Blasted Necrotic Ring Spot

Discussion in 'Pesticide & Herbicide Application' started by DA Quality Lawn & YS, Aug 7, 2011.

  1. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,847

    Good point but I am certain it is not pure KBG sod. Likely a good dose of Per Rye in there as well. It was already Heinz 56.......albeit cheap crap.
     
  2. Brown & Co.

    Brown & Co. LawnSite Member
    Posts: 134

    if its a repeating problem... and in a small area can you just cut it out and renovate it? Are you sure your treating for the right thing?
     
  3. RodneyK

    RodneyK LawnSite Senior Member
    Posts: 749

    I remembered on the Clearys 3336 that it was two apps three weeks apart at high rate in the fall that did it for me. But this lawn also gets preventative fungicide treatments throughout year.
     
  4. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    There's good money in treating the symptoms, but very little to be made if the disease itself was cured...

    The Squirt&Fert business, is a lot like the Medical Profession... :)
     
  5. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,847

    There are spots throughout the lawn, that are magnified when the hot July weather hits (disease flares up). Yes it is confirmed NRS.
     
  6. RigglePLC

    RigglePLC LawnSite Fanatic
    Posts: 11,788

    Retired now. But...it is a good idea to ask where the sod came from. You will eventually get an idea of which sod farm is infested. If you find a top-quality sod farm--resod the spots--or--resod the whole thing with top-quality disease resistant sod. The newer seed cultivars are much better.
     
  7. heritage

    heritage LawnSite Bronze Member
    Posts: 1,250

    DA,

    What is the P.H. of this clients water?
     
  8. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,847

    DK, he is on a different city water system than I am.
    Why do you ask? He doesn't water his lawn at all.
     
  9. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    http://www.extension.umn.edu/projects/yardandgarden/ygbriefs/p324necrotic-ring-turf.html
    "...The fungus survives winter in infected plant material. The disease is spread by plant to plant contact or mechanically with lawn equipment. The fungus becomes active during cool, wet periods in the spring and again in the fall. Grass sheaths and roots are infected and eventually killed...."
     
  10. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,080

    Also from the site:
    "... Necrotic ring spot frequently occurs on two- to five-year-old sodded lawns and is especially prevalent in vigorously growing lawns. These lawns often develop a thick thatch layer, which stimulates fungal growth. Necrotic ring spot is also common in lawns that have layered soil; one to two inches of topsoil laid down over hard compacted native soil, but not mixed together. This effect produces a lawn with shallow roots and poor drainage. "
     

Share This Page