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Chlorosis (leaf yellowing) on mounted Brassavola nodosa

Discussion in 'Issues, Disease and Pests' started by Dave The Scientist, Aug 27, 2016.

  1. Dave The Scientist

    Dave The Scientist Active Member

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    Does any one know what causes this? I'm at a loss. It's being grown mounted in a empty clear plastic pot outside in full sun . It gets daily water and regular fertilizer and monthly Epsom salt. [​IMG]
     
  2. Ray

    Ray Orchid Iconoclast Supporting Member

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    Sorry Dave, but that doesn't look like chlorosis to me. It's not throughout the entire growth, and not at the base, and the paler part in the middle is somewhat collapsed, so that make me think "infection," possibly brought in by an insect bite.

    You might consider a systemic copper treatment, which will act as a bactericide and fungicide.
     
  3. Dave The Scientist

    Dave The Scientist Active Member

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    Thanks Ray. It doesn't appear to be spreading and it's just on two leaves so I was considering just removing the affected leaves. Would that probably stop it
     
  4. Ray

    Ray Orchid Iconoclast Supporting Member

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    Maybe.... Immediately after cutting off the growths, observe the cut for discoloration. If none, just dust the wound with cinnamon. If there is some, you may have to take bolder actions.
     
  5. Dave The Scientist

    Dave The Scientist Active Member

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    Ok. I actually asked a experienced grower from my society and he noted it was only on the very oldest two leaves and thought it was just done with those leaves and getting ready to drop them. But I'll be on the lookout for any spreading. I water the plant every day so I can keep a close eye on it.
     
  6. Dave The Scientist

    Dave The Scientist Active Member

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    I ended up just pulling the effected leaves off. Plant seem to be doing fine. No other leaves affected and it's putting out several new growths and roots.
     
  7. Dave The Scientist

    Dave The Scientist Active Member

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    I have been keeping it a bit drier, which it doesn't seem to mind especially as it's getting much cooler
     
  8. Josh H

    Josh H Member

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    Something similar occurred recently on a few older leaves on my Leptotes bicolor. It didn't spread and the plant's new growths look healthy. I'm hoping it's just old leaves getting ready to fall.
     
  9. Dave The Scientist

    Dave The Scientist Active Member

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    That's what it ended up being for me. My plant is fine nos