Cymbidium bulb rot and yellowing leaves in Semi-Hydro.
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Old 09-05-2012, 09:08 AM
empiref empiref is offline
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Cymbidium bulb rot and yellowing leaves in Semi-Hydro. Male
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Quote:
Originally Posted by Cym Ladye View Post
Ray is correct in his comment on "crown rot" in Phals but it is caused by the same thing in Cyms. The rot starts with water held in the growth, usually the new growth, for too long a period. When the growth slows down, the leaves fail to develop and lengthen rapidly and what I believe is a fungal infection gets started. It can kill the plant or stop with the new growth.

As I was thinking more about your problem, the signs you showed could also come about if the growth were just slightly broken at that point causing it to then die the rest of the way. There would be no odor in that case.

The general look of the shriveled BBs on your plant tells me that prior to your getting it, it had undoubtedly been over watered to cause root death and the resulting shriveled bulbs. The poor plant was trying desperately to survive on the food stored in the bulbs!

Your goal now is to get new growths started ASAP with good culture, which will send down new roots to sustain the plant. Removing the leaves off the oldest bulb, especially if it only has two or three leaves, and thus converting it into a "feeder" bulb might help too. This way, the bulb could give all its energy to the rest of the division and not have to try to sustain its own leaves.

Good Luck,
CL
Cym Ladye,

Thank you very much for your advice, as you mentioned there was no foul odor whatsoever in the pot or on the dead new growth.

Today I watered my Cyms, and flushed the pot of the cym in question with a 5%/L or Hydrogen Peroxide.

There seems to be no deterioration with the cym, and today I found a new growth on it, between a new growth and an old bulb (hopefully it is a spike). I took your advice and removed the leaves on one of the oldest bulbs, which had only three leaves, and did the same thing on other cyms too. i got rid of the leaves on the bulbs containing two or three leaves to convert them into "feeder" bulbs like you mentioned.

New growth on the cym in question:


Before leaves removal:


After leaves removal:


Here's something I found on a different cym while watering, I thought these are flower spikes!!
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attached, bulb, bulbs, leaves, started, semi-hydro, yellowing, rot, cymbidium


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