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  • 1 Post By MCSchrum
  • 2 Post By cucubirds
  • 2 Post By MCSchrum

Dendrobium (Dockrillia) rigidum losing pseudobulbs

This is a discussion on Dendrobium (Dockrillia) rigidum losing pseudobulbs within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I have a Dendrobium rigidum that is losing pseudobulbs. I bought this mounted plant at ...

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  1. #1
    MCSchrum is offline Member
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    Default Dendrobium (Dockrillia) rigidum losing pseudobulbs

    I have a Dendrobium rigidum that is losing pseudobulbs. I bought this mounted plant at the end of last summer. It had about 25 pseudobulbs at that time. Over the past few months, it has lost about 10 pseudobulbs. They start off turning yellow at the bottom near the stem, and slowly the entire pseudobulb turns yellow, wrinkles, and then falls off. It loses one to two pseudobulbs at a time. I mist this plant everyday, and give it a good soak two to three times a week. So I'm sure it's getting adequate water. The humidity is around 50% in my growing area, and the temperature doesn't get below 55F in the winter. Anyone have suggestions as to what could be causing this?

  2. #2
    cucubirds is offline Senior Member
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    I think u have fungal problem.

    Check any more soft pseudobulbs or not first. Then divide soft one & good one using sterilize knife. If not, the disease will spread & all pesudobulbs will be gone. Immediately throw away soft pesudobulbs to prevent from spreading to other plants.

    After dividing, soak good bulbs in fungicide solution(you may buy either Captan or Physan) for about half an hour. Then keep in bright shade with good ventilation. Every three days spray with fungicide for about two weeks to a month. During this time keep it on dry side as too wet condition will promote fungal problem again.

    Hope this helps.

  3. #3
    Chris in Hamilton's Avatar
    Chris in Hamilton is online now Senior Member
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    Matt, did you ever get this problem straightened out?

  4. #4
    MCSchrum is offline Member
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    I think so. I believe it was severely dehydrated. I read online about someone else having a similar problem with mounted Dendrobiums indoors. They packed more sphagnum onto the mount so that it didn't dry out so quickly. I haven't lost a pseudobulb on this plant for a long time. Thanks for checking in. Have you had similar experiences?

  5. #5
    Chris in Hamilton's Avatar
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    I have this plant and although the symptom's don't sound quite the same I think it is the same problem. Mine is mounted and outside for the summer and I water it twice a day but perhaps it needs a longer soaking.

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