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Fungus on Bulbophyllum Orientale

This is a discussion on Fungus on Bulbophyllum Orientale within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I have a Bulbophyllum Orientale that has developed a white fungus (photographs below). Other than ...

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  1. #1
    sammywolffox's Avatar
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    Default Fungus on Bulbophyllum Orientale



    I have a Bulbophyllum Orientale that has developed a white fungus (photographs below). Other than the fungus the plant is healthy. The plant is mounted with well established roots so re-potting is not an option. I have tried treating the fungus with Isopropyl alcohol and a Q-tip with no luck. i have tried soaking the fungus in Physan 20 which killed most of the moss on the mount but not the fungus. One problem seems to be that this bulbo likes frequent, daily, watering and high humidity. The condition (amount of fungus present) is more severe than my photograph indicates. Any help and suggestions will be appreciated---Thanks
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  2. #2
    Desdinova is offline Senior Member
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    Is it actually on the bulbo or is it on the mount, the way it looks? If it's on the mount, and not doing anything to your plant, I wouldn't worry about it. Looks as if your plant is subdividing itself happily and may need a new mount soon anyway.

  3. #3
    sammywolffox's Avatar
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    Thanks- The fungus is not on the bulbo although it is under some of the roots. I have experience re-mounting large root orchids, but this plant has very fine roots that attach tightly to the mount. Do you have any advice on the best way to re-mount fine root orchids. My wife purchased this orchid, for me, at an orchid show because she liked the shape of the mount. Since that time I have acquired several other bulbos--- I am still learning about this genera.

  4. #4
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    I would not remount. I would attach the entire thing to large piece of cork or another type of wood.

  5. #5
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    a little tricky here because bulbo's root are not very forgiving towards certain antifungal, and things like mancozeb usually does not work well on those whitish colony of fungus/mold in the pics. copper sulphate and bleach definitely works for these but unfortunately it is a NO for bulbo (i experimented it several times).

    it you are planning to re mount this bulbo, why not divide into two plants? anyway it is time's up for the two yellow bulbs connecting the two colonies

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    I've read of someone blasting fungus on a mount with full sun to kill it...they made little shields for the plant.
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    Quote Originally Posted by cakedaddy View Post
    I've read of someone blasting fungus on a mount with full sun to kill it...they made little shields for the plant.
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    will it "torch" the bulbo? how long to exposed it to full sun?

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    It was interesting...he made little paper shades for the plant. I'm not sure how they were affixed to the mount. The little paper shades protected the actual plant from the sun but left the fungus exposed.
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  9. #9
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    I will try the paper shade method. Fortunately most of the plant growth is on the opposite side of the mount from the fungus. Should I try to scrape as much fungus as possible prior to exposing the plant to periods of full afternoon sun? The plant has grown well under conditions in which it receives morning sun so it has a degree of sun tolerance. I became concerned because the plant grew exceptionally well for about a year, however, over the past 4-5 months the plant growth has slowed and the overall appearance of the plant is not as good as it was at one time. The conditions under which the plant grows have not changed so my concern focused on the fungus. I am afraid my first attempts to address the problem have resulted in more harm than help! I APPRECIATE THE MEMBERS OF THIS FORUM WHO HAVE TAKEN TIME TO OFFER ADVICE.

  10. #10
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    I wouldn't be worried at all, as this fungus poses no threat to the actual plant, it might even benefit from it.

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