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Zoyaia Grass - fungus - too much water

Discussion in 'Pesticide & Herbicide Application' started by ScottWaid, Jul 31, 2007.

  1. ScottWaid

    ScottWaid LawnSite Member
    Posts: 2

    My clients are in Austin Texas. I have several lawns with zoysia grass that is not doing well. We’ve been having record rains and I think some the lawns may not have the best drainage. THe grass has brown spots and is thinning. Last year, they were completely lush like a carpet.. Is there a fungus in the lawn and what should I do to treat this problem?

  2. txgrassguy

    txgrassguy LawnSite Gold Member
    Posts: 3,083

    What is the pattern of injury, systemic throughout the entire turf site or random patterning?
    Is the overall color kind of washing out to a pale green?
    With the amount of rain, leachates from fertilizer could easily be displaced from the soil causing an overall thinning of turf. Or it could be a soil or foliar insect attack, or it could be either Rhyzoctonia or Pythium - both of which attacks C3 and C4 (like Zoysia) turf grass.
    First thing is to submit a turf sample to Texas A&M in College Station, you can download their sampling/mailing instructions, as soon as possible.
    Once the pathogen has been cultivated, treat accordingly.
  3. Ric

    Ric LawnSite Fanatic
    Posts: 11,956


    Zoysia is a wonderful turf and can be kept Weed Free very easy. It is also drought resistance and has little insect problems. However Fungus is a problem on Zoysia that is fertilized and watered heavy.
  4. TforTexas

    TforTexas LawnSite Senior Member
    Posts: 260

    We have alot of Leaf Spot, Grey Leaf Spot and Brown Patch working in Austin right now due to the rain and unseasonably cool temps. I would treat the lawn with a broad spectrum fungicide like Revere or T-storm. They are labled for all the above and are available at the Lesco store in Austin.
  5. quiet

    quiet LawnSite Senior Member
    Posts: 720

    ...but know what you're treating, and why. I've just cleaned up a lot of dollar spot (very unusual here) with 21-0-0, and a lot of leaf spot with 5-3-2 Organic from UAP
  6. ScottWaid

    ScottWaid LawnSite Member
    Posts: 2

    THanks Ric. What can I do to eliminate the fungus? Is there a pesticide or will it go away by itself when the rain stops and the weather becomes Texas hot again?
  7. Ric

    Ric LawnSite Fanatic
    Posts: 11,956


    TforTexas gave a better detailed answer than I did. You may want to reread it.

    However Depending on the application equipment you have, You may want to apply a broad spectrum Fungicide After taking samples to be sent to the lab. A Skid Sprayer would be the quickest way to apply a fungicide that could start to work immediately. Zoysia advantages of slow growth also become a Disadvantage when trying to grow in a bad spot.

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