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Angcm Veitchii--main growth die back???

Discussion in 'Issues, Disease and Pests' started by Reyna, Jun 15, 2012.

  1. Reyna

    Reyna Orchid Obsessed Supporting Member

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    So, over the years I've had a couple of mature plants that start dropping leaves like mad from the original/mother growth. The basal keikis continue to grow and don't have the problem. In fact, if/when the mother plant has died back, the keikis just continue on and eventually you have a bush. :)

    Case in point, here is an Angcm Veitchii. The plant has two large keikis--both have bloomed. The mother plant looked fine 3 weeks ago, but since then has lost nearly a dozen leaves.


    This plant is sitting with a bunch of other big angraecums, and they are all just fine. I should probably know the answer to this -- but is it normal for the mother plant to die back. (And quickly?) Or is this some disease that I should wipe out immediately? Thoughts?
    veitchii.jpg Veitchii 2.jpg
     
  2. Uluwehi

    Uluwehi angraecoids, dendrobiums and more Supporting Member

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    Oh no :( I feel for you.

    Some thoughts:
    - I've never grown this hybrid before so I don't know if it is prone to abandoning older growths. Not all orchids are born to live for decades, so this could be natural. Some hybrids have weird behaviours
    - I would be alarmed and would check the roots to see if there is die-back indicating a bigger problem
    - I would watch closely how this progresses, because if the growth is infected with a pathogen, I would want to remove it before it spreads to the rest of the plant by cutting the with a freshly-sterilised blade stem until I've found a section whose tissue is totally green and free of visible browning.
    - it may be good to apply a preventative drench/spray with a systemic fungicide, just in case
     
  3. Reyna

    Reyna Orchid Obsessed Supporting Member

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    Hi Jacob. My thoughts exactly. I'm already trying all the usual preventative measures. I have done the Physan, probably going to do the Phyton. The plants roots are looking good, so it isn't a problem from that standpoint. Just wondered if anyone else had seen this. I'll keep you posted.
     
  4. Brian Brown

    Brian Brown Member

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    This looks like overwatering to me. My Ang. sesqui started doing this until I cut back on the H2O. They can take fairly dry conditions (although with high humidity) in my experience.

    Brian
     
  5. Reyna

    Reyna Orchid Obsessed Supporting Member

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    Yea, I watch the water too. :) Especially when they are big plants in big pots. They stay wet much longer than you'd think.
     
  6. Uluwehi

    Uluwehi angraecoids, dendrobiums and more Supporting Member

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    You are an amazing grower of angraecoids, still I suppose it's true that even the best growers aren't immune from surprise problems like this. I hope the issue gets resolved soon. It would be sad to lose such a well-loved, mature specimen.
     
  7. Reyna

    Reyna Orchid Obsessed Supporting Member

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    Could be Brian -- I'll try keeping it extra dry. I did just re-org the greenhouse and it is a bit closer to one of the hydrofoggers. I'm generally pretty careful, but you never know. It is a good suggestion and I appreciate it.

    Thanks Jacob. That is a compliment coming from you. :) So far after treating the plant with the Physan a day or so before I posted and Phyton a couple of days ago, the plant hasn't lost any more leaves. One of the things I like most about orchids -- and which simultaneously frustrates me to no end -- is that no matter how much you learn or how long you grow, there is always something you haven't figured out yet. :D