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permanent nutsedge control

Discussion in 'Pesticide & Herbicide Application' started by mrkosar, Aug 3, 2008.

  1. mrkosar

    mrkosar LawnSite Senior Member
    from Ohio
    Messages: 680

    i've sprayed sedgehammer the past two years on a few properties and it kills the nutsedge for the year, but it comes back in the same spot the next year. a few of the areas have actually gotten worse. has anyone had this problem? what to do about it? is there a way to permanently kill it?
  2. robertsturf

    robertsturf LawnSite Bronze Member
    Messages: 1,406

    The problem with Nutsedge is the nutlets that are in the soil. When they are saturated the sprout. With a lot of rain or improper watering practices they come up. You will notice this in areas that are prone to staying wet. Down spouts, low areas and areas where the water sets for long periods of time. Timing is also a key for controlling Nutsedge effectively. Too early it comes back, too late the plant shuts down and all you get is the plant above groung. It is a bad problem this year around the Midwest due to record rain-falls.
  3. RigglePLC

    RigglePLC LawnSite Fanatic
    Messages: 13,553

    Our nutsedge grows whether soil is wet or dry. If there are a lot of roots and nutlets i suspect that more than one treatment may be needed. I just treated a big clump across the street from my house--used Manage (now called Sedgehammer). Included wetting agent. The solution was about 24 hours old. No effect after 24 hours. Stay tuned.
  4. Whitey4

    Whitey4 LawnSite Silver Member
    Messages: 2,448

    My take on nut sedge.... those nutlets store a chitload of energy! Kill the top growth, the nut will produce more shoots. It's a two year app.... kill the top growth twice this year, 8 to 10 weeks apart... and repeat next year. The nutlet has to be starved. I think that killing the top growth twice each season for 2 years will starve the nut. Eventually, it will run out of stored energy. Then, the nutlet dies, and so does it's top growth. Nutsedge has to be managed in a long term program for at least two years. JMHO.
  5. cod8825

    cod8825 LawnSite Senior Member
    Messages: 501


    When do you think here in the Kansas City area is a good time for spraying nutsedge.
  6. robertsturf

    robertsturf LawnSite Bronze Member
    Messages: 1,406

    Right now throught the end of the season. Just be patient. It takes a while to kill them buggers. It will yellow in 10-14 days. Also be sure and control the watering habits of your customers. I have a customer that was constantly over-watering. This year with all the rain he has barely watering and we have only had to do 1 app so far.
  7. Whitey4

    Whitey4 LawnSite Silver Member
    Messages: 2,448

    While the question was not directed at me... I'll take a shot. Late June in zone 6 to 7 is a good time for the first app. Wait at least two days after it's been mowed.... the more leaf surface, the better. I'd prefer 3 days after mowing. The first app should get the top growth, but the nut will send out more shoots. hit it again 8 to 10 weeks after the first app. Tell the customer that it will almost certainly need a double shot again next year.
  8. robertsturf

    robertsturf LawnSite Bronze Member
    Messages: 1,406

    Like he said.

    PSUTURFGEEK LawnSite Senior Member
    Messages: 579

    Also, take a look at the mode of action in sedgehammer and Dismiss, then if you compare the way they work you will notice diismiss and echelon both go after the nutlet itself and not just the top growth, this should help in time to reduce the issue, I would also say take a look at echelon next year for your'e biggest problem lawns, FMC is backing echelon, if you get breakthrough they are throwing dismiss at you as a post, pretty much a no brainer if your'e already a barricade/stonewall user.
  10. grassman177

    grassman177 LawnSite Fanatic
    Messages: 9,795

    your nutsedge will not die due to the fact that the solution was too old. you must use it within 2hrs or it goes bad. it is in the label of sedgehammer. that is one of the reasons i dont use it daily anymore. sulfentrazone for me

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