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Brown patches - looked..ton of little worms??

Discussion in 'Pesticide & Herbicide Application' started by meets1, Sep 9, 2013.

  1. meets1

    meets1 LawnSite Gold Member
    Messages: 3,855

    Ok. Worm - grub. Started really small. Now at least inch long. I have put enough product on this lawn to treat 6 lawns. I see dead crickets, dragon flies, etc....there still here. Very heavy grass, alot of thatch - should it to power raked (dethatched) and mowed short to what I see in my eyes to break the barrier b/t these little pest and the granular to get down there? Also the irrigation is down to 2 days a week - should we shut it off completely. I have never had an entire yard with grubs - at best a little spot and that was it.
  2. countryclublawnllc

    countryclublawnllc LawnSite Member
    Messages: 153

    With it being so thatchy you might want to add a wetting agent to the mix to help it work its way down into the thatch/soil interface where the grubs are feeding. Then pound it with water.

    Good luck,

  3. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,708

    Remember any of the "thrins" as insecticides will not be effective. The thrins (synthetic pyrithroids) do not penetrate the soil more than a quarter inch. Not suitable for grubs--regardless of advertising claiming it works.
    Grubs are hard to kill when they reach this size; dylox is the best bet. It must be watered in with about a half-inch of water to carry it down to the grub depth. Run the irrigation about an hour. Run irrigation also for a few minutes prior to application of dylox for best results. Use the maximum the label allows.

    Next year use a grub control preventative about July 4th.

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