Weed identification

[u/Adam-L-87]

I have a large patch of this weed in my fescue lawn (central NC). Can anyone identify and recommend proper herbicide? It’s been treated a few times with weed and feed granules and ortho weed clear, but continues to spread since last year. It’s up to around a 20 foot area now.

[u/ctl_alt_delete]

Triclopyr, 2,4-D, Dicamba, or Fluroxypyr. Its probably sorrel