Spot spraying with roundup on dormant centipede

Discussion in 'Pesticide & Herbicide Application' started by LawnsharkMB, Jan 19, 2013.

  1. LawnsharkMB

    LawnsharkMB LawnSite Senior Member
    Posts: 545

    Is it safe? I've been told that it is and that it isn't.
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  2. imow in NC

    imow in NC LawnSite Member
    Posts: 56

    Hey, I am in Wilmington, NC only a few miles away. What is it you are trying to kill off?
     
  3. LawnsharkMB

    LawnsharkMB LawnSite Senior Member
    Posts: 545

    Actually I've already done it. I worked at a golf course for a couple years and we would spray barricade and roundup in the rough (bermuda) starting in mid February. I recently spot sprayed an entire property of centipede with Prosecutor 3oz./Gal. Now I'm reading online that its not safe to spray glyphosate on dormant centipede, st Augustine, or zoysia. Weeds were mainly cudweed, tall fescue, poa, and henbit.

    Now I'm worried I will have a bunch of dead grass come spring time.
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  4. imow in NC

    imow in NC LawnSite Member
    Posts: 56

    This time of year I am using a mix of Atrazine 4L / Manor / and or southern speedzone. that way i can do a little pre and post at same time.
     
  5. LawnsharkMB

    LawnsharkMB LawnSite Senior Member
    Posts: 545

    I'll have to try that. What do you think about the glyphosate on dormant grass?
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  6. imow in NC

    imow in NC LawnSite Member
    Posts: 56

    Dormant grasses are not dead grasses. just the leaf material is brown. Roots very much alive. roundup kills to the roots.
     
  7. LawnsharkMB

    LawnsharkMB LawnSite Senior Member
    Posts: 545

    Great. Thanks.
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  8. grassmasterswilson

    grassmasterswilson LawnSite Platinum Member
    from nc
    Posts: 4,468

    Centipede rarely goes fully dormant like Bermuda here in nc. You may have some dead steaks come green up time but should recover.

    I'd never use round up on anything but fully dormant Bermuda.
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  9. Smallaxe

    Smallaxe LawnSite Fanatic
    Posts: 10,081

    Gly kills to the roots,,, but I thought it only gets to the roots systemically through the actively growing leaves... When the leaves are dormant and brown there is no longer any translocation from the above ground material to the below ground material...

    Plz let us know how your spraying worked out... If it killed the weeds and If it harmed the lawn grass in any way...
    This question has been kicked around for years now and nobody seems to have any anecdotal info about it... the Official Info. is strictly CYA... :)
     
  10. imow in NC

    imow in NC LawnSite Member
    Posts: 56

    Weed Control
    Apply preemergence herbicides to control crabgrass, goosegrass, and foxtail. Apply by the time that dogwoods are in full bloom. Apply postemergence herbicides in May as needed for control of summer annual and perennial broadleaf weeds such as knotweed, spurge, lespedeza, etc. Do not apply until 3 weeks after greenup. Centipedegrass is sensitive to certain herbicides (e.g. 2,4-D), so follow label directions and use with caution. VIA Turf Files at NC state.
     

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