Have you tried the baby shampoo treatment on the very dry areas? For me, the only way I would apply 2,4-D is with a tank sprayer.

What % of the fertilizer is fast release vs. slow? I use the Lesco 000777 every 30 days. I believe the Lesco version of 29-0-0 is 75% fast release. Did you apply it to wet grass? Also, I don't think you should use 2,4-D when it is going to be above 80 degrees.

I believe the fertilizer was 75% slow-release. I used a broadcast spreader just before my scheduled lawn watering.

I used the 2-4D when it was cooler; it only recently started getting over 90 here in Round Rock.

I think the situation may be that I'm not watering enough. I realized I had my irrigation system on 70%, back from when the weather was wetter and cooler. I've since turned it back up to 100% and now have watering scheduled twice a week (still 1 inch total). I am thinking that it's no coincidence the grass is healthy and green in the low spots where water collects and along fencelines and the side of the house (less evaporation, more shade).

I had a problem with spotted spurge several weeks ago, so I applied some 2-4D to the lawn using my garden hose. Although I was careful not to over-apply, it's tricky to figure out just how much is being applied through those bottles that attach to a hose. The spotted spurge has all but disappeared, but now I am faced with a new issue: the lawn just doesn't seem healthy, and in some spots it seems either dormant or dead.

OK I know what the problem is, and I know where Round Rock TX is just north of Austin. I have relatives just to the West of you in Marble Falls. I also know a thing or two about the Bible and Bermuda grass.

It has been a early and hot spring in TX, especially from Dallas and points south. In your area it has also been dry and hot right?

What is going on is your Bermuda Grass is stunned from 2,4-D application in too warm of weather. It also sounds like you might of applied too much using a hose end sprayer which compounded your problem. Post-emergence herbicides like 2,4-D should not be used when daytime temps hit 85+ degrees or else it will burn the grass and/or even make it go dormant. If extreme temps above 90 and over application you can do some real damage to it.

Fear not my friend. Ease up on the fertilizer for a while and keep it watered. It will come back.

Is it Tan or straw colored? Or is it dark like gray or charcoal colored? Tan/Straw colored is stunned dormant grass. Dark and crunchy is dead.

Even if it is dead the surrounding grass will fill it back in with proper care.

Good Luck

TW

At first I thought it may have been the 2-4D as well, but then why is the grass so much greener in the shaded/wet areas? It's very odd.

There are a couple of patches that appear grayish, but most of the spots appear dormant (yellowish). I will avoid fertilizer and keep it watered. Hopefully the healthy grass can start to take over the bad spots.

Thanks for the advice. :)

Oh, and I just wanted to stress that I applied the 2-4D back when temps were topping out in the high 70s. It was several weeks after that that they reached 85.

texas-weed, if you could please check my PhotoBucket album again, I uploaded a few new pictures of the patches. It does look like the grass has been "burned" with a chemical, but it looks tan and not black/decomposing. Do you know how quickly the dormant grass will come back?