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02-03-2011, 09:10 PM
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Black spots on Cattleya leaves
Hello,
I purchased a small Cattleya division online and it came with black spots on leaves. I potted it into bark mix. Could you please look at the picture and let me know if this black stuff is just physical damage or fungus or other type of disease. Should I cut off the parts of the leaves where black is?
Thanks a lot
Last edited by orchideya; 02-03-2011 at 09:37 PM..
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02-03-2011, 09:27 PM
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Senior Member
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Join Date: Jan 2009
Zone: 5a
Location: Kansas City, MO
Age: 66
Posts: 4,773
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It looks like a fungal infection to me. Does this little guy have any roots?
Joann
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02-03-2011, 09:34 PM
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It seems like roots were cut short, maybe to fit into the small pot it came with. The newest growth has some fresh green roots, but they look cut too. Would it grow new roots? Should I remove the black leaves? There is a bit of black on bulbs and newest growth too. What do I do? Please help.
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02-03-2011, 10:03 PM
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Senior Member
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Join Date: Jan 2009
Zone: 5a
Location: Kansas City, MO
Age: 66
Posts: 4,773
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Can you post a picture showing the other side of the plant? Is the black on the newest growth on the paper sheath or actually on the pbulb?
If this were my plant, I would cut the black portion off the leaf and treat the cut with cinnamon.
Joann
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02-03-2011, 10:11 PM
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Senior Member
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Join Date: Apr 2010
Zone: 6a
Location: Pennsylvania
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I would cut off the blackened leaf an inch into clean tissue as there are plenty of other green leaves.
I do not see any good roots on the plant so I would pot it up and keep it a bit on the dry side after soaking my media in some solution with KLN (one tsp per gallon).
Use a rhysome clip or tie it up to a stake for support.
Good luck
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02-03-2011, 10:37 PM
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Senior Member
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Join Date: Jul 2010
Zone: 10a
Location: SW Florida
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Did you purchase from a known grower or "joe's orchids and velvet paintings"?
A good dealer should exchange, replace, credit, or at least explain.
If it's a dealer, send them the pics and ask. You can try the same with "Joe's Orchids", but.....
Sometimes you get a deal and sometimes you get what you paid for. If there's no recourse, I would assume it's fungal (it may not be) and treat with a good fungicide, isolate from my other plants, and watch it. If the bad area expands, I would perform surgery and retreat with fungicide. If it continues to expand, I would cut my losses and move on. Sorry.
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02-03-2011, 11:04 PM
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I digged it out of the pot and it came apart into two pieces. One - larger one with new growth has a bit of roots, the other one - no roots. I cut off some black parts, potted bigger part with roots back into bark, and placed the rootless part into ziploc bag with sphagnum moss.
There are black spots on the new growth, so I don't know what will come out of all these manipulations. Will do what I can and hope for the best.
I think it was "you get what you paid" case and should teach me to buy from known dealers.
Thank you very much everybody for the valuable info.
Last edited by orchideya; 02-03-2011 at 11:14 PM..
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02-03-2011, 11:20 PM
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Senior Member
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Join Date: Jul 2010
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Location: SW Florida
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Best of luck. We've all been there and done that. I picked up a plant at the Tamiami show last weekend that had tape over the bark and roots. I knew better, but "big show, big vendor". Didn't open it up thinking it would make it home without spilling bark. When I looked that night, the pot was full of white fungus. We all get carried away and have to keep reminding each other not to do what we all want to do "in the moment".
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