what is this and why can't it be killed?

Discussion in 'Pesticide & Herbicide Application' started by sailinstud420, Aug 18, 2005.

  1. sailinstud420

    sailinstud420 LawnSite Senior Member
    Posts: 343

    I sub out my fert stuff because I don't know anything about it nor do I want the headache. Anyhow, my fert man tells me that this grass cannot be killed, he tells me it is something other than crab grass. Please tell me what you think. He told me what it is but I do not want to bias anyone in anyway, I'll see what you pros think first. For your viewing pleasure here a few nice stripes I layed yesterday...



  2. Ric

    Ric LawnSite Fanatic
    Posts: 11,956


    Not being a cool season turf guy I maybe wrong. But from the pictures it looks like SEDGE. It appears to be more Sedge than Turf. Sedge is a water loving weed and is neither a Grass or Broad leaf and in classified in a group all to it's own. It grows from nutlets under ground that are in long chains. "Manage" and "Image" are two herbicides that will suppress it. But it takes Years of treatment to finally control it. If even one treatment is missed you lose ground with Sedge. It requires monthly treatment to finally get control. Chemical cost per treatment are over a $ 100 per acre. So maybe your chem guy doesn't want to try and deal with selling the high cost of treatment and lack of success if not done properly.
  3. lawnservice

    lawnservice LawnSite Senior Member
    Posts: 589

    I'd agree that it looks like yellow nutsedge. (it will have a triangular stem)

    it can be controlled (killed) but not with regular fert/herbicide applications. this will take a specialty product (manage does a good job, as already mentioned) and will cost extra.

    we have acheved very good control over nutsedge with just a couple of treatments
  4. Ric

    Ric LawnSite Fanatic
    Posts: 11,956


    Florida and New England have many difference. Therefore I maybe wrong about control in Cool Season Turf and tried to qualify my answer as such.
  5. lawnservice

    lawnservice LawnSite Senior Member
    Posts: 589

    i understand.
    if we have a situation where the lawn is being over watered (rare but we see it from time to time) then several applications will be in order.

    but for your run of the mill lawn that is a bit under watered and stressing from heat (seems like FL here this summer hot and humid, cool season grasses really gettin beat up) we've had good control with 2 apps using manage. (it will seem like 100% control after one app....then a few weeks later it explodes again and the second seems to be all thats needed. I assume thats due to our short growing season.)
  6. philk17088

    philk17088 LawnSite Fanatic
    Posts: 17,386

    Looks more like tall fescue
  7. lawnservice

    lawnservice LawnSite Senior Member
    Posts: 589

    pictures are hard to tell. but the first picture, if you look closely, you can see the 'ridge' (or triangle) on the blade of the plant

    might have been better to see photos before the mowing was done
  8. SodKing

    SodKing LawnSite Bronze Member
    Posts: 1,648

    yellow nut sedge up here would be a brighter green. WHat you have there is Tall Fescue. Corsair would control it though you have to make sure it is registered in your state.
  9. cemars

    cemars LawnSite Senior Member
    Posts: 387

    It looks allot more like a grass than nutsedge to me. The pictures show it recently cut, it would be easier to I.D. when it was a bit taller but I would guess dallas grass or barnyard, either of which can be controlled with repeat apps of MSMA at 10 day intervals.
  10. sailinstud420

    sailinstud420 LawnSite Senior Member
    Posts: 343

    some of you got it right, the fert man is telling me it is tall fescue. Is there a way to get rid of that or do you kill and replant like he is telling me?

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