@Ecks from Tex Interesting. Honestly the nutsedge is the only thing I'm having problems with right now. I keep hitting them with sulfentrazone but it's like wack-a-mole. Those die but a week later I get more in other areas.
Also what's the link to the picture? What's in the buckets? Looks like some fertilizer but not sure what kind.
Crap sorry. I meant to link to the FMC assurance program brochure for Bermuda turf managers. I accidentally had a photo last copied from another post in the forum where I was trying to get a closer look at those labels on the buckets. I changed the link in my post to the FMC program. It doesn't mean anything for the homeowner, but it's interesting how much they claim this is tailored to Bermuda
As far as sedges, you can control yellow sedge and killinga with a pre-emergent like Pennant Magnum (or something like this Eschelon). I use PM and can say I do not have a single yellow sedge in my lawn. I did this time last year. But you can't do anything on the purple sedge except near you're doing. Over time, your turf will thicken and it will squeeze out the sedges that are trying to grow up above the canopy. That's the only way - high quality turf.