On Mar 12, 7:15*am, "Stubby"
wrote:
"Eddie G" wrote in message

. .. Every year I put down pre-emergent's and when the barrier gets broken from
the lawn service I get crab grass. *So I was thinking since there is no
way
to stop the seeds from germinating that the only way to get rid of it
permanently is to let the seeds germinate, then kill it with roundup
BEFORE
the grass matures enough to produce and drop seeds.

Does this sound like a good way to get rid of it permanently? *I figure
the
challenge I have is that when it grows I don't stop it from maturing and
dropping seeds.

Crabgrass is hard to control and takes a bit of effort every year. * In the
early Spring as others have noted, a pre-emergent treatment is required to
prevent the plants from sprouting. * *But later on, say in July, you need to
use a specific crabgrass control to kill plants before they can drop their
seeds.


I tend to have some crabgrass that occurs depsite using a pre-emergent
too. And it's most prevalent at the strip of curb by the street.
It's an interesting theory that a weed whacker used to edge is the
cause. I tend to doubt it though. In my case, I use an actual edger
about every 6 weeks and still have a similar problem. I guess it's
possible that the edger also throws up some dirt that affects the
barrier.

The conclusion I came to is that the small amount of crabgrass that
does germinate manages to do it mostly at the street curb because that
is where the grass tends to be the weakest. That area gets the most
sunlight and bakes right next to the hot pavement, so the grass never
does as well as in the center of the lawn. It could also be that I
should put down the pre-emergent earlier, as that area may be getting
to germination temps well before the rest of the lawn.

I use Acclaim to spot treat the crabgrass. If you hit it early, it's
very effective, far better than any of the crap ones I've bought at
retail stores.