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May 15, 2020 3:54 AM CST

I have brown spots on simbidium leaves.Any ideas?
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May 15, 2020 5:26 AM CST
Name: Big Bill
Livonia Michigan (Zone 6a)
If you need to relax, grow plants!!
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Brown spots on Cymbidium leaves could be fungal, viral or insect caused. Without images, we can't say for sure.
We have a Cymbidium grower and expert here within the Forums so I am confident that we can get you an answer!
Welcome to the NGA and it's forums! Welcome!
Orchid lecturer, teacher and judge. Retired Wildlife Biologist. Supervisor of a nature preserve up until I retired.
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May 15, 2020 6:29 AM CST
Plants SuperMod
Name: Joshua
Melbourne, Victoria, Australia (Zone 10b)
Köppen Climate Zone Cfb
Plant Database Moderator Forum moderator Region: Australia Cat Lover Bookworm Hybridizer
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Welcome! noras to the site and to the Orchid forum!

Are you able to share some photos of your plant?

You may also find this post that I occasionally update with additional photos useful: The thread "Cymbidium Leaf Markings" in Orchid Insect and Disease Control-Part 1
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Avatar for noras
May 15, 2020 8:56 AM CST

Thumb of 2020-05-15/noras/b60912


Thumb of 2020-05-15/noras/439090


Thumb of 2020-05-15/noras/4c25cd

may be there are some bioweapon for that?
Last edited by noras May 15, 2020 9:43 AM Icon for preview
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May 15, 2020 9:28 AM CST
Plants SuperMod
Name: Joshua
Melbourne, Victoria, Australia (Zone 10b)
Köppen Climate Zone Cfb
Plant Database Moderator Forum moderator Region: Australia Cat Lover Bookworm Hybridizer
Orchids Lilies Irises Seed Starter Container Gardener Garden Photography
Thanks noras. Is this the only leaf with these markings?

I would be somewhat suspicious that the markings are caused by Odontoglossum Ringspot Virus (ORSV). Do you have access to the Agdia ORSV+CymMV test strips, or do you have a local orchid society that does (or can recommend a lab for virus testing)? It's possible it's environmental, but if it were my plant I would definitely want to have it tested to rule out ORSV.

In the meantime, if you have other orchids, you should isolate this one and ensure you clean your tools (and hands) between plants to avoid infecting any others, just in case this one is virused.
Plant Authorities: Catalogue of Life (Species) --- International Cultivar Registration Authorities (Cultivars) --- RHS Orchid Register --- RHS Lilium Register
My Notes: Orchid Genera HTML PDF Excel --- Lilium Traits HTML PDF --- Lilium Species Crosses HTML PDF Excel --- Lilium Species Diagram
The current profile image is that of Iris 'Volcanic Glow'.
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May 15, 2020 9:54 AM CST
Name: Big Bill
Livonia Michigan (Zone 6a)
If you need to relax, grow plants!!
Bee Lover Lover of wildlife (Raccoon badge) Orchids Region: Michigan Hostas Growing under artificial light
Echinacea Critters Allowed Cat Lover Butterflies Birds Region: United States of America
There is no "bio weapon" for a virus!
A virus can not be cured.
Orchid lecturer, teacher and judge. Retired Wildlife Biologist. Supervisor of a nature preserve up until I retired.
Avatar for noras
May 15, 2020 10:33 AM CST

thanx,but i dont wanna use chemicals,thats why i was asking you for something biological
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May 15, 2020 11:00 AM CST
Name: Big Bill
Livonia Michigan (Zone 6a)
If you need to relax, grow plants!!
Bee Lover Lover of wildlife (Raccoon badge) Orchids Region: Michigan Hostas Growing under artificial light
Echinacea Critters Allowed Cat Lover Butterflies Birds Region: United States of America
Noras, re-read my answer please. There is no way to cure a virus! No chemical or biological cure.

That is why Australis said to isolate the plant and make sure you clean your tools. You can't cure a virus, you can only try and prevent its spread.

Look at the current Covid-19 crisis. There is no cure for it. Just ways to treat and support a victim to lessen the symptoms. You then have to develope a vaccine to protect someone going forward. With the support of medical staff a person can recover from the virus because their body is able to fight it off. You body is able to build up antibodies so that you theoretically can't catch it again.
Look at a common cold. There is no way to cure a cold. That's why you can catch a cold again and again. They are caused by a virus and each cold that you get is actually a different virus.
Orchid lecturer, teacher and judge. Retired Wildlife Biologist. Supervisor of a nature preserve up until I retired.
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