Final Cuts for Season 1.5”.

Discussion in 'Lawn Mowing' started by Turf Tracer, Oct 19, 2019.

  1. OP
    OP
    Turf Tracer

    Turf Tracer LawnSite Fanatic
    Messages: 5,883

    Right. Lawns that are left long here generally far more prone to snow mold. Leaves and tree debris also contribute which is why we often still pushing Oak leaves in light snow cover in Dec.

    There are likely other factors and probably depends on snow cover times in your area.
     
  2. Mark Oomkes

    Mark Oomkes LawnSite Fanatic
    Messages: 19,637

    Was reading the wrong link first:

    Gray Snow Mold
    In areas with permanent snow cover, gray snow mold or
    typhula blight caused by Typhula incamata or Typhula
    ishikarensis is a very destructive disease of turfgrass. Turfgrass
    species which are susceptible include bentgrass, annual
    bluegrass, fescues and perennial ryegrass.
    Although having permanent snow cover on the ground
    for several months is necessary for typhula blight to develop,
    other conditions that stimulate cover, such as leaves,
    mulch and desiccation 'cover/ can cause the same effect.
    The gray snow mold fungus generally grows and infects
    turfgrass when temperatures range between 30-50 degrees
    Fahrenheit. The effects of gray snow mold are worst when
    snowfall occurs on unfrozen turfgrass which has not yet
    been "hardened" by frost. When snowfall occurs on frozen
    ground, the disease usually does not develop until the following
    spring, when snow begins to melt.
    As this snow melts during spring, the typhula blight fungus
    can be seen with the naked eye as sclerotia. These
    spores will eventually dry up and no longer be visible.
    The sclerotia, which are the dormant state of this disease,
    allow the typhula blight fungus to survive over the summer.
    They are resistant to warm temperatures as well as
    the fungicides used in summer spray programs. With the
    coming of cool, wet weather during the fall, these sclerotia
    will swell, germinate and produce new spores.
    Pink Snow Mold
    Pink snow mold (Microdochlum nivalis—formerly Fusarium
    nivale), is also a devastating turfgrass disease in
    regions that have long periods of cool wet weather with frequent
    "snow-falls" and "snow-melts" This disease organism
    does not need a permanent snow cover to germinate
    and infect turfgrass. Pink snow mold can be observed in
    the late fall through spring if weather favors germination
    and growth of the spores.
    Fungicide treatments used for snow mold control are
    longer lasting than similar treatments made to control
    summer diseases. This is because with snow mold applications,
    the fungicides are not removed through mowing as
    the turf grows. In fact, single applications usually provide
    winter-long control, assuming that permanent snow cover
    is maintained until spring. Mid-winter thaws can dissipate
    fungicide efficacy due to exposure to sunlight, wind, and
    rain. They can also accelerate snow mold growth. If a thaw
    does occur, a second fungicide application is recommended
    to maintain turf protection until spring "green-up."
    Cultural and Chemical Control
    Cultural management of these diseases should always be
    considered in any control program. Be particularly aware
    of conditions that favor disease development during the late
    fall and winter months, such as poor drainage, excessive
    thatch, high nitrogen fertility and high relative humidity.

    Also, keep in mind that both gray and pink snow molds can
    occur in the same location.

    By JIM MERICK & TOM VRABEL, Ph.D.
    CHIPCO® Development Team
     
    Ridin' Green likes this.
  3. OP
    OP
    Turf Tracer

    Turf Tracer LawnSite Fanatic
    Messages: 5,883

    It says leaves can cause mold so it follows long matted down grass can as well which is what the Scotts site indicates and exactly what we see here when snow melts in Spring.

    A few years ago it snowed heavy and stuck for entire Winter late Nov right during the Big Oak Drop . Almost every lawn had some degree of mold
     
    Last edited: Oct 25, 2019
  4. Wye Oak Tree

    Wye Oak Tree LawnSite Fanatic
    Messages: 6,034

    A LCO was caught mowing a customers yard here in mid January.

    The owner came out and asked the guy mowing "what the heck are you doing mowing this time of year?"
    The LCO responded "I'm mowing now to prevent snow mold" :rolleyes:

    They were fired on the spot.
     
  5. Doc8406

    Doc8406 LawnSite Fanatic
    Messages: 23,286

    or "i'am blowing the snow off your yard to prevent snow mold"!
     
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  6. Ridin' Green

    Ridin' Green LawnSite Fanatic
    Male, from Michigan
    Messages: 22,234

    The first rain will almost always get rid of it if you don't get out an blow it loose etc.
     
    Doc8406 likes this.
  7. Ridin' Green

    Ridin' Green LawnSite Fanatic
    Male, from Michigan
    Messages: 22,234

    Cutting at 3-3.5" is hardly what a sane person would call long grass. If you believe that difference of only 1.5" in grass length is going to make much difference, I have some ocean front property in Kansas I'd like to sell ya.
     
    Mark Oomkes likes this.
  8. OP
    OP
    Turf Tracer

    Turf Tracer LawnSite Fanatic
    Messages: 5,883

    We don’t cut it short to prevent snow mold. It’s cut short to facilitate easier leaf removal. Snow mold occurs here on lawns left long, generally not cut in Oct at all, that get matted down at first snowfall. The mold on these lawns is a direct result of the long grass.

    Any maintained lawn would be cut at least at 3” in late Oct here and would probably not produce mold.
     
  9. Ridin' Green

    Ridin' Green LawnSite Fanatic
    Male, from Michigan
    Messages: 22,234

    Back when I used GT's for my mowing operation exclusively, I cut at 2.5 - 3" for fall leaf clean up, and I still had mold come spring. It isn't just a function of HOC. To claim otherwise shows a lack of honesty or just the desire to debate it to death.
     
    Mark Oomkes likes this.
  10. OP
    OP
    Turf Tracer

    Turf Tracer LawnSite Fanatic
    Messages: 5,883

    Lawns left long enough to get matted down and or lawns that have tree debris on them prior to the first snow cover have a significantly higher probability of showing mold come Spring.
     

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