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Old 08-21-2013, 09:42 PM
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Is this black rot?

I received this C. Hardyana Exotic Orchids X Self a couple months in not very good shape, with wrinkled pbulbs. I potted it up immediately (I think I received it bareroot) in mostly fir bark. Within 6 weeks, I noticed that the sheath around the base of the newest pbulb was black - 1st pic. 2 weeks ago, I repotted in 1/3 sphag and 2/3 CHC with a little charcoal and cut off the larger wrinkled pbulbs as they had no roots at all. Now, there are black spots on the front and back of the leaf - next 4 pics. I tried to peel off the black at the base, but it did not come off easily. Is this a disease? Could it be **whimper** black rot???
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Old 08-21-2013, 10:17 PM
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Blackvine, I think you may have had another black rot victim recently?

If so, then yes, sadly, this could be another one. Recommendations for that plant also apply here. keep a close watch on your other plants.
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Old 08-21-2013, 10:26 PM
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Hi, Catt - no that was Love_My_Soldier who had the black rot issue. You remember it as me because I chimed in a few times on that thread. Darn, darn, darn. Paid 23 buck for this one. Fortunately, it has no sentimental value. I just sequestered it. Really weird because that black base showed up 2 weeks ago and nothing else in my grow room seems affected. I hope. Fingers crossed!

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Old 08-22-2013, 03:22 AM
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OK, thanks for the correction! I obviously dis-remembered incorrectly

I would still follow the suggestions given previously on that other thread. Maybe you can catch it before it progresses too far. I have been able to save a plant or two in the past by cutting bad tissue out or dividing good tissue from the bad.
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Old 08-22-2013, 08:28 AM
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I opened a thread on My Cattleya a week or so ago, had an issue with this (I thought was sunburn, but it spread) and I cut off all the parts, used alchohol over the entire plant and cinnamon on the wounds- and *fingers crossed* haven't seen any more issues! I also got dry milk as leafmite suggested and will use that every now and then when watering for calcium. Good luck Blackvine!
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Old 08-22-2013, 08:31 AM
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Cut off the little piece and alcohol the entire plant except for the roots. You might save it. In cattleyas, this is usually a sign of calcium deficiency. If it was near other cattleyas, you might want to alcohol their growths and then increase the calcium.
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