Help with disease identification

Discussion in 'Pesticide & Herbicide Application' started by rlmlandscape, May 11, 2013.

  1. rlmlandscape

    rlmlandscape LawnSite Senior Member
    Posts: 395

    Have a lawn customer that seems to have a disease spreading in her lawn. I do not do the applications for her property she has another company do them. One of my guys was there on Monday and she was pointing the spots out to him. I came to cut on Friday and the areas appear to be dead. Is this red thread or a form of fungus causing this. Turf grass disease is my Achilles heal so any help is much appreciated.

    2013-05-10 15.26.01.jpg

    2013-05-10 15.26.08.jpg

    2013-05-10 15.26.25.jpg

    2013-05-10 15.36.32.jpg
     
  2. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,929

    Not sure. Its early for red thread.
    http://plantclinic.cornell.edu/factsheets/redthread.pdf
    Top photo shows slight evidence of wheel tracks going left to right. Such tracks are an indication that it was mowed when dry. Its called "heat tracks". So I suspect that the lawn had some dry spots. Dig down in the soil and check for adequate soil moisture. Even if it is moist now, the problem could have occurred a few days ago and the grass has not yet recovered.

    Last photo looks a bit different. Is the irrigation running well? Could have been dry, but it is hard to tell what angle of slope you have. Is this the spot that gets the most sun? Injury also resembles what would happen if there was poor drainage in the spot. Or likewise if pool water overflowed into that spot. (Particularly if an algicide was used in the pool.)
     
  3. maynardGkeynes

    maynardGkeynes LawnSite Senior Member
    Posts: 409

    Photo 3 looks like brown patch lesions to me.
     
  4. rlmlandscape

    rlmlandscape LawnSite Senior Member
    Posts: 395

    To give some more info on the weather we have not had any hot days yet the temperatures for the past three weeks have been in the mid 60s with a day or two in the low 70s. We had a three week period of no rain up until yesterday and I am not sure if their sprinkler system had been turned on yet. I will call and find out today. I have also noticed a spot like this on another lawn yesterday and I will grab a photo of it today while I am there working.
     
  5. countryclublawnllc

    countryclublawnllc LawnSite Member
    Posts: 151

    Dig around a little and look for some grubs.
     
  6. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    Did it start last Fall??? Is it possible that it is a variety not yet fully alive from dormancy??? I still have areas that look that way, but I am not RI... :)
     
  7. jbturf

    jbturf LawnSite Bronze Member
    Posts: 1,413

    it been nearly 4 weeks with no precip in my area until several days ago, temps mostly 60-70 with a few 80 days, and a lot of windy days, this has equated to a lot of drought stressed turf around here, I suspect rlm you've had very similar. susceptible host + environment +pathogen

    I think riggles right also, ive seen heattracking from mowers very recently
     
  8. rlmlandscape

    rlmlandscape LawnSite Senior Member
    Posts: 395

    Thanks for the help. I'll take a look for grubs since this was a fear of mine but thought it might be to early for signs of them to start showing up still. This turf was very green and in good shape three weeks ago when we first started cutting. The decline in the turf has happened over the last two weeks. It is a new account and the areas were nice a green a couple weeks ago.
     
  9. Hissing Cobra

    Hissing Cobra LawnSite Senior Member
    Posts: 700

    I don't think this is a disease as I feel that it's a bit too early for those to be kicking in, especially without any moisture in the past 3 to 4 weeks. This looks like typical drought stress to me. Was the lawn fertilized a week or two before this damage showed up? The combination of the fertilizer breaking down without moisture being present for almost a month could have sent it over the edge. My guess is that these areas will recover with regular watering and a good mother nature soaking over the next few weeks.

    Things are very dry out there and according to the news last week, the potential for forest fires was very high for our area of Massachusetts & Rhode Island. Prior to the rain of the last few days, there's been nothing in the way of moisture. While you're checking for grubs, also be on the lookout for chinch bugs!
     
  10. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,867

    I was gonna say, probably drought stress. Esp by that pool.
     

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