It does sort of look like rot. I have not experienced this yet with my Angraecoids, but did with Haeralla. The crown was damaged due to rot and it responded, after a liberal dose of Thiomyl, by sending out three new growth shoots! I think lots of problems come from fan location, cool drafts, etc. The plant in the photo looks pretty dark to me, darker than any of my plants. The lowest light in my tank, at the bottom under all the hanging plants, is still 600-700 foot-candles (6000-7000 lux). My Angraecoides are all positioned to receive a minimum of 1500 foot-candles (15000 lux).
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Ross
http://orchids-ross.blogspot.com/
I don't do most Dendros or large, "floofy orchids". For me it's minis (like Angraecoides), Masdies, Paphs, and others that crept in somewhere along the line. See my orchid list for complete collection (usually not current.)
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