Morning Gents
Not meaning to step on any toes or butt in.
To me and I'm no expert but the grass appears to be Dallis grass which can be killed and controlled
using an MSMA based herbicide, for example Weed Hoe 108. It won't kill Bermuda grass if used according to label.
It might make it look sick but
it comes out right quick in a couple of days.
This is what I use to kill crab grass and bahia grass in my yard (not lawn).
I live to far from town to have a lawn.
Just my $.02
David