lawn fungus

Discussion in 'Pesticide & Herbicide Application' started by retxab, Sep 29, 2011.

  1. retxab

    retxab LawnSite Member
    Posts: 25

    Need help identifying and treatment. New lawn, tall fescue, 2-4"round patches mushy grass with a little gray and black color .
    Thanks
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  2. Puttinggreens

    Puttinggreens LawnSite Senior Member
    Male, from southeast PA
    Posts: 376

    We need some Pics?
     
  3. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,111

    New lawn? Mushy grass? Is it exceptionally wet? Has weather been hot? Are the spots completely dead, depresed and slimey?
    If so, I vote for pythium disease.

    Bad news; it spreads fast under the right conditions, especially if you have ryegrass in the mix.
    http://www.ces.purdue.edu/extmedia/BP/BP-109-W.pdf
     
  4. retxab

    retxab LawnSite Member
    Posts: 25

    Its pythium how do I treat it?
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  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 12,111

    Sorry no personal experience treating pythium. Banol and SubdueMaxx are listed by university sources.

    AT temps over 85 degrees pythium can spread fast.

    But of course, if temperature drops 10 degrees, or if you can reduce excess wetness and poor drainage, that works, too.

    Do not water after 12 noon to reduce humidity during the nighttime period. Do not add nitrogen until temps cool off. http://www.apsnet.org/edcenter/intropp/lessons/fungi/Oomycetes/Pages/PythiumBlight.aspx
     
  6. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,873

    In summary, TERRIBLE season for turf disease this year.
     

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