Is this Cymbidium mosaic virus?

[varda.elentari]

Photo attached.
Thanks in advance.

[Ray]

Could be bacterial (acidovorax), fungal (guignardia) or a virus.

First, isolate it from your other plants, then, short of testing, the only thing I would recommend would be treatment with a copper-based product, as that would be likely to treat the first two. If new growth comes out clear, you're good to go.

[varda.elentari]

Thank you for a fast and informative response (as always)!

Could you refer me to some more info on how to treat with copper? I have this powdered copper product: Green Earth Bordo Copper Spray
– Les Serres Legault
Would this be suitable do you think?

---------- Post added at 02:42 PM ---------- Previous post was at 02:19 PM ----------

I forgot to mention the spots are on the underside of the leaf in case that would help narrow down the disease organism type?

[varda.elentari]

Can anyone recommend a good copper fungicide for orchids if the powdered copper isn't suitable? I'm not finding much detailed info online. Thanks!

[Roberta]

Phyton 35 is available in the US, don't know about Canada.

[varda.elentari]

Thanks Roberta! I'll see if I can find some. And if I can't, do you think that powdered copper product I have would work?

[Roberta]

I have never used powdered copper, would not know how to apply. Personally, I'd just isolate the plant away from your other ones, and see what the new growth looks like. I strongly suspect that it is bacterial or fungal. Cyms get ugly leaves quite easily. One definitely can't identify virus by appearance. The only way is by testing.

[varda.elentari]

I see. I didn't know that about Cyms actually. I only recently started growing them again and I guess I've been lucky with the few plants I got before this one.

Thanks for your help! I'll keep it isolated until the new growth appears and keep my fingers crossed.