I feel like so many times that Dallisgrass, goosegrass, quackgrass all get too similar for my eyes. What I think of dallisgrass is actually much lower to the ground and tends to run lateral rather than vertical.

Anyway, I can good control on grasses like these (in my Bermuda) with foramsulfuron or sulfentrazone products. I think topramezone would be a no-go since you have centipede. Nothing outside of glyphosate kills it dead but they will suppress it and hope your lawn takes over and chokes it out.

 

Thank you Sir!

 

@Lsuwhodat that might be dallisgrass, but I would want to see that seed head opened up. Celsius won't kill dallisgrass anyway.