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Rose Black Spot disease

Rose Black Spot disease

Question from Eileen Robinson
1258 1
My Winter Sun was planted last autumn and looked great throughout winter and flowered even with all the snow and rain in Edinburgh. However, I have just discovered it is diseased and it looks like Rose Black Spot according to my research. Is this possible and is it curable if I act quickly? Can it spread to my spring bulbs, ivy and holly bushes planted nearby?
Posted: Saturday 17th of April 2010 05:40 PM

  • Mahonia rust?

    Shoot User
    Hi Eileen,

    It's difficult to know anything for sure without seeing the problem - would it be possible for you to upload some pictures for us to have a look at? I'd be inclined to think it may be mahonia rust, as this is the most common disease faced by mahonias. The quickest way to identify this is to check the underside of the leaf, which will have brown pustules on it if this is indeed the case.

    In the meantime remove all infected parts of the plant and burn them, and you might want to thin out the area to improve ventilation if this seems as though it could be a factor.

    I look forward to seeing some photos, and hopefully we can get to the bottom of your problem!

    Many thanks
    Katy
    Replied: Tuesday 20th of April 2010 11:00 AM

    • Black Spot

      Eileen Robinson
      Thanks Katy.

      I had already removed the leaves and disposed of them by the time I saw your reply. It was definitely Black Spot. I used a fungal pesticide after removing much of the leaves. It looks ok and will keep monitoring it. Hopefully it will recover to its former glory!

      Regards
      Eileen
      Replied: Tuesday 27th of April 2010 08:21 PM
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