Stubborn Winter Weeds

Discussion in 'Pesticide & Herbicide Application' started by jgoddard8409, Dec 10, 2010.

  1. jgoddard8409

    jgoddard8409 LawnSite Member
    Messages: 51

    I have a couple of yards that have some bad patches of winter weeds.

    Any info on winter spraying (Charlotte Area we get warm days occ).

    Or just wait til spring......:sleeping:

    Thanks for the info
  2. daveyo

    daveyo LawnSite Senior Member
    from N.J.
    Messages: 907

    Depends on what type of winter weeds they are, is the weed going to proliferate before it dies back? I'm guessing definitely, that's what plants do, but that doesn't necessary mean you'll have to treat. Find out exactly what the weed is (if you don't already know) check to see whats the best management practice, then if you have to spray, spray at the exact proper time or you'll be wasting time and money not to mention other possible impacts.
  3. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,286

    Winter weeds?

    I have some - if I can clear the 12" of snow off the right area, I can find them petrified:)
  4. cgaengineer

    cgaengineer LawnSite Fanatic
    Messages: 15,778

    I sprayed one a couple weeks ago and although I got a great kill...another cropping of weeds came in and pissed on my parade.
    Posted via Mobile Device
  5. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,794

    Snow here. I don't understand the Charlotte climate conditions--do you mean winter annuals? Broadleafs? Grassy? In what grass? TF? Bermuda? ST Aug? Zoysia? Is it overseeded?

    Do you mean you forgot to spray in November? Unsuccessful treatment? New weeds came up from seed? Sprouted from roots or rhizomes?
    Wild garlic? Henbit? Poa annua? Hairy cress? Chickweed?

    Most weed sprays work only on the fast growing part of the weed--if its not growing--results will be very slow, if any.
  6. cgaengineer

    cgaengineer LawnSite Fanatic
    Messages: 15,778

    Man thats a lot of questions for a Saturday night.....
    Last edited: Dec 11, 2010
  7. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,794

    Boredom set in and I couldn't see the point of hitting the sack at 10:08. LOL! So why were you up at 11:30?

    CGA is that for Computer Graphic Animation? Culver Girls Academy? Corn Growers Association?

    Esters are usually recommended for cool weather--myself I am not convinced. Perhaps Speedzone, or some Quicksilver(works in 24 hours)(best for small weeds) would suit the OP's purposes. Use max rate and lots of surfactant to increase the power.

    I don't know much about Bermuda, but I have heard that, if it is fully dormant, Roundup is the way to go. You need local advice.
  8. cgaengineer

    cgaengineer LawnSite Fanatic
    Messages: 15,778

    I had just left my neighbors house from a warm fire and a few drinks...

    The C is for Chris...the GA is for Georgia.

    Be careful spraying RU on what some folks consider dormant bermuda...I have yet to see this mythical state of bermuda around may exist, but in all cases where I have heard or seen people using it, almost all resulted in dead circles come spring.
    Posted via Mobile Device
  9. grassmasterswilson

    grassmasterswilson LawnSite Platinum Member
    from nc
    Messages: 4,987

    you can spray winter weeds, but be aware that it may take weeks for the weeds to die. highs in the 30's have caused many plants to shut down and slow the absorption of AI.
  10. Chilehead

    Chilehead LawnSite Bronze Member
    Male, from Stockbridge, GA
    Messages: 1,968

    Several years ago, I first heard about LCOs spraying glyphosate on dormant bermuda to kill off winter weeds. I decided that before I do this on my clients' lawns, I better test it-on my own. About 3 weeks after the bermuda turned brown, I sprayed a 4 x 4 foot patch. The weeds died in about 2 weeks, but the grass was not "completely" dormant. I noticed that the 1/2" of grass shoot closest to the ground had browned out within the patch, but not outside the patch. I sprayed a separate 4 x 4 patch towards the middle/end of January, at which time there was NO green shoot at all (those weeds also died out in time--mainly poa annua). Fast forward to late April........
    The entire lawn came in fine, even the patch where I initially sprayed in December. That first test patch however took a little longer to fully green up, but by late May matched the rest of the lawn. I believe the key is to make sure the bermuda is absolutely dormant prior to an initial spray. Soil temps must be in the upper 30's or lower. This is just IMHO.

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