![](https://a68.tinypic.com/bh0k12.jpg)
![](https://a63.tinypic.com/2055mxk.jpg)
![](https://a63.tinypic.com/29gd72c.jpg)
![](https://a67.tinypic.com/2afilp2.jpg)
Howdy OB. This from my St. Augustine lawn in Houston. I've tried Atrizine, Certainty, Quicksilver, Promidine...no luck. I've pulled a ton of it but they have some very hard roots for their size. Anyone know what it is and how to beat it without wiping out the grass?