Black spots on Dendrobium spectabile leaves and cane
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  #1  
Old 10-24-2018, 04:00 AM
avisignis36@gmail.com avisignis36@gmail.com is offline
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Black spots on Dendrobium spectabile leaves and cane
Default Black spots on Dendrobium spectabile leaves and cane

Help! My den spectabile seems to have a bacterial or fungal infection. It has numerous black spots on the leaves. It seems like they have increased in number (but not size) over the past few weeks. None of the leaves have turned yellow or brown or wilted, and the roots seem to be continuing to grow well. Most concerning I think is the black depressed ring around the youngest cane. What should I do - do I need to cut away all areas that seem diseased?
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  #2  
Old 10-24-2018, 10:27 AM
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It's not unusual for Dens to get all sorts of spots, often it's due to lack of air flow, when grown inside. But it seems that you grow yours outside? Not sure about the black ring on the cane, I don't grow many Dens...
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  #3  
Old 10-24-2018, 01:21 PM
avisignis36@gmail.com avisignis36@gmail.com is offline
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Black spots on Dendrobium spectabile leaves and cane
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I just recently put it outside. Before, I had it inside near a window in a room with a constant fan to move air. I have recently had several plants that clearly did have some kind of rot on their leaves, and the most affected one was my den kingianum. I've been pretty aggressive with cleaning and cutting back anything that looks like rot, and it seems fairly under control at this point. But the spectabile just looks different, and the leaves don't seem to be suffering or dying (the spots have been there for a while). So I don't know if it's related, and I'm mostly concerned with the blackness on the cane.
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Old 10-24-2018, 07:12 PM
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Black spots on Dendrobium spectabile leaves and cane Female
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Mine did the same thing. My opinion was it was due to my irregular care. I just gave it away, with bud nubbins and all. No room.
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Old 10-24-2018, 08:22 PM
rbarata rbarata is offline
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Black spots on Dendrobium spectabile leaves and cane Male
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I wouldn't worry about that. At least in my case I consider it normal.
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Old 10-25-2018, 02:29 AM
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Black spots on Dendrobium spectabile leaves and cane Female
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As far as the dark area on the cane, just keep an eye on it. If it starts to feel soft and spongy and spreads, then it may need amputating, but don't rush to cut. Cutting is permanent, and if you make a mistake you can't put it back. Don't worry about the black spots on the leaves, I see no sign of anything to worry about there. just observe.
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