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hot weather and nutsedge

Discussion in 'Pesticide & Herbicide Application' started by SimonCX, Jul 15, 2011.

  1. SimonCX

    SimonCX LawnSite Senior Member
    Messages: 731

    Anyone else having problems, it's been close to 90 or over for a while now and I have a couple clients where nutsedge is going like crazy. I'm hoping it cools down a bit soon so I can spray it but it seems like this year nutsedge is going out of control almost every client and neighbor has it.

    Messages: 1,343

    Yup just keep educating the customers. Yes its an eysore but manageable under the right conditions and it is annual.
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  3. vencops

    vencops LawnSite Bronze Member
    from NC
    Messages: 1,537

    I haven't (admittedly) read up on this pest as much as I should have. It's hot here, too. I'm spraying yellow nutsedge, currently. But, it's only in a secluded spot that's pretty hearty.

    I know (at least here) it likes moisture. Luckily, the accounts I have it in are experiencing "acceptable" levels.
  4. Young Bros

    Young Bros LawnSite Senior Member
    Messages: 710

    We use Surge in the warmer weather. The sulfentrazone suppresses nutsedge. We spray crabgrass with Solitare, so we hit the nutsedge again with that. It has a high % of sulfentrazone so the double hit shuts it down good. We used to use Sedgehammer, but it is more of a pain to have another backpack with that in it too, since we need one for Solitare, one for Round up, & one for Perimeter Insect Protection.
  5. SimonCX

    SimonCX LawnSite Senior Member
    Messages: 731

    I was going to pick up surge the next time I was at lesco because it's states that it can be used to 90, I've been using q4 or momentum fx2 with good results but when the temps reach 80 sometimes it burns the grass and 85 I won't spray it. I keep telling customers why I can't spray and sometimes I think the nutsedge bothers me more then my customers. I hope the temps go down alittle in the next 2 weeks.
  6. qualitylawnpro

    qualitylawnpro LawnSite Senior Member
    Messages: 547

    does the temperature need to be under a certain temp to use sedgehammer?
  7. Young Bros

    Young Bros LawnSite Senior Member
    Messages: 710

    I would not want to even walk on a lawn >90 degrees, let alone put water or chemicals on it above that temp.
  8. fireman gus

    fireman gus LawnSite Senior Member
    Messages: 517

    We use Sedgehammer. For us it has done wonders. Temperature has never been a proble--hot or mild. We only spot spray nutsedge.
  9. Az Gardener

    Az Gardener LawnSite Gold Member
    Messages: 3,899

    It is probably our biggest turf weed here in AZ. here is what I have learned. Prior to the summer solstice, around the 4th of July, the plant the is using stored starches in the nut to put out new growth. It is not taking in or storing starches so the more expensive true kill products like certantee or sedge-hammer do not work. After the solstice begins the plant begins storing up for next year so thats when these products work best as the chemicals are taken into the roots and nut so the chem's can do their thing.

    So prior to solstice any product that knocks it down is a good thing. Our local research says a combo of Image and MSMA works best.

    The temperature issue I believe is because of use on cool season grasses like Rye and Fescue. It will probably burn those varieties at the higher temperature's. Although I have noticed we have better success when we spray first thing in the morning when its below 100
  10. ted putnam

    ted putnam LawnSite Platinum Member
    Messages: 4,718

    This is good to know. We switched from Sedgehammer to Certainty this year due to poor results with the former. I think the poor results were because that is what we have been using the last few years and it was time for a change.The nutgrass seemed to be drinking it like Kool-Aid. We've been using Certainty since the nutgrass first emerged back in the spring. We've had very good results up to this point. According to your info, results should be outstanding from here on out...

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