Any idea what this is?

Discussion in 'Pesticide & Herbicide Application' started by Gabby, Sep 11, 2007.

  1. Gabby

    Gabby LawnSite Member
    Posts: 140

    This is showing up on one of my lawns (friends lawn). Any ideas? Brown patch?

    IMG_0787_2_1_1.JPG

    IMG_0790_1_1.JPG
     
  2. Puttinggreens

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

    May be Pythium.

    What are the night time low temps, and humidity levels for the last three nights?

    Did the cool front reach your area yet?
     
  3. mdlwn1

    mdlwn1 LawnSite Silver Member
    Posts: 2,443

    looks like a burn from chem or something hot......
     
  4. Rtom45

    Rtom45 LawnSite Senior Member
    Posts: 456

    Can't tell real well from the pictures, but I would say red thread. Look early in the morning when there is dew on the grass. You should see pink fibers and a general overall appearance of pink if its red thread.
     
  5. Puttinggreens

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

    It is not red thread, the mycelium is still present on top of the turf canopy.

    Brown patch would not be this white and the mycelium usually sits lower in the canopy with brown patch.

    Look how lush the rest of the turf is. N levels are not low. It could be dollar spot, but again, dollar spot likes low N levels.

    Again we need to know the recent night time weather and type of grass we are dealing with.
     
  6. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    That is a topical burn of some sort Either chemical (gas, chlorine, herbicide, etc). It could have also been from someone setting a gas can down, or heat from an exhaust either sitting on it, or blowing on it. Anyone been running a Lawnboy mower on it? Chainsaw? I know I have a muffler on a Lazer that blows down toward the ground. Sitting long enough it would not surprise me if this happened.
     
  7. Gabby

    Gabby LawnSite Member
    Posts: 140

    Night time temps have been in the low to mid sixties. Humidity has been real high.
     
  8. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    Why do I not see the mycelium? What time of day was this taken? Have you looked at it early in the morning?
     
  9. Puttinggreens

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

    May be I am wrong, I did not ask what time the pic was taken.

    But that looks like cottony, white, mycelium in the photo. The pattern looks like pythium to me and it has been very humid in the northeast lately.

    I know I spayed a lot of Signature last week in anticipation of the current weather. Now he is 5 to 8 hours north of me so the weather could be quite different.

    Just taking a stab at it!!
     
  10. Puttinggreens

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

    Gabby, can you PM me and send me a higher resolution photo of the problem?
     

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