Dendrobium nobile with black spots
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  #1  
Old 01-15-2014, 01:33 AM
master_xelis master_xelis is offline
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Dendrobium nobile with black spots
Default Dendrobium nobile with black spots

One month ago I bought this Dendrobium nobile. It has been in the outside of the house. Weather here in Mexico has been cold (about 14 C in the day and 6 C in the night), also it's been raining. The exception was last week in which there was a heater weather.
About a week ago I noticed some black spots in the base of the leaves of the Dendrobium. I have no idea why.
It has been in a place with shadow, but I read that Dendrobiums need some Sun during Winter, that's the reason why I changed the place to a one with better sunlight, but not really direct sunlight. It is behing a rose plant.
If some of you know the reason of the spots and what to do, let me know.
Photos are below:
Dendrobium nobile with black spots-ndsc_0582-jpg

Dendrobium nobile with black spots-ndsc_0583-jpg

Dendrobium nobile with black spots-ndsc_0584-jpg

Dendrobium nobile with black spots-ndsc_0585-jpg

Update (011514):
Sonya asked me if the canes are firm where the dark patches are, and that's true.
At the time I went to confirm this, I noticed that a leave has a white spot and that there is a new cane growing but with a very white color.
I think that the white spot is because of a sunburn, right?
Is the color of the new growth normal?

Photos:

Dendrobium nobile with black spots-ndsc_0586-jpg

Dendrobium nobile with black spots-ndsc_0587-jpg

Dendrobium nobile with black spots-ndsc_0588-jpg

Last edited by master_xelis; 01-15-2014 at 02:53 PM.. Reason: Conditions update.
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  #2  
Old 01-15-2014, 02:36 PM
WhiteRabbit WhiteRabbit is offline
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Some (leaf and sheathy material around the cane) might be natural and age related. The dark area at the tip of the cane might be from stronger light ...

Are the canes firm where the dark patches are?
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  #3  
Old 01-15-2014, 02:48 PM
master_xelis master_xelis is offline
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Dendrobium nobile with black spots
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Yes, canes are firm in those places.
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Old 01-16-2014, 06:45 PM
WhiteRabbit WhiteRabbit is offline
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Photo #3 - I cannot tell ... is the pbulb split there in the dark area?
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  #5  
Old 01-16-2014, 07:51 PM
master_xelis master_xelis is offline
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Dendrobium nobile with black spots
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No, it is not split. It is dark but there's no damage on the pbulb.
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Old 01-16-2014, 07:59 PM
WhiteRabbit WhiteRabbit is offline
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I'd watch it, but it's likely not cause for concern if those areas are firm.
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Old 01-16-2014, 08:04 PM
master_xelis master_xelis is offline
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That's great! What do you think about the color of the little new growth?
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Old 01-17-2014, 03:12 PM
WhiteRabbit WhiteRabbit is offline
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I think it looks ok
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