Orchids forum→Cymbidium leaf spots

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noras
May 15, 2020 3:54 AM CST
I have brown spots on simbidium leaves.Any ideas?
Name: Big Bill
Livonia, Michigan (Zone 6a)
American Orchid Society Judge
Region: United States of America Critters Allowed Growing under artificial light Echinacea Hostas Region: Michigan
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BigBill
May 15, 2020 5:26 AM CST
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!
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Businessman, Orchid grower, hybridizer, lived to 107!
Name: Joshua
Melbourne, Victoria, Australia (Zone 10b)
Köppen Climate Zone Cfb
Region: Australia Bookworm Cat Lover Lilies Orchids Irises
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Australis
May 15, 2020 6:29 AM CST

Plants SuperMod

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
Plant Authorities: Catalogue of Life (Species) --- International Cultivar Registration Authorities (Cultivars) --- RHS Orchid Register --- RHS Lilium Register
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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 (+)]
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Name: Joshua
Melbourne, Victoria, Australia (Zone 10b)
Köppen Climate Zone Cfb
Region: Australia Bookworm Cat Lover Lilies Orchids Irises
Seed Starter Annuals Container Gardener Garden Photography Forum moderator Avid Green Pages Reviewer
Image
Australis
May 15, 2020 9:28 AM CST

Plants SuperMod

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'.
Name: Big Bill
Livonia, Michigan (Zone 6a)
American Orchid Society Judge
Region: United States of America Critters Allowed Growing under artificial light Echinacea Hostas Region: Michigan
Butterflies Lover of wildlife (Raccoon badge) Orchids Cat Lover Birds Bee Lover
Image
BigBill
May 15, 2020 9:54 AM CST
There is no "bio weapon" for a virus!
A virus can not be cured.
Rodney Wilcox Jones, my idol!
Businessman, Orchid grower, hybridizer, lived to 107!

noras
May 15, 2020 10:33 AM CST
thanx,but i dont wanna use chemicals,thats why i was asking you for something biological
Name: Big Bill
Livonia, Michigan (Zone 6a)
American Orchid Society Judge
Region: United States of America Critters Allowed Growing under artificial light Echinacea Hostas Region: Michigan
Butterflies Lover of wildlife (Raccoon badge) Orchids Cat Lover Birds Bee Lover
Image
BigBill
May 15, 2020 11:00 AM CST
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.
Rodney Wilcox Jones, my idol!
Businessman, Orchid grower, hybridizer, lived to 107!

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