Correct diagnosis

Discussion in 'Landscape Architecture and Design' started by ipm, Mar 8, 2003.

  1. ipm

    ipm LawnSite Senior Member
    Posts: 264

    Does anyone know how to diagnose Pine trees for 'Pine Beetles'. I have a few pine trees that have lime green needles and was wondering what it might be. Thanks in advance.
     
  2. See if this site helps. We have a lot of pine beetle here, I have see damaged trees but never active beetles.
    Btw- no help to you but I like turning beetle killed pine on the lathe, it has beautiful streaking patterns.
    http://www.ext.colostate.edu/ptlk/1424.html

    Are the lime needles just at the tips? could it be the new growth?
     
  3. ipm

    ipm LawnSite Senior Member
    Posts: 264

    Very interesting, I imagine it would be a sight.

    The lime green needles are not consistent, so I ruled that out. I did a little research and cannot find any of the symptoms of pine beetles in these trees. I will keep a close eye on them.
     
  4. philk17088

    philk17088 LawnSite Fanatic
    Posts: 17,386

    IPM,

    I've noticed maybe the same thing on white pine. Especially in rows or mass plantings. I took a sample to the extension, the found no evidence of any insects or disease. They thought it was probably due to drought stress from the past 3 years showing up in the trees with the least amount of vigor in the plantings. Only recommendation they gave was to fert with a low N, high P & K fertilizer.
    Hope this was useful.
     

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