Imprelis is bad for Spruce and other trees

Discussion in 'Pesticide & Herbicide Application' started by Airborne Toxic, Jun 1, 2011.

  1. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,867

    Still, not buying all this hoopla yet.
    If there are applicator error issues then those need to come out.

    No way applying 1/4 gal/K low volume with a ride on is going to kill mature pines through root uptake. With a handgun and all that volume, who knows...
     
  2. mdlwn1

    mdlwn1 LawnSite Silver Member
    Posts: 2,443

    The volume means nothing...it's the ai per k.
     
  3. grassman177

    grassman177 LawnSite Fanatic
    Posts: 9,795

    that is true, it is about ai
     
  4. Grassworks Inc.

    Grassworks Inc. LawnSite Member
    Posts: 95

    There is an Imprelis treated site close to here with 450 dying Norway Spruces. No way that is applicator error. Thankfully not one of my sites.
     
  5. Grassworks Inc.

    Grassworks Inc. LawnSite Member
    Posts: 95

    Once it rains, what difference does volume make?
     
  6. garydale

    garydale LawnSite Senior Member
    Posts: 813

    Lawn treated 04/25/2011
    Experieced licensed operator with 15 years on job.
    Pathfinder machine.
    No wind however we had 5 inches of rain over two week period after treatment.
    We have treated cover 500 lawns. so we are on the lookout for more damage.
    Nothing found yet and no phone calls.

    WEEPING NORWAY SPRUCE.jpg

    WEEPING NORWAY SPRUCE (2).jpg

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    WEEPING NORWAY SPRUCE (6).jpg
     
  7. djagusch

    djagusch LawnSite Platinum Member
    from MN
    Posts: 4,202

    That's ugly.
    Posted via Mobile Device
     
  8. propositionjoe

    propositionjoe LawnSite Member
    Posts: 14

    You're absolutely right -- all these comments about spray volume totally miss the point. Imprelis is a soil herbicide, closely related to products like picloram. It's active in the soil at very low rates, and there are warnings very clearly laid out on the label about its propensity to move into groundwater, and the need to avoid spraying inside the drip line of trees. My guess: the heavy rain after application moved the Imprelis into the root system before it had metabolized in the soil, so the trees essentially got a big dose of product right to their roots.

    This is why, in a nutshell, residual broadleaf herbicides have been so few and far between in T&O -- just too much risk of something like this happening.
     
  9. Grassworks Inc.

    Grassworks Inc. LawnSite Member
    Posts: 95

    I'm looking on the label on the jug of Imprelis I bought earlier this spring. Nowhere does it say to avoid spraying under the dripline of trees or shrubs. It does say "particular care must be taken within the dripline of trees and shrubs" and "do not apply to exposed roots of trees and shrubs".
    My guess is DuPont will come out with a revised label very soon if they haven't already. I do know they are very aware of what's going on.
     
  10. White Gardens

    White Gardens LawnSite Fanatic
    Posts: 6,776

    Yes, yes they are.

    I'm anxious to see a press release about the issue.
     

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