Powdery Mildew options

Discussion in 'Pesticide & Herbicide Application' started by JLC, Jun 21, 2001.

  1. JLC

    JLC LawnSite Senior Member
    from IA
    Posts: 467

    I'm seeing quite a bit of powdery mildew right now. I hate to just do blanket apps of fungicide to control this. At what point do you apply fungicide? On some lawns it has historically thinned the turf and I've had to reseed. I didn't have my applicators license until this year and now that I can do an application I will, if needed. I know that fungicide can damage good microorganisms as well as bad, so it seems like a last resort. I'd appreciate any help.
     
  2. powerreel

    powerreel Banned
    Posts: 481

    HORT OIL.


    Hort oil will help with mildew, so will baking soda, as will baby powder. Safe alternatives..... IPM works best, if disease has set in your cultural methods are off and your plants are suffering from a lack of something or are in the wrong place or something to that extent. Stay away from fungicides unless you are competent in their use, they give you cancer and are expensive, they also are toxic to marine life.
     
  3. JLC

    JLC LawnSite Senior Member
    from IA
    Posts: 467

    Thanks powerreel. I would assume that you just sprinkle the baking soda of powder on the leaf right?
     
  4. KindGardener

    KindGardener LawnSite Member
    Posts: 186

    Spray a solution of water, Baking soda and horticultural oil. Coat the surfaces (the oil acts as a spreader/sticker).

    Thought I suppose you could just dump a box on the leaves! (control your acid pH as well) just kidding!



    Here's more info on Baking Soda:

    http://www.attra.org/attra-pub/bakingsoda.html
    http://www.hort.uconn.edu/ipm/homegrnd/htms/51pmorn.htm

    My local retail nursery also recommends, as a "less toxic" approach(less than common fungicides) Green Light Rose Defense (neem oil) for powdery mildew. I've use it - it works.
     
  5. KindGardener

    KindGardener LawnSite Member
    Posts: 186

    Spray a solution of water, Baking soda and horticultural oil. Coat the surfaces (the oil acts as a spreader/sticker).

    Thought I suppose you could just dump a box on the leaves! (control your acid pH as well) just kidding!



    Here's more info on Baking Soda:

    http://www.attra.org/attra-pub/bakingsoda.html
    http://www.hort.uconn.edu/ipm/homegrnd/htms/51pmorn.htm

    My local retail nursery also recommends, as a "less toxic" approach(less than common fungicides) Green Light Rose Defense (neem oil) for powdery mildew. I've use it - it works.
     
  6. UrbanEarth

    UrbanEarth LawnSite Member
    Posts: 142

    If there is any way to increase the air flow in the affected area, this will help. It dries things out, so the mildew cannot grow.

    Alan
     
  7. JLC

    JLC LawnSite Senior Member
    from IA
    Posts: 467

    I've trimmed up trees on some properties this spring in the affected areas in attempts to promote more sunlight and increase air circulation and it has helped. The problem is not that bad, but I think it will still affect the turf density. Is this correct?
     
  8. GreenStar

    GreenStar Banned
    Posts: 114

    wait untill a dry day,knock it off with a broom
     

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