carb grass
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Subject Author Date
carb grass Eddie G 03-11-2008
Posted by Eddie G on March 11, 2008, 8:34 pm
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 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.

I know I'll have brown spots until I seed and water at the end of the
summer.

Thanks!

Eddie G


Posted by Dale P on March 12, 2008, 12:21 am
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> 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.
>
> I know I'll have brown spots until I seed and water at the end of the
> summer.
>
> Thanks!
>
> Eddie G


A pre-emergent will stop the seeds that are there from germinating. Other
seeds may be coming into your lawn on the wheels of the mowing service.
Seeds that have not been exposed to pre-emergent will germinate. I do not
know what you mean that the cutters break the barrier of the pre-emergent.

Do not use Round Up as it will leave a major brown spot that will not fill
in readily. Bayer chemical does make a weed killer that also works on
growing crab grass without killing most lawns. It is the only selective
crab grass killer that I have seen. I have used it mid to late season, and
it will kill the crab grass. The problem is that it is a very slow kill.
It does not give quick results. It will cut the local seed infestation, but
crab grass seeds come from everywhere. A thick, healthy lawn will help to
prevent crab grass by choking it out. I think that your lawn service is not
doing a good job if the pre-emergent is not doing a better job for you.

Good Luck

DP


Posted by Eddie G on March 12, 2008, 5:20 pm
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>
>
>
>
> > 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.
>
> > I know I'll have brown spots until I seed and water at the end of the
> > summer.
>
> > Thanks!
>
> >Eddie G
>
> A pre-emergent will stop the seeds that are there from germinating. Other
> seeds may be coming into your lawn on the wheels of the mowing service.
> Seeds that have not been exposed to pre-emergent will germinate. I do not
> know what you mean that the cutters break the barrier of the pre-emergent.
>
> Do not use Round Up as it will leave a major brown spot that will not fill
> in readily. Bayer chemical does make a weed killer that also works on
> growing crab grass without killing most lawns. It is the only selective
> crab grass killer that I have seen. I have used it mid to late season, and
> it will kill the crab grass. The problem is that it is a very slow kill.
> It does not give quick results. It will cut the local seed infestation, but
> crab grass seeds come from everywhere. A thick, healthy lawn will help to
> prevent crab grass by choking it out. I think that your lawn service is not
> doing a good job if the pre-emergent is not doing a better job for you.

What I was told about the pre-emergents is that it forms a barrier on
top of the seeds to prevent germination, and if this barrier is
broken,from any type of trauma to this "layer", like from the week
whackers, than the crab grass will germinate.

BTW, I was using Chem Lawn for years and this year I am using Scott's
lawn service, so we'll see what happens.

Posted by Stubby on March 12, 2008, 7:15 am
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> 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.



Posted by on March 13, 2008, 10:17 am
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wrote:
>
n pre-emergent's and when the barrier gets broken from
> > the lawn service I get crab grass. =A0So I was thinking since there is n=
o
> 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? =A0I figur=
e
> 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. =A0 In =
the
> early Spring as others have noted, a pre-emergent treatment is required to=

> prevent the plants from sprouting. =A0 =A0But later on, say in July, you n=
eed 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.

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