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poa annua/triv problems

Discussion in 'Pesticide & Herbicide Application' started by smlc451, Aug 28, 2014.

  1. jbturf

    jbturf LawnSite Bronze Member
    Posts: 1,433

    Think quinclorac can also be harsh on fine fescues, ive seen it brown at full rate app
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  2. grass4gas

    grass4gas LawnSite Senior Member
    Posts: 473

    I agree except on the spring app. Spring app will have no effect on the Poa Annua. Fall pre at the appropriate time will control Poa Annua. If you don't apply it in the fall, then you have missed the boat as far as using the pre goes.

    Certainty will control Poa Triv in the spring but does affect some if not all fescues.

    FWIW...pre in the late fall and early spring will also control Japanese Stilt grass. May only need to spot spray later in the season for any breakthrough. Much cheaper and better results than trying to spray a boat load of this weed.
  3. foreplease

    foreplease LawnSite Bronze Member
    Posts: 1,939

    I've never heard of that one but searched for it. It looks DREADFUL. NCSU has lots of information if anyone else is unfamiliar with Japanese Stiltgrass, as I am.
  4. RodneyK

    RodneyK LawnSite Senior Member
    Posts: 754

    Yes, Grass4Gas you are correct. My bad. Spring app for other reasons. Thanks!

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