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Black dots on oncidium

Discussion in 'Issues, Disease and Pests' started by ValeST, Mar 23, 2014.

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  1. ValeST

    ValeST New Member

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    Hi every one! I hope you can help me with an issue. Ultimately, I have seen some little black dots under the leaf of my sharry baby orchid. I noticed this because these leaves are more yellow than the others. First, I saw the yellow leaf and I thought was because they need more light, and I moved it to a brighter place. It works at first, but now they have in addition these black dots. Any idea what could be? Or what should I do?
    Thanks so much for you help!

    Val ImageUploadedByOrchidsForum.com1395611253.813289.jpg ImageUploadedByOrchidsForum.com1395611265.911336.jpg ImageUploadedByOrchidsForum.com1395611276.144511.jpg
     
  2. Marni

    Marni Well-Known Member Staff Member Supporting Member

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    Yellowing leaves can be a normal process of aging in an orchid. Usually it will happen to the oldest leaves. It can also come from too much light as well as insect damage or bacteria. In this case I would suspect you might have a virus. Judging from the mosaic type patterning on the yellow leaf in the second picture I'd say it's a distinct possibility. Sometimes associated with virus there will be black small streaks, but here you seem to have more specks. I would suggest keeping this isolated from your other plants and getting the plant tested. There are home test kits that you can buy online or you can send a sample of the leaf to accompany such as Critter Creek who offer this service. Be sure that whenever you're cutting any part of any plant you are using a sterile tool — either a sterilized blade or a new razor blade. Others may have different ideas so hopefully there will be more input.
     
  3. Kermie

    Kermie Tadpole Supporting Member

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    Sharry Baby is notorious for having black dots on it. I've heard mixed reasons about why, never anything truly persuading. I have a very healthy clone that has black dots. The yellowing is suspicious, and I would test the plant at the very least. Sharry Baby is also known to be over cloned and sometimes virused too.
     
  4. ValeST

    ValeST New Member

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    Thanks so much for you answers!
    I'm really concerned about viruses, I'm already cut some leaves because I suspected of that issue before. I think I'm hoping something else.
    If were a virus, should I just throw the entire orchid to the trash can?
     
  5. ValeST

    ValeST New Member

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    Hi again, I just came with something new! I was cleaning the oncidium, deciding what can I do.... And just touching the plant, this came up!
    Do you now what could be? Over watering? Bacterial, fungi or virus infection? It's the only one, and was the same who had the black spots. ImageUploadedByOrchidsForum.com1396027012.730883.jpg

    Can you help me?
     
  6. Sean Houtman

    Sean Houtman Active Member

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    This is going to be a bacteria, remove anything that is mushy and brown, sprinkle the cuts with cinnamon.
     
  7. ValeST

    ValeST New Member

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    Thanks! I'm having some new growts
     
  8. ValeST

    ValeST New Member

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    Thanks! I'm having new grows as well, so this is not too bad. I'll follow your advice. ;)