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Orchids tested for viruses - negative

This is a discussion on Orchids tested for viruses - negative within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; The black spots look like septoria (fungal infection). I could be wrong...

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  1. #11
    ksriramkumar is offline Senior Member
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    The black spots look like septoria (fungal infection). I could be wrong

  2. #12
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    catttan is offline Senior Member
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    I occur with Harvey that this is a cosmetic issue. Most Oncidinae when exposed to high light levels will exhibit these spots.

  3. #13
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    Catt Mandu is offline Senior Member
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    I agree with zainal abidin's interpretation - fungal. It is possible to treat with a fungicide and clear it up.
    I am not sure what fungicides are available in your area, but you might want to check this table & see what you can find locally:
    http://www.staugorchidsociety.org/PD...idDiseases.pdf (See columns to the right pertaining to leaf & flower fungi)

    If neem is available, I find that it is effective on some fungal problems.

    Note that Physan is effective on relatively few fungal problems, though it does work on Botrytis.

  4. #14
    Puppies2 is offline Member
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    I have several oncidiums. Air movement for them is crucial to avoid fungal infections. I have 2 oscillating fans in my home running 24/7 on high.
    Happy growing

  5. #15
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    Carolla is offline Senior Member
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    Ok, more fanage here!! I have the fan, just didn't know to use it. Even with AC it will feel good to me here, its starting to warm up outside.

  6. #16
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    78Terp is offline An Avant Gardner
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    I even have a fan on my outdoor orchids!

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