How to handle potential Imprelis damage

Discussion in 'Pesticide & Herbicide Application' started by DA Quality Lawn & YS, Jul 20, 2011.

  1. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,296

    Guys, maybe some of you can relate....

    Of the lawns I used Imprelis on this spring, I have only seen one lawn that has potential damage. Thats the good news. This lawn contains around a half dozen white pines, and only one tree of the bunch is showing potential damage. I sprayed this lawn with a PG about 9 weeks ago, at the 4.5 oz/ac rate. Started noticing some leader curling at the very top of the tree a couple weeks ago (25 ft tree). Took a look today again, and the top leaders are still curled and there is a little brown at the very top. The rest of the tree is not showing damage - in other words you have to look straight up to find damage but it is there. Looks nothing like some of the pics some of these guys have put up so far on LS, those are bad. Its really curious why just this one tree is showing poss. damage, and the rest of the white pines are not. Putting a % on it, I would say 70% chance this is from Imprelis though I cannot be certain I have seen a lot of diseased pines too.

    My question is this, do I notify the customer right now? My gut says not yet. If I call my customer, then he freaks out, worries about losing the tree, and probably wants me to replace. I am still pretty certain he hasn't even noticed the damage yet (or isn't concerned). I don't see enough damage in this tree yet to say that it is going to keel over (compared to other pics guys have posted).

    Tough question, so no better place than LS to ask.....
  2. jasontimm

    jasontimm LawnSite Senior Member
    from MN
    Messages: 362

    I'd wait DA, like you said there is a chance that it might not be related, especially with all the odd weather we have had this past month. Keep an eye on it, and hopefuly it will work out of it.
  3. americanlawn

    americanlawn LawnSite Fanatic
    from midwest
    Messages: 5,956

    Ditto with jasontimm. I would think the tree will recover, and I would expect new growth (candles) to appear next spring. You may not even need to prune out the dead parts. ISU recommends planting only one type of pine anymore....the eastern white pine (like you described). IMO it is Imprellis damage, and you lucked out. I personally would not recommend using Imprellis anymore until Dupont works out the "bugs".

    The two most common problems here with white pines are:

    1) Planting them too deep
    2) Iron chlorosis due too clay (high pH) soils

    But you're talking about a well established 25 foot tree. So you should be okay. Hope your customer understands. Also hope he doesn't expect you to go up top with a ""cherry picker" just to prune out the brown tissue at the top --- Mother Nature will probably take care of that. my 2 cents :waving:
  4. Service 1st Lawn Care

    Service 1st Lawn Care LawnSite Senior Member
    Messages: 643

    I would wait and see the outcome, between the fall and next spring. With this hot weather make sure your customer is taking the proper care to get the tree through this hot spell. I think his will be OK.

    Hope this heat breaks soon were shut down the rest of the week:cry:
  5. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,296

    Would do, but cannot risk tipping him off right now and having him freak out.
    The tree will just have to fend for itself, and hope we get some nice rainfall over the next few months. If it really takes a nose dive, at that point I will reassess I guess.

    By the way done using Imprelis - dealer took it out of stock. Too bad too, for the wide open areas with tough to kills.
  6. jbturf

    jbturf LawnSite Bronze Member
    Messages: 1,503

    something interesting i saw this week, property blanket sprayed with imprellis
    in may--
    a row of white pines at a customers property, turf abuts the pines,
    pines in mulch bed, anyways im checking out the sprinklers
    there is one brown spot in the turf, turns out the heads were not
    hitting the spot at all-- and its right on the edge of the lawn by the pines,
    there is imprellis damage on only one of 10-12 pines in the row,
    and its the pine directly next to the brown spot in the turf
  7. Think Green

    Think Green LawnSite Silver Member
    Messages: 2,746

    Doesn't the Imprelis label directly state damage will occur to white pines?
    If this label states it.......then i wouldn't touch the stuff.
    My customer's lawns here in the South are covered with them if not arborvitae's.
    It has been my observation that these trees are shallow rooted and will be subject to herbicide, fertilizer burn when applied to traveling water.

    These white there any type of while sap oozing from the base of any of the trees? Are any of the outer needles starting to cast? Any other signs of obvious damage from Diplodia twig blight, phomopsis blight, pine spittle bugs, pine tip borers.??
  8. pieperlc

    pieperlc LawnSite Senior Member
    from Midwest
    Messages: 545

  9. DA Quality Lawn & YS

    DA Quality Lawn & YS LawnSite Fanatic
    Messages: 9,296

    I have not checked the tree for these things. Again, I really do not want to drive up and just inspect that one tree. Homeowner will likely see me, start looking at the tree themselves, and here comes the phone call. I have nothing to hide...but right now the damage is not severe enough to call attention to it purposely.
  10. Think Green

    Think Green LawnSite Silver Member
    Messages: 2,746

    I have done some reading into this imprelis can google the same as me.
    Their is proof that this product is highly a problem on white pines and arbors.
    This product is highly mobile in wet areas. The label also advises for the applicator to give written notice to the manager's, homeowner's,etc. when using this product. This product is too much similar to Confront. You cannot discard of the grass clippings into landfills. This tells me that this stuff is way to iffy to use on the residential level. I am convinced that on irrigated lawns and with the onset of rain in the northern areas, this product is not suitable and should be banned.

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