From this altitude, through a lens covered with Vaseline, it's hard
to tell. If you can take another picture from 3 inches away it would
help. The best lawn pictures are taken on an overcast day to reduce the
contrast between light and dark.

Have you seen any seed heads on the weed? Nutsedge has a very distinct seed.

Have you gotten a lot of rain recently?

What is your watering schedule? How often and for how long do you water?

Hey dchall, I hope this picture is better. I have not seen any seed heads on these. We have not gotten alot of rain lately. I live in Spring Hill, and the rain lately has been bypassing us. We have gotten a bit, but not enough. Last week was in the middle 90's. This week is upper 80s. I water an inch a week, unless it rains an inch. I'm the one that would wait on the rain that would never end up coming, and some of my bermuda would go dormant by my sidewalk. So, I took your advice about not waiting on the rain. I just started seeing this a couple of days ago.

With temps in the mid 90s an inch, once a week, was good. Now that it's cooler I would not water that frequently. Bermuda can easily go two weeks with temps in the 80s.

That might be nutgrass. If you stretch out the mowing a little you should see seed heads in a little over a week. I know you want to mow bermuda at least once a week, but when you're trying to id a weed, sometimes you have to do odd stuff. Maybe mow normally but hand mow the grass around a small patch where this stuff is growing. Being careful to not cut the weed until you see the seed stalk shoot up.

Thank you both. I'll get to killing it!

Good news is that sulfentrazone based herbicides won't damage the rest of the lawn, so no downside. Give it a shot

Check out Halysulfuron as well. Brand name "Sedgehammer+" Its a dry mix comes in a pack that makes 1 gallon which covers 1000ft. I would also pick up some bue marking dye so you'll to see what you've sprayed and what you've missed. Use between mowings to avoid stressed out sedge. So spray at least 2 days after a cut and at lease 2 days before the next cut. Its a slow kill (about 2 weeks) but it kills the nut as well. Good luck

Oh and spray ASAP to avoid the grasses hardening off for fall. The uptake of the herbicide is reduced when this happens.

Any difference amongst grass types on those products? St Aug vs Burmuda vs Fescue? Safe for all?

I've heard it can discolor st. Aug at full label rate, but never experienced that. No issues with Bermuda, but check the label on fescue

I had something that looked just like what you have pictured but after pulling it it was baby dahlis grass

I also think it is sedge and the products mentioned above all work w/o damage to lawn. But be prepared to make nut sedge killing a yearly chore. Sedge grows in high moisture area. We tend to water more during high heat = nut sedge. There is no forever cure. I use sedgehammer, the best! But pretty pricey.

I scalped the small area this morning after mowing, and used some Ortho nutsedge. I probably did over water that small area because it seemed it wasn't getting enough water in the heatwave we had. I'll see how it does. I found another small patch of it along the swale at the edge of our backyard. We've had alot of rain this year compared to last, and this is the first year I'm seeing it.

Sulfentrazone always injures my fescue when sprayed during period of high heat. I took a sprayer bottle like the ones you use for glass cleaner, sprayed from the RTS bottle into the sprayer bottle, and now I just mist the nutsedge with that. Works great without injuring the fescue.

As j4 mentioned, you don't need a high dosage to see results. I use it at half strength pretty often just to save product