On Tue, 24 Jun 2008 15:10:08 GMT, gecko wrote:

I have been fighting a weed for a few years now, all to no avail. It
is sometimes called 'wiregrass'. sometimes 'witchgrass', I think.
It grows long 'stringers' below and above ground, and when I pull one
up, sometimes the 'stringer' is a foot or two long! Terrible stuff.

I have tried a few weed killers, such as Weed-B-Gone, and weed killers
in Turf Builder. I think the danged weed feeds on that.

The local nursery tells me that you can't kill it except by using a
vegetation killer, which of course would kill grass and everything.
I hate to think of doing that.

I guess I have a few questions. First, is a vegetation killer my only
choice? If not, what else can I try? If so, when do I apply it? In
the Fall? Second, how soon after something as drastic as that can I
then plant grass seed? Seems to me that the killer would exist in the
soil for a while. Maybe years?

Thanks
-GECKO

Have you considered burning the weeds? You can attach a kit to a
propane tank and burn the weeds. Easy to localize the flame, and it
will scorch the roots.

One product is called a Weed Dragon (link and video below). I've had
good luck killing weeds with a torch, not this brand...

You might be able to rent a torch, if you have a propane tank.
The grass will grow back if any is brunt.

http://www.flameengineering.com/Weed_Dragon.html

Good luck.