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NCSU Extension Publication:AG-763W
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Summer Weed Control - St. Augustinegrass

Positive identification of the specific weed and knowledge of the kind of turfgrass being treated is CRITICAL, or, you could end up with a dead lawn!

Additionally, read and carefully follow all label instructions including the specific kind of weeds controlled and any restrictions on where materials can be applied!

Grassy weed control (such as crabgrass or goosegrass)

  • mesotrione (Tenacity)
  • asulam (Asulox)
  • thiencarbazone-methyl + iodosulfuron + dicamba (Celsius)

Broadleaf weed control

  • 2,4-D amine (various brands)
  • mecoprop (MCPP Amine, Mecomec)
  • dicamba (Banvel)
  • diglycolamine  (Vanquish)
  • 2,4-D amine + MCPP + dicamba (Trimec [various formulations], Triplet, Three-Way Selective Herbicide)
  • 2,4-D amine + MCPP + dichlorprop (Spoiler, Triamine)
  • MCPA + MCPP + dicamba (Tri-Power)
  • 2,4-D amine + fluroxypyr + dicamba (Escalade)
  • carfentrazone-ethyl (QuickSilver)
  • carfentrazone + 2,4-D ester + MCPP + dicamba (Speed Zone Southern)
  • penoxsulam (various brands)
  • pyraflufen ethyl (Octane)
  • metsulfuron (Blade, Manor, MSM Turf)


  • bentazon (Basagran T/O, Lescogran)
  • imazaquin (Image)
  • halosulfuron (Sedgehammer)
  • sulfosulfuron (Certainty)

For help with weed identification or for more detail on herbicide efficacy and turfgrass tolerance see the following: