arkansas

Barnyardgrass Identification – Virginia Tech

Barnyardgrass Management in Soybean and Rice, in the Mississippi Delta – University of Mississippi