can anyone identify these bumps on tree leaves?

Discussion in 'Outdoor Gardening in the Pacific Northwest' started by cagreene, Jun 10, 2013.

  1. cagreene

    cagreene Active Member

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    my neighbour and i just noticed these ugly bumps all over the leaves of her alder tree i think she said, don't quote me, they are green on the top side and a rusty yellow/brown on the bottom....what are they, and how do we get rid of them? thank you! i tell her you people are just amazing....trying to get her to join as she loves gardening....thanks again!
     

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  2. Ron B

    Ron B Paragon of Plants 10 Years

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    Appear to be Populus leaves, look up problems of those trees.
     
  3. cagreene

    cagreene Active Member

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    unfortunately we checked the online info about poplar trees and found not a single one that matches...these bumps are on a good 60% of all the leaves but the tree looks healthy otherwise. there is no noticeable bug activity on tree or under it.
     
  4. Ron B

    Ron B Paragon of Plants 10 Years

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  5. togata57

    togata57 Generous Contributor 10 Years

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    Edema, maybe?
     
  6. cagreene

    cagreene Active Member

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    thanks again. definitely leaf blister. we had looked together through 3 pages of google 'suggested sights' for our question...nothing matched. i told my girlfriend its time to find a better search engine!
     

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