Disease or frost?

Discussion in 'Ornamental Cherries' started by LilSprout, Jul 7, 2011.

  1. LilSprout

    LilSprout Active Member

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    Has anyone come across ornamental cherries in the North Vancouver area where a portion of the leaves look dead and they are accompanied by new growth?
    Is this a disease (systemic) or could they have been damaged from frost shortly after they came into leaf?
    Thank you for your input
    !
     
    Last edited by a moderator: Jul 7, 2011
  2. Ron B

    Ron B Paragon of Plants 10 Years

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    At this time of the year you may be looking at brown rot of stone fruits.
     
  3. wcutler

    wcutler Esteemed Contributor Forums Moderator VCBF Cherry Scout 10 Years

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    What's the significance of that in terms of the future health of the tree? Does it just affect this year's leaves?

    Almost all the ornamental cherries I've seen in Vancouver have maybe 5-10% dead leaves. They had a hard time this spring with the cold wet weather.
     
  4. LilSprout

    LilSprout Active Member

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    Please explain brown rot - is it systemic?
     
  5. Ron B

    Ron B Paragon of Plants 10 Years

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    I suggest Googling brown rot of stone fruits.
     
  6. wcutler

    wcutler Esteemed Contributor Forums Moderator VCBF Cherry Scout 10 Years

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    I'm adding some photos to demonstrate the brown rot that's affecting so many of our trees. Here's a Kanzan on Comox at Bidwell.
    20110728_ComoxBidwell_Kanzan_Cutler_P1150878.jpg 20110728_ComoxBidwell_Kanzan_Cutler_P1150879.jpg 20110728_ComoxBidwell_Kanzan_Cutler_P1150880.jpg

    One of the symptoms, aside from the brown leaves, is that the dead blossoms may stick to spurs and twigs, which is definitely noticeable on this 'Shirofugen' on Cardero at Comox.
    20110728_CarderoComoxShirofugen_Cutler_P1150886.jpg 20110728_CarderoComoxShirofugen_Cutler_P1150887.jpg

    A lot of what's written about brown rot concerns fruit trees, talking about the effects on this year's fruit. This ehow page and other websites suggest either spraying with a fungicide or pruning off the affected areas of the tree. Since it's not like either will be done for our 11,000 'Kanzan' and many thousand other street trees, are next year's blossoms likely to be affected?
     
  7. Michael F

    Michael F Paragon of Plants Forums Moderator 10 Years

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    Had a lot of something very similar (if not the same) here a few years ago after a particularly cold, wet spring. The trees were all OK again the next year, so I'd not worry.
     

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