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This is a discussion on Cymbidium mosaic and dendrobium anosmum within the Orchid Ailments / The Compost Pile forums, part of the Orchid Culture category; I am hoping I am having bad luck here, but I have tried 5 different ...
I am hoping I am having bad luck here, but I have tried 5 different suppliers and 5 different dendrobium anosmum plants and all 5 have had CymMV! I have had to throw them out and deal with trying to get a refund....
I really like them, but I cannot risk the rest of my collection with infection over one plant. I have done research and can't find much about the infective rate.
Are all of them infected in the trade or am I having bad luck?
Thanks Cathy for the link. Very interesting indeed. I personally have not heard of any virus infected species dendrobium among growers here. Most of our cultivated dend species esp those from Thailand are wild collected I believe.
@wfuavenger :- Were your anosmum lab-tested for CymMV or from visual assessment ?
Lab tested and field tested with immunostrips
I have gotten good at spotting disease in dendrobium anosmum. I will post a telltale picture of the leaves later today. Every grower kept telling me that "it's fine, it's just dropping its leaves for winter." And I would field test and it would be positive.
Above is a dendrobium with CymMV. Take note of the raised dark green "freckles". It does not express this in all of the leaves.... Just a few and usually any age range.
I grow figs trees in pots as well. It seems Mosaic Virus in figs is widespread in Ficus carica. Even trees at the Brooklyn Botanic Garden are affected. Many growers do not care. I think I have 1 or 2 figs with Mosaic Virus but mostly are healthy. I noticed that with good culture and extra fertilizer + water + sun the spotting on the leaves disappears. The symptoms appear when the plant is young or stressed or is coming out of dormancy. Somehow like Herpes simplex in humans affected. Anyway, couldn't that Dendrobium leaf be a symptom of a different issue?
should the plant be destroyed or not? I know that many Fig growers do not care much if a tree is affected.
Last edited by stefpix; November 23rd, 2012 at 12:55 PM.
---------- Post added at 01:58 PM ---------- Previous post was at 01:51 PM ----------
You should destroy them and take a loss. Virus weakens the host organism.
The mentality of the fig growers is similar to that of the beekeeping industry. And now the industry is having huge problems.
To use your analogy, why would you knowingly give people herpies?!?!?!
The plants should be destroyed and it would be a small loss competitively.
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UCD (University of California /Davis) they have a fig propagation program, they distribute cuttings of named varieties and for the most part are infected.
I believe that virused plants should not be distributed. Most of the Brooklyn Botanic Garden figs are virused. I noticed green leaves there with a similar discoloration as your Dendrobium, but then those signs disappear when the weather gets warmer and new growth takes off. I wonder if in Orchids the mosaic virus may be present and asymptomatic and only show up when the plant is stressed by other co factors