On Jul 4, 9:42*pm, Kay Lancaster wrote:
On Sun, 4 Jul 2010 14:00:56 -0700 (PDT), hr(bob)

wrote:
I have the invasive grass/weed shown in the picture in many places in
my lawn. *The spots of weeds *pop up with no apparent source. *They do
no respond to weed killer, and they crowd out regular lawn grass. *I
am in the Chicago suburbs. *Can anyone tell me what the grayish green
grass/weed is and how to get rid of it?

http://www.flickr.com/photos/bobhofmann/4761771580/

Not enough detail for an accurate diagnosis, but I suspect it's crabgrass,
an annual. *If so, your choices are mowing practices and fertilizer or
chemical warfare.

Mowing/Fertilizer:http://answers.yahoo.com/question/in...s_in_home_lawn...

ID:http://www.garden-counselor-lawn-car...t/herbici3.htm

Kay

I'm 99.9% sure it is not what most of us here in the Midwest call
crabgrass. I have a few patches of crabgrass, but nothing like the
number of patches of what I showed in the picture. I hope to get a
sample to our local Morton Arboreteum, and see if anyone there has any
ideas. But, I'm not too hopeful as they are primarily interested in
woody plants and trees, not grasses.