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bamamatt

Help me identify this lawn disease please

BamaMatt
11 years ago

I am thinking this is dollar spot but not sure. I have bermuda grass. These spots came up about 6 weeks ago and I put out some Fertilome FStop which is suppose to help with dollar spot. I am not sure if it is preventive care if it will kill the fungus. Anyways, please tell me what I got and how to treat it. Thanks!

Here are some pictures....

http://i1166.photobucket.com/albums/q607/BamaMatt42/photo18.jpg?t=1345242220

http://i1166.photobucket.com/albums/q607/BamaMatt42/photo25.jpg?t=1345242199

http://i1166.photobucket.com/albums/q607/BamaMatt42/photo34.jpg?t=1345242177

http://i1166.photobucket.com/albums/q607/BamaMatt42/photo42.jpg?t=1345242143

Comments (8)

  • tiemco
    11 years ago

    A quick lesson on how to post pics directly in your post.

    Put this phrase, img src= , before your direct link url and enclose it all with these symbols, . Doing so to the links above give you this:

    {{gwi:114237}}

    {{gwi:114238}}

    {{gwi:114239}}

    {{gwi:114240}}

    Not really a warm season grass guy, but here's a good disease identifyer from NC state: http://turfdiseaseid.ncsu.edu/

  • BamaMatt
    Original Author
    11 years ago

    Thanks for tip but I thought you could only post one pic per post so instead of posting 4 times I linked it like that.

  • tiemco
    11 years ago

    You can post multiples if you use the codes, but not if you use the image upload box.

  • nearandwest
    11 years ago

    Yep, that looks like Dollar Spot, and it appears to be coalescing together in one area. As you are mowing, you are spreading the mycelium to other parts of your yard. You also need to make sure you wash off your mower after each use.

    Go get some Immunox from Lowes or Home Depot and apply according to label directions. I would suggest mowing the afternoon or evening before you apply, then apply Immunox early the next morning. Then do not water or mow for 24 hours. A repeat application will probably be needed 14 days after the first application. As I have stated on other threads, whenever I see Dollar Spot, I immediately think of a lack of Nitrogen, especially this time of year.

    Another way to tell if it is Dollar Spot is to go out to those areas early in the morning and see if they have a cottony, web-like appearance.

  • BamaMatt
    Original Author
    11 years ago

    Nearandwest, thanks for the help. I have done as you said. However 2 hours after application it came a huge rain, maybe it didn't wash away too much.

    Anyways, assuming that my application got into the ground, win another app in 2 weeks how long until this stuff goes away?

    Also, could I speed the process up by pulling up the infected areas by hand and spread some sand out over it?

  • nearandwest
    11 years ago

    "Also, could I speed the process up by pulling up the infected areas by hand and spread some sand out over it?"

    Trust me, you don't want to do that. It will not speed up the process.

    Unfortunately, 2 hours is not much time to allow the active ingredient to get into the leaves through the stomata. However, some did get in, so you should be patient and see if there is any effect on the disease. Do not apply any more Immunox in the 2 week period. I've heard of people damaging their turf by over-applying Immunox.

  • BamaMatt
    Original Author
    11 years ago

    Ok so far I have put out fungus control. 2nd application in a week will go out Saturday. The stuff I am using is FStop by Fertilome which says you can put out every 7 days. I had some left over from an application 2 months ago so I am just going to keep using it for now.

    My question would since dollar spot can be caused my low nitrogen should I leave my clippings on the lawn after cutting or will it help spread the fungus? I use a reel mower and the bag doesn't do great but probably gets 60% of the clippings. Thanks for your help.

  • nearandwest
    11 years ago

    Ok, I don't know anything about Fertilome F-Stop except what I read on the website, and that I see that it contains Eagle fungicide. Just follow the label directions.

    I would advise to leave the clippings on the lawn. Leaving them on the lawn is not going to cause the disease to spread, it's the mower that spreads the disease.

    Dollar Spot is caused by favorable environmental conditions such as excessive moisture and high humidity. Low nitrogen levels is just a symptom that I have noticed to be associated with the onset of Dollar Spot. I have noticed this coincidence through the tissue testing that I do regularly. Dollar Spot is normally a disease that we see in the Spring season here in the Carolinas.