Discussion in 'Pesticide & Herbicide Application' started by ultracut518, Sep 22, 2009.

  1. ultracut518

    ultracut518 LawnSite Member
    Messages: 28

    I've been noticing a ton of rust in the lawns that I've been treating with broadleaf herbicide. Why is this? Thanks
  2. indyturf

    indyturf LawnSite Bronze Member
    from Indy
    Messages: 1,901

    it's a fungus caused by the weather conditions. a good shot of N will help. really wont cause any damage except to your shoes.
  3. ultracut518

    ultracut518 LawnSite Member
    Messages: 28

    Thanks for the reply. I understand that, but i'm only seeing this in my treated lawns, not my un-treated ones. Just curious why??
  4. greendoctor

    greendoctor LawnSite Fanatic
    Messages: 10,131

    Broadleaf herbicides are a stress on the grass. Varying types and combinations of stresses on a lawn may increase susceptibility to diseases. This effect is well known in warm season grasses. Certain types of herbicides increase the incidence of leaf spot diseases on st augustine.
  5. indyturf

    indyturf LawnSite Bronze Member
    from Indy
    Messages: 1,901

    The very best thing to do is over-seed with ky bluegrass. I bet you lunch that all the lawns you are seeing with rust are rye grass.
  6. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,807

    Rust is everywhere--not just treated lawns. A fall problem in many years. Many types of ryegrass are very susceptible. Plenty of water and extra nitrogen are a big help. Rust disappears about the time of frost. You may wish to overseed with a higher quality ryegrass--one that claims specifically to be rust resistant.
  7. mdlwn1

    mdlwn1 LawnSite Silver Member
    Messages: 2,443

    This is a really funny comment....and lunch multiplied by how many forum members?
  8. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,296

    Yep, bad rust this season, fought it myself. Weather conditions - not treatment, is the main factor.

    First frost is coming in a few weeks probably. Good bye, rust!
  9. Optimum Lawn

    Optimum Lawn LawnSite Member
    Messages: 234

    Can I get my free lunch too:laugh:

    Rust patches all over in my area as well (Fescues and Blue)
    My little 21" is covered in rust dust.
    Oh well will go away.. no harm no foul

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