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This is a discussion on Strange splotches on Catt leaves within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; Hey all! I recently purchased a Catt from a nursery in SC, and it arrived ...
Hey all! I recently purchased a Catt from a nursery in SC, and it arrived with this strange looking pattern all over some of the leaves:
I could tell that the splotches were spreading, as some areas were beginning to yellow from within, showing the first signs of what would eventually become these brown, jaggedy-edged spots. The leaves that were affected the worst were mostly yellow, and destined to fall off.
About 75% of the leaves were affected. I contacted the vendor, who immediately sent me a replacement plant, which is completely healthy. I have removed all the affected leaves from the original plant and isolated it from the rest of the herd. The remaining leaves appear to be healthy, and none of them have developed any blemishes as of yet, but I'm keeping an eagle-eye on it.
After replacing my plant, the vendor contacted me again and said she had found similar spots on several of her other catts as well. There were two other affected plants from the same tray that mine had come from, and there was also a mature catt of the same grex that had some leaves affected. She was particularly upset about her mature catt, since it was from her personal collection.
She is desperately trying to figure out what this is. The nursery that sold her the tray of plants told her it's likely that it's hyper-pigmentation from the sun, but that sounds WAAAAAY off to me, especially since these are green-flowered plants, and in my experience, sun-spots look nothing like this at all.
They also said it could be a particular fungus caused by too much humidity, but she doesn't think that's the case either, since so few plants have been affected, and whatever it is seems to be limited to this particular grex. If it were too much humidity in her greenhouse, she believes more plants would be showing symptoms.
I offered to share the pic with you folks and see if anyone recognized this ailment so I could pass on the news to her. She's very frustrated and ready to march down to the nursery that she bought these from to confront someone and get a straight answer.
Can anyone identify this pattern? Even if you could just tell me "virus," "fungus," or other general category of ailment, that would be helpful.
I would say Cymbidium mosaic virus
The disturbing thing is that these plants came to the lady I bought them from in trays from a VERY well-known nursery. You'd think they'd notice something like this on their plants. Sheesh.
the virus would be systemic...keep it isolated or destroy it.
Whenever I see those circular patterns like that, I think virus. I would certainly isolate the plant. Good luck.
According to the "online encyclopedia," the virus has no cure and can be spread to nearby plants without even making contact with them. Here's a direct quote from their page on the mosaic virus:
"There is no way to cure a plant that has the virus. The only thing to do once a plant is infected is to destroy it." This definitely makes me sad. I also can't remember which exact scissors I used to cut off the infected leaves, so I'm going to have to pretty much sanitize EVERYTHING I could have possibly used. (I know I should be better about sanitizing everything before and after trimming, but I admit to being lazy about that sometimes... but I've never dealt with a virus before).
Anyway, the site even talks about chemicals you should use to get the virus off human nails so that you don't infect another plant just by TOUCHING IT.
There is no way I could possibly keep this plant isolated enough that it wouldn't risk infecting my other ones. Even if I stuck it in its own little corner, it wouldn't be a corner with optimal growth conditions; all my Catts sit in my bright grow area... the infected one would just wither without enough light. There's really nothing I can do for it, and it poses a risk to my other plants. If someone wanted it, I'd happily send it to them, but I don't know if anyone would want a plant that has viral symptoms.
No, I think this one is going to have to go. I haven't "done the deed" yet, though... I have to work up the nerve.
At least I have a second one. I don't usually keep duplicate plants anyway, due to lack of space. While I usually give away any extra plants, in this case I think it's a given that no one is going to want the original, infected plant.
I'm just going to have to bit the bullet and chuck the poor thing.