Grass Disease? HELP!

Discussion in 'Lawn Mowing' started by Acute Cut, Oct 15, 2001.

  1. Acute Cut

    Acute Cut LawnSite Senior Member
    Posts: 980

    Ok, i have a MAJOR issue in my lawns. Actually this seems to be a county wide eppidemic. This disease has overtaken most every lawn. No matter the cutting height or weather or not the lawns are fertalized. I posted it on my website so yall can see pics of it. There are three pics. What i dont have a picture of is the recent developments of the grass. The ends of the "dead" grass seems to be growing new grass but instead of one strong blade it is like five weaker ones that are growing out sideways. . the link is:

    If i cut the grass shorther then it just shows the LARGE brown spots of dead grass. Also, i have pulled soil samples to check for thatch. A few yards have some thatch, but most have very little thatch. The ones that do hve it are still within the allowed peramiters.

    Thank you guys (and gals) very much for any assistance you can offer.

    Acute Cut
  2. Looks like Red Thread.

    Power rake infected areas if possible.

    Remove all clippings.

    Apply one lb of N per 1K sq ft.

    I rarely get any turf diseases on property I manage do to superior agronomic practices.
  3. LoneStarLawn

    LoneStarLawn LawnSite Bronze Member
    Posts: 1,415

    Do the spots look like they are covered with "webs" in earlier mornings with heavy dew? I'm thinking it is Dollor Spot...
    I could be wrong.

    Lack of fertilization can cause dollor spot (lack of nitrogen)
  4. Acute Cut

    Acute Cut LawnSite Senior Member
    Posts: 980

    it does sort of look like a web in the morning. Especially with the way the new grass is growing in. There seems to be like five new grass blades extending from the top of the dead stems now. It is very ugly too look at.

    Doesnt red thread have a redish tint to it? This just looks like dead grass blads and stems that have just died and then split all apart or something.

    I have powerraked one lawn and it didnt seem to tear out too much of the dead stuff. I was not happy with the results either way. If it is red thread then it is in eppidemic proportions.
  5. lawnboy11

    lawnboy11 Banned
    Posts: 181

    I'm not sure, but it sounds like it might be patches of bentgrass. It's hard to tell from the picture. Bent grass is used on golf greens and looks best cut very short and vigorously maintained as on a course. In a lawn it's a weed usually, at least in the northeast. Anyway, I'm not sure that's what it is, but it sounds and kinda looks like it.
  6. Runner

    Runner LawnSite Fanatic
    Posts: 13,494

    I'm not real sure, because I can't tell the texture of the grass by the pictures, but what it looks like to me, is bentgrass. It is just starting to go dormant, is all. This will turn like this when that happens, and it goes dormant long before many other grasses do.We have it all over around here, too. Do you have a cooperative extension service around you? Take some in to them, and see what they say. I'd be curious to know as well. In the meantime, I'm going to print off some copies of your pics, and I'll ask my friend, John. He'll know.;)
  7. LoneStarLawn

    LoneStarLawn LawnSite Bronze Member
    Posts: 1,415

    If you are sure it is a disease then I still think it may be dollar spot...
    From your description does some of it look like this?...


    When dew is present on grass blades in the morning and dollar spot is active, a grayish white, cobwebby growth of fungal mycelium will be seen


    If this not present then it may be something else.
  8. wmsland

    wmsland LawnSite Member
    from NE OHIO
    Posts: 127

    Your picture sure looks like you have a really nasty grassy weed called Nimblewill. It grows in patches, and resembles bentgrass. It goes dormant this time of the year and turns white or brown. The worst part is that it is very difficult to control. It doesn't look so bad in the summer when it's green, but really sticks out this time of the year, not a whole lot that can be done about it.
  9. Acute Cut

    Acute Cut LawnSite Senior Member
    Posts: 980

    not leaf spot
    not red thread
    i pulled out the big book of diseases i have and crossed those two off. There never was any sort of spotting or discolorization other than the whole thing just dying off as you see it in pic one. This problem has only come about as of last fall, but i only saw it on one or two accounts. now i see it EVERYWHERE i go. People are calling me up from all over the place asking me about it. (people meaning not my regular customers)

    I see it mostly in lawns that are cut higher i guess. those cut lower just have the tops cut off so it is harder to see. I mow at 3-3.5 on my lazer and at level 3 on my wb. Whew, i feel so much better knowing i have finally found some help. Thank you, thank you, thank you.
  10. GroundKprs

    GroundKprs LawnSite Bronze Member
    Posts: 1,969

    I'll run with Runner. It sure does look like bentgrass. Notice that the bluegrasses in the pics are not affected. You could have had something that affected only the bent, or it is going dormant. Doubt very much it would have been dollar spot in your area now, DS is a hot weather problem. (But it's always hot in TX, right Lonestar?)

    I would expect red thread would have also affected the bluegrass. If it has been very cool in your area, perhaps snow mold could have gotten the bent. Best to check with your turfgrass extension specialist for recent or ongoing regional problems.

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