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Leaf Spot

Discussion in 'Pesticide & Herbicide Application' started by rcreech, Jun 25, 2008.

  1. rcreech

    rcreech Sponsor
    Male, from OHIO
    Messages: 6,163

    I have a customer that seeded part of his front lawn this spring and it was a Ryegrass lawn, but I had him overseed it with TTTF.

    I just fert and sprayed it last week and it looked pretty good.

    The customer then called me today and was very upset and stated his lawn was dying.

    When I get there I see a brown lawn with green grass in spots.

    Come to find out the green grass was the new TTTF and the brown grass was the PR.

    I freaked out at first as I thought maybe I mixed up my 3 Way too hot or something...but the neighbors lawn that I did with the same tank looked awesome!

    Anyway...looking at the Rye I found brown lesions and the grass is hurt bad. Called my Lesco man and he stated it was leaf spot.

    I called my customer and asked him about his watering schedule and he said he was watering about everyother night (guess he doesn't read my newsletters about how to water a lawn :laugh:).

    Anyway...will the lawn come out of this? I mean it doesn't look good right now!
  2. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,727

  3. rcreech

    rcreech Sponsor
    Male, from OHIO
    Messages: 6,163

    Thanks Riggle!

    Do you think the lawn will make it?

    Should I use a fungicide or just sit back and watch?
  4. heritage

    heritage LawnSite Bronze Member
    Messages: 1,358

    Actually sounds like Pythium (damping off) where it is Brown and all dead. Happens on the late seeding when nighttime temps above 65F.

    Double Check it because it will need a special Fungicide like Subdue.

  5. rcreech

    rcreech Sponsor
    Male, from OHIO
    Messages: 6,163


    The seedlings are very healthy....as it is only the established PR that is being affectected. The new TTTF seedlings are the only healthy grass in the front lawn.
  6. heritage

    heritage LawnSite Bronze Member
    Messages: 1,358

    OK Rcreech :)

    The Leaf Spot is really severe here on Older PR Cultivars this year.

  7. golfguy

    golfguy LawnSite Member
    Messages: 108

    I struggle with leaf spot in my roughs. I have never applied a curative fungicide application and as of yet (knocking on wood) have never lost any grass because of it.

    I do feel that there is some connection between the application of herbicides and the onset of Leaf spot. Unfortunately, I am not just exactly sure what it is.
  8. greendoctor

    greendoctor LawnSite Fanatic
    Messages: 10,003

    Triazine herbicides can increase the incidence of leaf spot on st augustine. I have observed an overall increase in disease in bermuda and seashore paspalum treated with broadleaf herbicides. This of course, is aggravated by turf maintained on less than 1/2 lb N and K per month of growing season. Choice is simple for me, starve the lawn in the name of being politically correct and have to apply more politically incorrect fungicides or feed the lawn, keep it vigorous minimizing the need to apply anything with an EPA reg number.

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