St Augustine grass brown spots

[wal3]

On the north side of lawn there are these brown spots mixing in with St Augustine grass would anyone know the cause, cure and how to prevent this from spreading? Thank You

 

[Mystic Moon Tree]

It looks fairly dry & close cut to the earth. Try fertalizing it, reseeding, saturating it thoroughly with water to help dilute any excess nitrogen or urea (if you have pets) & let it grow long and healthy for a while before mowing. Consider not mowing as short in that area, or growing a tree or bush that will offer partial shade to the area. It could be burned from the sun, or pet urine. It could be being killed off by a weed grass or soil pathogen too. Doesn't look like high traffic damage.

 

[DirtMechanic]

This time of year its mainly bugs and fungus. Pull roots up and examine, dig soil up and filter for larvae etc. St Aug is a sweet salad full of moisture and a very popular dish when it is mature.