Thanks for the reply! It has all rooted well and was growing thick and green for over a month. When the forecast shows no rain, I water in the morning. As it was just installed in April, have not fertilized yet. Wondering if it's some kind of fungus. New Orleans is really hot, humid, and rainy this time of year.

So it gets water every day either from rain or from you?

Looks like a definitive line where it's growing well and not; I'd suspect grubs worms or a fungus.

Brett, yes.

Steve, I think we are going to put some fungicide on it (Scotts).

MM I borrowed the following from dchall on this forum. Maybe he won't mind.

You have to stop the frequent watering and start with deep watering, but if your soil will not absorb deep watering, then start with an application of shampoo to allow better penetration. Spray any clear shampoo (I like generic baby shampoo) at a rate of 3 ounces per 1,000 square feet. Follow that with 1/2 to 1 inch of water. If you get runoff or standing water before you get at least 1/2 inch, then stop and wait 15 minutes for the water to soak in. Then resume/repeat until you get the 1/2 inch. You can measure 1/2 inch by placing cat food or tuna cans around the yard. Time how long it takes to fill the cans half way. Or for a full inch, time how long it takes to fill the cans. 1 inch is what you should be watering every time you water. With temps in the 70s, that should be once every three weeks. With temps in the 80s, that should be every other week. With temps in the 90s, that should be once a week. With temps in the 110s, that should be once every 5 days. I know this works because we've been promoting it for 10 years on this forum. Also a friend of mine in Gilbert, AZ is doing it with his St Augustine.

Have you pulled a soil sample? If not go here http://www.loganlabs.com/get-started.html and send them a sample. Post the results when they come in and someone will tell you what you need to do from there.

I laid St. Augustine last Nov. and it was looking OK, but not great. I got the soil sample and posted it here and morph advised on what to do. It looks MUCH better now after starting morphs plan only a month ago!

Also, mow at your mowers highest setting.

I have not pulled a sample. Good idea.

We have been properly watering and mowing at the appropriate height.

Watering: Deep and infrequent is the mantra for watering. This is for all turf grass all over the place. Deep means 1 inch all at one time. Put some cat food or tuna cans around the yard, and time how long it takes your sprinkler(s) to fill all the cans. Memorize that time. That will be the time you water from now on. My hose, sprinkler and water pressure takes 8 full hours to fill the cans. Your time will likely be less. I like gentle watering. As for watering frequency, that depends on the daytime air temperature. With temps in the 90s, deep water once per week. With temps in the 80s, deep water once every 2 weeks. With temps in the 70s, deep water once every 3 weeks. With temps below 70, deep water once a month. Note that you have to keep up with quickly changing temps in the spring and fall. This deep and infrequent schedule works in Phoenix and in Vermont, so it should work for you. The reason for deep and infrequent is to grow deeper, more drought resistant roots and to allow the soil to dry completely at the surface for several days before watering again. If it rains, reset your calendar to account for the rainfall.

So I agree if you have been watering every day, then fungus would be number 1 on the list of issues to be concerned about. This time of year in New Orleans you should be watering no more than once a week and possibly less due to the humidity. I think what you're seeing is the after effects of that week long torrential rain about 3 weeks ago. My normal reply would have been to suggest using corn meal to resolve the problem but others have had much better success on this type of disease (rain induced) using chemical approach. I don't have one to recommend. Read the labels to make sure of two things. One is that it is safe for St Augustine and the other is that it can be used at the temperatures in NO.