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Need help/advice on Catasetum

This is a discussion on Need help/advice on Catasetum within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I've had this plant for a number of years and this year I have 3 ...

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  1. #1
    Shannara's Avatar
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    Question Need help/advice on Catasetum

    I've had this plant for a number of years and this year I have 3 new growths. I was very happy until I noticed one of the old bulbs turned mushy and rotted off. I thought maybe it was just old but now the one next to it is also getting soft. I am unsure if this is a problem or not as this is my only Catasetum. I do not know if I should remove the bulb the new growths are on and repot or what.

    Here are some pics of the plant.

    Ctsm. atratum 'Polar Cap' x Ctsm. Pileatum 'Orchidglade':

    1) Location where old cane turned mushy and rotted off.
    2) Current cane turning mushy
    3) New growths



    Close-up of new growths:



    Shann~

  2. #2
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    For one, i think it needs repotting. I'd do it now while it was actively growing. I have a couple of these plants, and it seems when they get to have 4 or 5 p-bulbs one of them gets crinkled and rots.

    I'd repot it to the depth of the newest growth so all of the new roots are under the media and just to be safe I'd treat it with Physan.

  3. #3
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    ..oh...

    It doesn't look like it's getting enough water and starting to dry out the old growths so the newer ones stay hydrated.

    It is almost IMPOSSIBLE to over water these plants when they are actively growing.

  4. #4
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    Hi, Shann. I would repot and let them grow happy. I am not an expert, but I have one blooming now that has the same bulb like yours and I am only waiting it to finish blooming.

  5. #5
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    Maybe not enough air movement? Sometimes stagnant air causes rot. Unless you have a fan or something actively moving the air around, this can cause problems.

  6. #6
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    Hey Clint thank you! I will repot this evening. I have mostly orchid bark mix, seedling mix, and some coco fiber available. Does this orchid have a potting medium preference?

    just to be safe I'd treat it with Physan
    I don't have any physan though...


    have one blooming now that has the same bulb like yours
    Margo does yours have a scent? I remember this one being quite fragrant.


    Maybe not enough air movement?
    It's outside most of the year in bright shade on the South porch part of my house. I don't think air movement is an issue but appreciate the thought. I try and put one my fans out there now and then to help the airflow for some that are on the ground. This one is midlevel near the railing.

    Shann~

  7. #7
    clintdawley's Avatar
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    I have mine in Spag and they really like it. I can post a picture when I get home if you'd like. If you don't have any Physan, any anti-fungal will do.


    Quote Originally Posted by Shannara View Post
    Hey Clint thank you! I will repot this evening. I have mostly orchid bark mix, seedling mix, and some coco fiber available. Does this orchid have a potting medium preference?


    I don't have any physan though...



    Margo does yours have a scent? I remember this one being quite fragrant.



    It's outside most of the year in bright shade on the South porch part of my house. I don't think air movement is an issue but appreciate the thought. I try and put one my fans out there now and then to help the airflow for some that are on the ground. This one is midlevel near the railing.

    Shann~

  8. #8
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    I have mine in Spag and they really like it.
    Since I don't use sphag in my collection would a clay container using orchid bark mix on the bottom and seedling mix near the top work? I could also try that coir brick soil...it looks like an interesting medium.


    I can post a picture when I get home if you'd like.
    I always like orchid pics!


    If you don't have any Physan, any anti-fungal will do.
    I found a 3in1 plant spray thats active ingredients are 20% sulfer and .01% pyrethrin. Would that be okay or should it only be an antifungal?

    Shann~

  9. #9
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    Coir brick would probably be the best, but I've never used it. You need a media that holds a lot of water. Then, when they go dormant you don't have to worry..just let it go all the way dry until new growth starts. I'll post some pics when I get home.

    Quote Originally Posted by Shannara View Post
    Since I don't use sphag in my collection would a clay container using orchid bark mix on the bottom and seedling mix near the top work? I could also try that coir brick soil...it looks like an interesting medium.



    I always like orchid pics!



    I found a 3in1 plant spray thats active ingredients are 20% sulfer and .01% pyrethrin. Would that be okay or should it only be an antifungal?

    Shann~

  10. #10
    clintdawley's Avatar
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    Quote Originally Posted by shannara
    I found a 3in1 plant spray thats active ingredients are 20% sulfer and .01% pyrethrin. Would that be okay or should it only be an antifungal?

    Shann~

    Pyrethrins are for insects, right? That seems like an aweful lot of sulfur to be dumping on the plant...I wonder what the others think??

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