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Old 05-31-2013, 01:34 AM
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I can't tell for certain from the picture but I would be concerned. I use isopropyl alcohol on anything suspicious to disinfect and dry. If I suspect rot, I perform surgery, then use the alcohol. I have dealt with both brown and black rot. Not fun. Here are two sites that I hope will help you:
Orchid Pests, Orchid Diseases
http://www.houstonorchidsociety.org/...ySueBottom.pdf
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