Is that bermuda? or is it St Augustine that has a few sprigs of bermuda trying to take over?

Are you watering it? If so how often and for how long?

How much rain did you get over the past few weeks?

Did this just start?

How high/low do you mow?

Does this area seem to hold water when it rains?

I did 419 back in 2005 and it did great for 3 years until mole crickets took it down. I recently lost my St Augustine yard to fungus after trying to cure it with Scotts Lawn fungus control. I believe if I had used a better product I would still have a lawn. Hopefully someone can tell you what to use, I only know Scotts is not it.

I hear Headway G is really good.