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Johnsongrass (Sorghum halepense) may reach a height of 31/2 feet and competes heavily with trees for nutrients and water. It reproduces by seed and perennial rhizomes, making it difficult to control.

Johnsongrass (Evans, IL Wildlife Action Plan, Bugwood.org)
Johnsongrass.

(Photo: Chris Evans, Illinois Wildlife Action Plan, Bugwood.org)

   

Management:

  • Pre-emergence herbicides applied persistently and repeatedly after germination
  • Herbicides selective for grasses can also be applied

     

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