The crab grass slipped in on my lawn this spring. I have sprayed Ortho crab
grass killer on it with very dissapointing results. It was left over from
last year. Does it have a shelf life once opened? Are there other brands of
crab grass killer that work better?
Where do you live? It seems very early for crabgrass in most of the US.
To answer your question, there are a number of varieties of crabgrass
killer. The one I like is Image. I had a huge amount of crabgrass in my new
zoysia last summer. I sprayed it with Image in one of the hose end
applicators and the crabgrass was noticably damaged in a week or so and
completely gone in 3 weeks or so.
Thanks for the link. I b'lieve most of what I have is annual rye grass. I
re-seeded some spots last fall and apparently it was in the mix. I bought
what I thought was quality seed and there was no listing of annual rye grass
on the assay label. Anyway, I can live with the rye since it's an annual and
it gets mowed regularly hopefully keeping it from going to seed.
I think it is annual bluegrass "poa annual". Does it have numerous little
silver/white seeds at the top of the grass leaves, assuming you let it grow?
The only way to get rid of it this spring is to either pull it up by hand or
to wait until warmer, drier weather kills it. I have a bunch of it in my
yard. Didn't think I'd have that problem with <1 year old zoysia sod.
Anyway, the way to keep it from coming back next year (it is a fall/winter
germinating seed) is to apply a pre-emergent that is effective on grassy
weeds early this fall.
Hard to get depth percerption, but IMHO, that looks like crab grass.
BTW, it has been warm enough here in PA to get it. I've seen some on
OTHER people's yards.
The forsythia around here bloomed in early March.
tom @ www.Consolidated-Loans.info
One thing for sure, what Chas has is not crabgrass. I line in NJ and
immediately recognized this as the same thing I have in a few spots in
my lawn. It's lighter in color, grows faster than the surrounding
grass, is most noticeable this time of year, then either greatly
diminishes or disappears by summer, only to reappear in the same spot
next spring. It doesn't look at all like crabgrass, which grows
lower to the ground. This stuff grows low for the first inch or so,
then shoots up straight.
It doesn't respond much to Acclaim, which is effective against some
undesirable grasses, especially crabgrass. So, I whacked the few
spots I had it growing in with Roundup and reseeded before it spreads
more and gets way out of control.
I may pull a remaining clump and take it to the local state agri
service for identification, as I've been curious as to exactly what
this is for awhile. Quack grass is on my list of possibilities too.
It might be quack if it hasn't gone to seed yet, or it could also be some
sort of bizarre annual rye, or blue...or, if it is or has seeded. (?)
As someone else has already suggested, the only way to attempt a control of
an annual grass infestation is with a late summer pre-emergent crabgrass
control product application. (the same product you'd use in the spring)
You have to lay it down before the annual grasses re-germinate....otherwise
their whole life cycle starts over. (timing is critical)
It's a real problem to deal with, if you're going for a mono-strand look.
I agree that it's too early for crabgrass for most of the US.
Crabgrass needs soil temps in the 70s to germinate, which is why it's
not a problem most places until 2-3 months from now.
If it is crabgrass, Aclaim is the best product I've found. It's not a
typical retail product that you'll find at home centers. You need to
buy it at an agri supply type place, like Lesco.
Same here, I've had the same experiences like that too. I was
told.... if it was stronger, the regular grass would die too.
I just get mad and pull the stuff up by hand now. If I'm in a rush, I
run around spraying, and come back later, since the crab grass
'yellows' so I can find it later when I have time.
tom @ www.Consolidated-Loans.info
To Chas and anyone else still interested, I had some weed grass growing
in my lawn that looked identical to the photo that Chas had provided a
few weeks ago. I let it grow to seed head and managed to identify it
as likely to be poa trivialis. Took it to the local county agri
service here and the expert there agreed. It's common name is rough
The bad news is that there is no selective herbicide for control and it
will spread. Roundup and reseeding, pulling, mowing it frequently
enough to limit seed formation, applying pre-emergent crabgrass control
in early Fall are some of the ways to deal with it.
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