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  1. #1
    Silver Member
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    Kubota B3030 HSDC, Kubota ZD 18

    Default How to selectively kill wide grass/crab grass.

    I have more and more "wide grass" invading my Kentucky Blue Grass lawn. I live in the country and I suspect it may be brome?? It is an almost florescent green color. How can I kill off this crabgrass appearing grass without killing the desired lawn?
    Thanks,
    gh

  2. #2
    Elite Member
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    Northern, IL
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    Branson 2400H

    Default Re: How to selectively kill wide grass/crab grass.

    There are products called crab grass preventers but I do not know of any product that will kill crab grass and not hurt your lawn in the process.

    Roy
    Artificial Intelligence will never overcome natural stupidity.

    Branson 2400H MMM & FEL

    JD 112

    BX1850 gone but not forgotten

  3. #3
    Elite Member smstonypoint's Avatar
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    Oct 2009
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    SC (Upstate) & NC (Piedmont)
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    NH TN 55, Kubota B2320 & RTV 900, Bad Boy Outlaw 61" ZTR

    Default Re: How to selectively kill wide grass/crab grass.

    Quote Originally Posted by oldnslo View Post
    There are products called crab grass preventers but I do not know of any product that will kill crab grass and not hurt your lawn in the process.

    Roy
    I think Roy is correct -- you have to apply the pre-emergent products in the early spring to prevent the crabgrass seed from germinating. The rule of thumb here in SC is to apply the products when the forsythia are in bloom.

    Steve

  4. #4
    Platinum Member
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    Sep 2008
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    Central, AR

    Default Re: How to selectively kill wide grass/crab grass.

    I have a lot more crabgrass than normal this year. Probably due a decrease in yard time due to 2 little ones. I sprayed with a 24d crabgrass killer a few weeks ago. It turned brown but came back. The preemergent in the springs is the best way.

  5. #5
    Super Star Member
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    Aug 2001
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    Upper Midwest USA
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    JD 4300, JD X485 JD 4x2 Gator, JD 425, JD455

    Default Re: How to selectively kill wide grass/crab grass.

    Have not heard of a 24d crabgrass killer. Do you have a brand name and info from the label. I've been under the impression that crabgrass can only be controlled with the pre-emergence treatments.

    The OP seems to think he has something other than crabgrass. Either brome or quack. I think brome can be identified by a V shaped dent in the blade. That is what I recall from my kid days on the farm.

    Here is a bulletin from the U of MN extension that gives some comparisons of weedy grasses, including quack, brome, and crab.

    http://www.extension.umn.edu/distrib...re/dg1137.html

  6. #6
    Silver Member
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    Kubota B3030 HSDC, Kubota ZD 18

    Default Re: How to selectively kill wide grass/crab grass.

    Thanks to all for the replies. Beenthere is correct in saying that I am pretty sure it is not crabgrass as it is not clumping. It is wide-stemmed and a different shade of green. It has really taken off in the warm weather leading me to think that it must be a warm season grass. I live in SE South Dakota.
    gh

  7. #7
    Elite Member smstonypoint's Avatar
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    Default Re: How to selectively kill wide grass/crab grass.

    Quote Originally Posted by gdh View Post
    Thanks to all for the replies. Beenthere is correct in saying that I am pretty sure it is not crabgrass as it is not clumping. It is wide-stemmed and a different shade of green. It has really taken off in the warm weather leading me to think that it must be a warm season grass. I live in SE South Dakota.
    gh
    Take a sample of the grass to your local Cooperative Extension office. They will identify it for you.

    Steve

  8. #8
    Platinum Member westbrooklawn's Avatar
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    North Carolina
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    kubota L3400HST

    Default Re: How to selectively kill wide grass/crab grass.

    Post emergent crabgrass herbicides are available... active ingredient MSMA is effective, but it must be mixed and applied exactly per label... (weather temperature is important too). County extension agent would be best bet for local advice.
    L3400HST, L463 FEL, Markham toothbar, Markham Grapple, Woods BH80-X, 5 1/2' United box blade,6' Leinbach scrape blade, Pallet forks, 5' King Kutter RM, 56" First choice tiller, Leinbach rake

  9. #9
    New Member
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    Default Re: How to selectively kill wide grass/crab grass.

    gdh.....obviously a picture would help but from your description it sounds like it might be nut sedge. Does it look like this?


  10. #10
    Silver Member 3BPercherons's Avatar
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    Near Lexington KY

    Default Re: How to selectively kill wide grass/crab grass.

    Quote Originally Posted by BruceWard View Post
    I have a lot more crabgrass than normal this year. Probably due a decrease in yard time due to 2 little ones.
    In our area (central KY) the explosion in crab grass this year can be traced to the drought of 2 years ago. Said drought resulted in many lawns thinning out, exposing more soil to the sun the following year, allowing more crabgrass than normal to survive and go to seed, resulting in my back yard being more crabgrass than not this year.

    No worries, though - I'll get 'em next year.

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