Pls help novice in Orlando w/ St Augustine and sedge

Discussion in 'Pesticide & Herbicide Application' started by cegroves, Feb 16, 2008.

  1. cegroves

    cegroves LawnSite Member
    Posts: 1

    the lawn is established, but has sedge esp. green kyl (sp?) ... Scotts Bonus S first, or apply something like Image first? Thanks.
     
  2. bug-guy

    bug-guy LawnSite Senior Member
    Posts: 977

    sedgehammer works good
     
  3. PSUTURFGEEK

    PSUTURFGEEK LawnSite Senior Member
    Posts: 579

    sedgehammer will work fine but you might want to try Dismiss, it's an FMC product and has a much broader label.
     
  4. bug-guy

    bug-guy LawnSite Senior Member
    Posts: 977

    if you use dimiss go with the low rate for bahia
     
  5. RAlmaroad

    RAlmaroad LawnSite Silver Member
    from SC
    Posts: 2,216

    I did extensive tests on green kylinga last year. Used several products and methods. Sedgehammer will does a good job at a reasonable price and has to be used within 4 hours of mixing. BUT by far, Dismiss was the best overall in terms of the number of applications to control yellow and purple sedge and green kylinga. Get it while it is young and tender. Dismiss is very expensive but it does work.
    Image takes mulitple applications. Warning: Do not use on dormant grass.


    Roy
     
  6. A.T.A.K

    A.T.A.K LawnSite Senior Member
    Posts: 286

    Try Certinty Works better than Dismiss in my opion.
     
  7. Ric

    Ric LawnSite Fanatic
    Posts: 11,957

    Tim

    Certainty works great and is in the same chemical family as Sledge Hammer. But a word of caution about the mixed life of both Sledge Hammer and Certainty. When mixed in a lower pH water they only have a short life. However in a higher pH they will last for days on end. I add baking soda to my tank mix to bring in to 9.5 pH before adding the Certainty.
     
  8. A.T.A.K

    A.T.A.K LawnSite Senior Member
    Posts: 286

    Good to know Ric I have not heard that. With the price my guys only mix what isneeded for that job so product sitting has not yet been a factor. I will try the B soada
     
  9. Ric

    Ric LawnSite Fanatic
    Posts: 11,957

    Tim

    Sledge Hammer only has about a 4 hour half life in a low pH solution. But in an alkaline solution it will last for days.
     

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