I applied Pendimethlyn on new sod-should i worry?

Discussion in 'Pesticide & Herbicide Application' started by centraltxturf, Feb 22, 2009.

  1. centraltxturf

    centraltxturf LawnSite Member
    Messages: 36

    Well, I re-read the label this weekend for Barricade. It says specifically NOT to apply to new sod. Well, I missed that before I had done so on two occasions this spring.

    On one lawn, I applied 0-0-7 w/ Pendy on a newly sodded (last fall) Bermuda lawn. I was using my new permagreen, and discovered I went pretty heavy. I'm worried about the repercussions.

    Another lawn I applied Barricade in a liquid form to a brand new zoysia lawn. I applied at the 1lb per acre rate (low rate).

    Can anyone tell me with experience what I should expect? I have a feeling it's not good- I'm wondering how bad it's going to be.

    I try not to be a dumbarse but I'll admit I really feel like one now. Especially if I ruined these people's new turf.
  2. humble1

    humble1 LawnSite Silver Member
    from MA
    Messages: 2,519

    If it was sodded last fall, I would think you would be okay now,
  3. tlg

    tlg LawnSite Senior Member
    Messages: 651

    If the lawns were established you will more than likely be ok. As long as the grass was rooted well. You could get some stunting of growth but I doubt you will have permanent damage if you over applied though.
  4. mngrassguy

    mngrassguy LawnSite Silver Member
    Messages: 2,167

    New sod shouldn't need a pre. So you applied then read the label? Oh, oh. Bet you won't do THAT again. Are you licensed? Sorry, just had to ask.
  5. scweedman

    scweedman LawnSite Senior Member
    Messages: 499

    What makes you think new sod doesn't need pre-emergent.

    VARMIT COMMISSION LawnSite Senior Member
    Messages: 547

    Out where I live houses are built on top of pasture ground. The new dormant sod is almost unseen with winter weeds growing in between the rolls.. In fact some of it is being lifted by weeds. Every new yard out here gets a pre-m. My favorite is Musk thisle stalk's the size of your wrist and my hose unable to bend them over. I have to go around them like they are tree's. They would probably tip my PG over if I hit it.
  7. mngrassguy

    mngrassguy LawnSite Silver Member
    Messages: 2,167

    Experience. Maybe the shorter growing season makes a difference here. I might see some break through in between sod rolls but that's very seldom.
  8. greendoctor

    greendoctor LawnSite Fanatic
    Messages: 10,136

    What kind of pre-m do you prefer around newly laid sod. I get to deal with new sod and weeds 12 months out of the year. I like a simazine/Banvel mix around new grass. No root pruning or growth retardant effects, but broad spectrum control of most weeds. I see another horror here. Purple nutsedge poking through new sod. It sometimes comes up as thick as a lawn. I wait until the sod has grabbed the ground underneath and go at it with Certainty.
  9. quiet

    quiet LawnSite Senior Member
    Messages: 720

    It's not the longer growing season, it's the dormant period that leads to weed invasion here in the south. In our average winter, we don't get any snow, and only occasional freezing temps here in Austin, TX. But rhe turf is dormant from Dec 1 to March 1. Meanwhile temps are on a roller coaster - anywhere from 85 to 20 degrees, with wide daily temp swings of 40 and even 50 degrees. If a lawn was sodded in the fall, it's not gonna grow and compete with weeds until spring. As Varmint Commission noted, those gaps between sod rows have no competition during the winter. Add some rain, and those winter weeds can get to biblical proportions!

    But that being said, I'm still very leery of putting any pre-m - particularly pendi - on new sod. That sure isn't gonna help it get rooted and established. I think the better option in sod 1st year is to treat post-m and let the customer know the downside, but why you're taking the "long term" approach. Once zoysia gets established it fights weeds off real well without a preemergent.
  10. quiet

    quiet LawnSite Senior Member
    Messages: 720

    Interesting! But as you state, you have a 12 month growing season. I don't like using simazine on hybrid bermuda; I just don't like the stunting and the retarding of green-up I've seen.

    As a side note, I do work in an age-restricted community. You should see those retirees water the crap out of new sod, and then the nutsedge just goes absolutely crazy!

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