Imprelis is bad for Spruce and other trees

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

  1. Greenery

    Greenery LawnSite Senior Member
    Messages: 512

    Would you mind pointing out all these HUGE applicator errors that are causing the damage. I guess just looking at a pic on the internet they aren't obvious to me.
    How long have you been doing this and how much pesticide damage have you seen in your time in the industry?

    Posted via Mobile Device
    Last edited: Jun 11, 2011
  2. mdlwn1

    mdlwn1 LawnSite Silver Member
    Messages: 2,443

    I've been doing this for a Look at the pics. Improper app. 1st of don't blanket spray weed control under pines and spruces (as well as many others)..Each one of those pics shows exactly spot spray where needed. Improper product selection... Secondly...I don't see any new seed growing where it was sprayed, so why was imprellis be used to begin with? don't ever spray anything on or under anything that is under stress..especially when planted above grade with a mulch volcano.

    RABBITMAN11 LawnSite Bronze Member
    Messages: 1,473

    How do you know it was blanket sprayed under the trees?
  4. jasontimm

    jasontimm LawnSite Senior Member
    from MN
    Messages: 362

    Because he has a relative that works for Dupont.

    And we sure do have a lot of pros on this site, being able to look at a couple of pictures and being able to declare that it was applicator error :hammerhead:
  5. djagusch

    djagusch LawnSite Platinum Member
    from MN
    Messages: 4,350

    And found a way to get it discounted greartly.
    Posted via Mobile Device
  6. mikesturf

    mikesturf LawnSite Senior Member
    Messages: 797

    These are quotes from the Imprelis label:

    "This product is classified as having high potential for reaching surface water via runoff for several months after application."
    "Runoff of this product will be reduced by avoiding applications
    when rainfall is forecasted to occur within 48 hours."

    I looks like if you applied Imprelis and it rained 48 hours after applying, and stayed away from the trees, you could still get damage.
  7. grassman177

    grassman177 LawnSite Fanatic
    Messages: 9,795

    true, there are no reports of it and i have plenty of them next to white pines that are doing fine while the whites are hurting. looks like blight finally cought up with those austrians, or nematodes
  8. grassman177

    grassman177 LawnSite Fanatic
    Messages: 9,795

    Really!! pretty lame ideas there. we spray under pines all the time and have no labels telling us not to. never an issue. in fact, i have never had any issue with any herbicide unless drift got on say a flower or something like that. never a tree, yet alone like this damage. water amounts and soil have everthing to do with the amount of damage being seen.

    oh, and it is not designed JUST for seeding, it has been marketed on this site even as the cure all weed control for all areas and ocasions. the label says nothing to the contrary either, i have read it about 10 times.
  9. RodneyK

    RodneyK LawnSite Senior Member
    Messages: 774

    Subject: Imprelis - Ohio State

    fyi,'s Buckeye Yard & Garden Line



    A. NORWAY SPRUCE AND WHITE PINE PROBLEMS. Numerous calls came in to Extension offices throughout Ohio in the past week from landscapes, commercial plantings, and golf courses concerning issues with Norway spruces as well as white pines. The symptoms on Norway spruce include significant needle twisting and browning, terminal curling and drooping on new growth, and in some cases needle browning and twisting on older growth. These symptoms are different from earlier Norway spruce symptoms this spring (total or sectional dieback) presumed to be associated with weather conditions over a number of months.

    There are a number of unanswered questions relative to this new damage as to: why there is such variability of injury, the potential for the plants to recover, the range of host plants that are affected, whether or not environmental conditions this spring or last fall contributed to the problem, etc. From what OSUE BYGLers have seen, a common denominator of this particular damage on these samples appears to be an association with turfgrass applications of the herbicide Imprelis.

    This post-emergent, low-volume broadleaf herbicide from DuPont is a highly effective product that is being used by applicators for the first time in the field this year. It is a new subclass of pyrimidine carboxylic acid herbicide, named aminocyclopyrachlor. From the samples sent to Extension offices and labs and subsequent field visits to look at symptoms, this looks to be a significant problem with, as noted, many unanswered questions. Research and trials on the use of this chemical for turf care has been extensive, but widespread field use and experience is in early stages.

    Damage noted this past week during field visits and from reports of damage from e-mails, phone calls, and images indicate variable damage of affected plants in group plantings. At one site, there was significant browning and distortion on over 10% of the Norway spruces planted on a large mound. Some effects were obvious on over half of these spruces, and on some spruces, over 50% of the foliage had browned as of the time of observation. BYGL writers will update readers and others as more is learned. In addition, OSUE staff will monitor certain sites to get a handle on plant recovery, make new site visits to the extent needed and possible, update a list of hosts where problems have been noted, and will forward additional information from other sources as obtained.

    Please note that the Ohio State University C. Wayne Ellett Plant and Pest Diagnostic Clinic (CWEPPDC) can evaluate samples for evidence of disease and insect damage, but do not do chemical residue testing.
  10. pieperlc

    pieperlc LawnSite Senior Member
    from Midwest
    Messages: 545

    In what kind if soils are you guys seeing this damage? I've seen several pictures of the trees being planted on hills. Any Flatland damage?

    Posted via Mobile Device
    Last edited: Jun 12, 2011

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