Black Lawn Death

Discussion in 'Lawn Mowing' started by toddco, Sep 17, 2003.

  1. toddco

    toddco LawnSite Member
    from Seattle
    Posts: 56

    Okay, I need some help on this. The whole lawn here was brown just a week ago. We had nearly no rain all summer. Now that the rain came there are huge patches of black but everything else greened up.

    These were the first spots to turn brown in the summer. Any ideas?

  2. toddco

    toddco LawnSite Member
    from Seattle
    Posts: 56


  3. tiedeman

    tiedeman LawnSite Fanatic
    from earth
    Posts: 8,745

    if you can, get a close up of a couple blades of grass
  4. TRex

    TRex LawnSite Senior Member
    from DFW ,TX
    Posts: 487

    Weird kind of looks rusty.
  5. John Gamba

    John Gamba LawnSite Fanatic
    from ct
    Posts: 10,812

    Thats what are crabgrass looks like when it gets cooled and dies.
  6. toddco

    toddco LawnSite Member
    from Seattle
    Posts: 56

    It would surprise me if it was crabgrass. The blades are finer, and I've got plenty of healthy crabgrass still elsewhere. :(

    These patches were the first spots to brown up when the weather started getting dry - if that gives any clue.

    Thanks for any ideas.
  7. NickN

    NickN LawnSite Bronze Member
    from Alabama
    Posts: 1,010

    Is there a septic tank buried there?
  8. pcnservices

    pcnservices LawnSite Senior Member
    Posts: 614

    What do the other lawns in the neighborhood look like? Were'nt there some aerial pollution from a plant nearby that washed down with the rain and deposited on these lawns? I dont know, I'm just thinking maybe it's something worse than the usual disease or whatever????
  9. toddco

    toddco LawnSite Member
    from Seattle
    Posts: 56

    The other lawns in the neighborhood look good.

    There isn't a septic buried there but I was suspicious if rocks or other poor soil conditions caused it since it was the first area to turn brown as the summer temps and dry weather came earlier this year.

    It just surprised me how it turned black once the rains came last week. Everything else went from brown to green.
  10. NCSULandscaper

    NCSULandscaper Banned
    Posts: 1,557

    Perhaps pythium blight????

    Description of pythium blight is as followed:
    disease is first seen as small, irregularly-shaped, watersoaked, greasy patches 1 to 4 inches in diameter. A cottony growth may be visible early in the morning. Diseased areas spread rapidly and may eventually range from 1 to 10 feet in diameter. Pythuim blights develop best in warm, wet weather. The disease is most severe on grass grown under high nitrogen fertilization and excess moisture.

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