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Need Help Diagnosing Problem

Discussion in 'Pesticide & Herbicide Application' started by sniggly, Aug 11, 2005.

  1. sniggly

    sniggly LawnSite Member
    Messages: 190

    Need some help on this one folks. Attached are some pics, the first being of the backyard (mostly). It was taken to show how much canopy exists above the turf. The pics following in succession are merely closer, closer closer....you get the idea. Please take notice of the location of the damaged area in relation to the rest of the turf and canopy. Lack of sunlight?

    I am at a loss here. The area in question is not visually symptomatic of any turf harming event, other than a very small amount of grey leaf spot. Certainly not enough to cause this kind of damage. Soil test's (2) don't reveal anything that would be contributory to this either. Latest fert app was on 7/12/05, 8-2-16 50%PPSCU 6FE 2MN 1MG W/TALSTAR.

    Turf type is Palmetto (an improved variety of St. Augustine that is supposed to be shade tolerant). Per the customer installation was done approximately 7 months ago (I took a contract on it last month).

    Turf does not pull up, indicating to me the install was done half way decently.



  2. sniggly

    sniggly LawnSite Member
    Messages: 190

    Oh COME ON guys!.........no takers yet?
  3. ProLawns

    ProLawns LawnSite Senior Member
    Messages: 476

    Its a fungus. I can see spots on some of the blades that are being attacked. We have that problem with fescue but not our St. Augustine.
  4. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    I think you need to contact Cheryl. :D

    Just want to check, but is what I am seeing a straight line in the turf??? I know of no fungus that spreads in a narrow straight line. Chemical damage or burn can in fact look very much like fungus. My thinking is that this is some kind of spill. Could in fact a mower, of dropped something as it drove over it in that straight line.
  5. Ric

    Ric LawnSite Fanatic
    Messages: 11,969


    I talked to Cheryl and she suggests that some thing long a slender might of been Layed on the turf for several days.:D
  6. Greg Amann

    Greg Amann LawnSite Member
    Messages: 162

    You didn't apply any Speedzone did you?

    We had problems with it when it first came out when the label said safe to apply up to 90 degrees.

    Looks alot like that.

    I don't see enough gray leafspot on the blades that would justify that amount of melted off blades.

    We had several customers call last week with brown areas with streaks in the turf. When you get rain every afternoon and then go a week with none and temps. in the mid 90's, drought stressed areas show up. And then run a heavy mower over it and it causes mechanical damage that then stripes the turf.
    They think they have a disease that is being dragged by the mower.

    FYI The sago in the bottom right of the first picture has a manganese deficiency.
  7. sniggly

    sniggly LawnSite Member
    Messages: 190

    Yeah...people chimed in. That's what I'm looking for....but we are still missing the mark.

    No post emergent selective's labeled for turf (or otherwise) have been applied. I have had a solid week to think about this....and am stumped. Like I said before in the original post, this area isn't really visually symptomatic of any turf destroying event I am familiar with.

    It's been slow happening and my guess, and I emphasis guess, is there is simply not enough sunlight hitting this spot to support growth rates like you see on the rest of the turf in that area. I attached another picture.

    There may have been a fungus of some sort there prior to my taking the account but not now.

    Tell me what you think of this: I am not in the habit of making everyone think I know everything, consequently I have told the customer I am not sure I can diagnose this. I think I am going to get out the pole hedger and cut the canopy out of that bamboo (first pic up at top of thread) you see hanging over that part of the turf and see what happens.


    Where's tremor and some of the other older posters that used to be here?

    Hey Ric - Tell Cheryl if she has been laying on my lawns I'm gonna start carrying around a camera!!! That'll be fun! Tell ol girl I said hey and hope she is doing good. :waving:

  8. lawnservice

    lawnservice LawnSite Senior Member
    Messages: 589

    excuse this ignorant yankee...but was this installation of palmetto (which i know nothing about) sod??

    that last picture definately shows straight lines as Ric had mentioned
  9. sniggly

    sniggly LawnSite Member
    Messages: 190

    Yup...it's sod. Down here you can get several different varieties of St. Augustine grasses, often referred to as 'improved' varieties. The problem, or atleast rumored problem, with some of the shade tolerant varities is they are no longer shade tolerant becuase they are cultivated/grown in full sun. :dizzy:

    Here's the kicker though, the leaf blades on the shade tolerant varieties, for the most part, are thinner (not as wide), as a full sun variety (like Floratam).

    Who knows - certainly not me.
  10. sniggly

    sniggly LawnSite Member
    Messages: 190

    By the way - the line you see in the last pic posted is the edge of the sod install. My one beef with the person or company that installed it is that they just layed it on top of the ground without any effort being given to leveling with the rest of the turf. It's not that bad, the mower doesn't scalp it if you make the pass with one side on and one side off.

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