I cleared a patch on the side of my house this summer, subsequently planted bermuda, and was watering for about 21 days. I started seeing these big orangish-brown moths rising up every time I watered the seeds/seedlings and didn't know what they were. I started looking into it...

Well, once the seedlings were about 1.5" tall I noticed the whole patch seemed to be getting a bit brown, even though I was watering daily.

I went out one morning to turn the sprinkler on, then walked over to the patch, and it was like the ground was moving!!! It was COVERED UP with army worms! Them sumbitches had eaten almost every shoot down to about 1/8". No wonder it looked peaked.

I sprayed the whole patch with some Ortho and it seemed to do them in. Patch is only about 30' x 10', so nothing too big. I still see the moths every now and then, but I hose em down with high pressure water.