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Imprelis is bad for Spruce and other trees

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

  1. Airborne Toxic

    Airborne Toxic LawnSite Member
    Posts: 14

    Rumor is starting to swirl that Imprelis is killing evergreen's, especially norway spruce. Damage is dramatic and progresses rapidly 4-6 weeks after application. Be very careful where you apply, and READ THE LABEL. Avoid drip lines. Damage is more evident on mature spruce versus newly installed 6-8 footers, probably because of the concentrated drip line of a smaller tree. Use wisely. Its a great product, but may be very short lived...
     
  2. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,843

    I wouldn't put out a panic signal yet.
    According to the DuPont rep I spoke with, Dicamba is actually worse via root uptake than Imprelis is. And I have yet to kill a tree using a product containing Dicamba, even sprayed right up to the trunk.

    More info, please. What application method was used, what rate, etc?
     
  3. Airborne Toxic

    Airborne Toxic LawnSite Member
    Posts: 14

    I agree, and I assure you it's not panic I intend to spread, but the recent issues were suggested by a couple other posts buried in another thread. This is going to deserve attention. That being said, there is no question imprelis is a great product when used properly.

    When is the last time you spoke to your Dupont rep? Touch base with him/her tomorrow and ask about any recent issues with trees, and if there are any specific trees that may be more succesptible than others. There is apparently a good reason why the label recommends avoiding the drip line. Who know, maybe it will all blow over and turn out to be nothing.

    I do apologize, but I can't mention the specifics of the app.
     
  4. Airborne Toxic

    Airborne Toxic LawnSite Member
    Posts: 14

    However, I should have titled the thread with a more cautionary tone. Imprelis COULD be bad for... point taken!!
     
  5. mdlwn1

    mdlwn1 LawnSite Silver Member
    Posts: 2,443

    I'm always surprised to hear when people spray any weed control below something ornamental in value.
     
  6. grassman177

    grassman177 LawnSite Fanatic
    Posts: 9,795

    i have had no ill effects at all anywhere

    sprayed up to blue spruce trees and clematis vines. no issues and it has been at least 4 weeks or more
     
  7. Grassworks Inc.

    Grassworks Inc. LawnSite Member
    Posts: 95

    Saw my first damage yesterday on a lawn that was sprayed 6 weeks ago. White pines and a Norway spruce. The spruce is toast. Have talked to several people over the past couple days and they're seeing more of it.
     
  8. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Posts: 8,843


    Was this your customer? What application method did you use (ride on, gun, etc). What rate?
     
  9. Grassworks Inc.

    Grassworks Inc. LawnSite Member
    Posts: 95

    Yes. Handsprayed @ 90gal/A, 4.5oz/A rate of Imprelis. The site is about 100k sqft. Had enough Imprelis for 65-70k, then switched tanks and sprayed the rest with Vessel. Tank mix consisted of fert/Prodiamine/and herbicide. No twisting/distorted growth on pines in the Vessel-treated areas, only the Imprelis-treated areas.
    Have heard about 2 other LCO's in the area having issues also. I hope DuPont doesn't take the Benlate route with this.
     
  10. jasontimm

    jasontimm LawnSite Senior Member
    from MN
    Posts: 362

    The DuPont rep or any chemical rep. is no diffrent than a used car salesman, they will tell you what you want to hear.
     

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