A Mushrooming Problem

Discussion in 'Pesticide & Herbicide Application' started by W5BLT, May 14, 2002.

  1. W5BLT

    W5BLT LawnSite Member
    Messages: 5

    Hi All! I've been reading this forum for quite some time and have really enjoyed all of the great suggestions and help that is offered here.

    I've got this problem I hope someone can help me with. About 3 years ago, I replaced my lawn. I tripple killed everything and then had about 15 yards of new sterilized soil brought in. Then I put in a great sprinkler system and then seeded the lawn with ninjafica (sp?). Anyway, the grass looked great and I was one happy camper.

    That is, until I had these mushroom that started cropping up. I thought at first that it may have had something to do with over watering. I gauge the sprinklers run only twice a week giving me 3/4" each time for a total of 1 1/2"/week. Still, the muchrooms commeth fourth. I've even tried to stop watering all together for several weeks thinking that I can kill them with the lack of water. No such luck. As soon as I start watering again, their back in full force. It started out where they were only in about one sq. ft. of area. Now, they occupy about 5 sq. ft.

    The local nursery folks can offer only one suggestion. They say that I'm overwatering. I just can swallow that. No one can suggest anything that I can apply or do to get rid of this mushrooming problem. :angry:

    I'm at my ropes end and I need help. The only thing that I can think to do is to kill this entire area of the lawn and reseed it. I REALLY don't want to do this.

    Any suggestions? I could post some pictures this evening if it would help.

    Thanks in advance.
  2. KirbysLawn

    KirbysLawn Millenium Member
    Messages: 3,485

    What time do you water?

    What are the temps at night?

    What kind of grass?
  3. tremor

    tremor LawnSite Bronze Member
    Messages: 1,476

    Those mushrooms probably aren't causing any real turf damage are they?

    Mowing is usually all that is required to rmove mushrooms.

    Some fungicides used to be labeled for control of mushrooms, but I know of none that still are. I think Mancozeb worked but don't hold me to it.

    Heritage is labeled for control of Fairy Rings which "could" be part of the cause. Do to it's very unique chemistry, I'd guess that Heritage would at least supress mushrooms. I can't legally recommend it that way since it's not specifically labeled, but I know what I'd do.



  4. lawnstudent

    lawnstudent LawnSite Senior Member
    Messages: 472

    Mushrooms are feeding on organic matter. What type of soil did you place on your old lawn, organic soil? What type of fertilizer do you use, organic fertilizer? I get mushrooms on my lawn when weather conditions are moist and in the shade of trees. I use organic fertilizers in these areas. Where I don't use organic ferts, I don't get the mushrooms. As usual, Tremor is right. Mowing should take care of the shrooms.

  5. W5BLT

    W5BLT LawnSite Member
    Messages: 5

    OK, I'll try to answer all the questions.

    KIRBYSLAWN: I water usually between 4am-6am, night temps average about 42-48 degrees, Ninja Fescue (tall)

    LAWNSTUDENT: I don't know. It was 3 years ago. At my age, I'm happy to remember what happened this morning.

    TREMOR: Damage? Well, this stuff is spreading like a cancer.

    I'm using Scotts Lawn Pro, Super Terf Builder 29-3-6

    Hope I answered them all. Also, if you'd like to see what I'm talking about, check out this LINK. These are a little "wilted" now. When they come up, they're nice and white and about 2-3" tall. These pictures are after not mowing for about 10 days. I'm getting ready to mow tonight. If it runs true to course, I'll mow and water tomorrow morning and within 2 days, I'll have a brand new crop.

    Help! :cry:
  6. HBFOXJr

    HBFOXJr LawnSite Bronze Member
    Messages: 1,712

    1. Are they edible?
    2. They are not a lawn pest so who cares.
    3. Was the sterilized soil from a mushroom farm?
    4. Identify this particular mushroom, learn its culture, habitat etc and then do something it doesn't like if it would not be detrimental to the lawn.
  7. tremor

    tremor LawnSite Bronze Member
    Messages: 1,476

    OK, now I'm concerned. By the looks of the photo, it appears as if the mushrooms are in the vicinity of tree roots. If large quantities of soil were place over the tree roots three years ago, the tree roots may now be dying. The decaying roots would contain sufficient organic matter to fuel the mushroom blooms following rains or irrigation.

    Might the soil have been added to cover roots? The trees could easily be outcompeteing the turf for sunlight. As shade tolerant as Tall Fescue is, the trees will win every time. Unless of course, the roots are dying from a lack of oxygen.

    Some soil borne root diseases affect trees. Especially when good turf cultural practices alter the normally drier environment that some tree sppecies require.



    MATTHEW LawnSite Senior Member
    from NE OHIO
    Messages: 665

    I agree with TREMOR. Mushrooms are the fruiting bodies of rotting organic matter. Old tree roots will cause this problem for many years with the right conditions. Cool, wet conditions will stimulate spore growth and mushroom production.Watering at 4-6 AM is not recommended, as it promotes the spread of every kind of fungus growth available.( Helminthosporium-leaf spot- in particular) As far as mowing them goes, I don't like that control method. When the blades hit them, they splat gooey gunk everywhere. You did not say how often you are watering. If you water every night, you need to change that. Light, frequent watering promotes fungi and can cause shallow rooting. You should have one or two deep soakings done right at sunrise to get the best results. Let there be wet & drying cycles to moderate the process. Good luck.
  9. W5BLT

    W5BLT LawnSite Member
    Messages: 5

    MATTHEW: I've added a couple of pictures to that web page. It shows the tree a little better. I think that it's called a "silk tree". But, I'm not sure. I usually water 2 times a week. I've got it gauged to water 3/4" each time for a total of 1 1/2"/week.

    The roots are fully covered and the mower does not come in contact with them. When I originally put the top soil on, I tried to take paticular care not to add too much to the top around the trees. Maybe 1-2" at best. However, no roots were ever showing. I'm just about to the point of watering only once per week. But, I think that the lawn in the heat of summer will dry it out too much.

    You guys (or gals) have got me worried now about the root rot stuff. How would I know for sure if this is the case? BTW: I live in N. CA near SF if that gives you an idea of the thermal region.
  10. ADG44

    ADG44 LawnSite Member
    Messages: 1

    My Grandfather lived for a number of years in Concord, CA!
    Now about the shrooms - has anyone mentioned Fairy Ring? It is a basidiomycete that basically eats and releases nitrogen. Is ther a green ring around it?
    Anyway - another tip would be to take a tine fork and areate around the mushroom circle.
    If it is fairy ring - let me know there are a few things you can do

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