Orchids forum: Help! What IS this??

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Name: Patty
Sarasota, Florida (Zone 9b)
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SarasotaPatty
Jan 24, 2017 8:50 PM CST
What the heck IS this on this orchid? It's been doing this for a long time....

I've tried cutting off the weird leaves, new growth doesn't have it, but it seems to come on as the leaves age & grow larger. The backs of the leaves are ok for the most part. I've given it more sun AND less sun...it sorta reminded me of sunburn blisters. It doesn't seem to "infect" anything near it, and nothing else has it. I'm at a loss! Any ideas??
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Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Jan 24, 2017 9:46 PM CST
That's gross. It looks like it should rub off with a cotton ball dipped in alcohol. Does it?

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Name: Carol
Santa Ana,Ca. (Zone 10b)
Sunset zone 22
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ctcarol
Jan 24, 2017 9:50 PM CST
Could it be water blisters?
Name: Daisy I
Reno, Nv (Zone 6b)
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DaisyI
Jan 25, 2017 1:36 AM CST
Oh, that's a thought.
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Name: Joshua
Melbourne, Victoria, Australia (Zone 10b)
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Australis
Jan 25, 2017 1:54 AM CST

Plants Admin

May I ask what are water blisters? I have never seen anything like this before.
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Name: Alice
Saint Helena Island, SC (Zone 9a)
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ardesia
Jan 25, 2017 4:28 AM CST
Can you send a leaf off to UFL for analysis?
http://edis.ifas.ufl.edu/pp164

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Name: lindsey
wesley chapel, fl
Charter ATP Member I was one of the first 300 contributors to the plant database! Orchids
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sugarcane
Jan 25, 2017 7:10 AM CST
Wow...that is weird...maybe take a leaf over to Rafael at Plantio?
lindsey
Name: Patty
Sarasota, Florida (Zone 9b)
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SarasotaPatty
Jan 25, 2017 8:13 AM CST
I don't know what water blisters are....(unless they are on sunburned human skin!)

No, Daisy, it does NOT rub off...it is not ON the leaves---it is raised areas of the leaf itself that are brown.

Alice, I clicked your link, and it was an interesting article about oedema....but I didn't see anywhere/one to send a leaf to....

Lindsey, I'm setting up at Rafael's open house the last weekend of February so I'll bring the plant with me and see what he says.

Thanks y'all...if you have any more ideas, I'll take 'em!
Name: Alice
Saint Helena Island, SC (Zone 9a)
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ardesia
Jan 25, 2017 9:30 AM CST
Just take a leaf to your local extension office and they can send it off for you. The state labs can give you a diagnosis and a recommendation to remedy it. Elaine can probably help you with where the office is.
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Name: Elaine
South Sarasota, Florida (Zone 9b)
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dyzzypyxxy
Jan 25, 2017 10:27 PM CST
If the leaves had oedema, then got into some direct sunlight, the surface of the leaf could burn like that. The bottoms of those leaves look really healthy so I don't think it's a fungus or insect damage.

I've never known our Extension service to send leaves to the UF labs, but you could phone them and ask, Patty. 861-9807 gets you to the Plant Clinic line and there's someone there from 9 to 3 most days. They might have a botanist at the University that they can send pictures to, at least.

But I'd hang my hopes on Rafael, first. Maybe fasten those leaves up so the damaged side isn't facing the sun in the meantime?
Elaine

"Success is stumbling from failure to failure with no loss of enthusiasm." –Winston Churchill
Name: Alice
Saint Helena Island, SC (Zone 9a)
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ardesia
Jan 26, 2017 4:40 AM CST
Really? We send plant tissue samples off to Clemson all the time so we can get an accurate analysis of whatever the problem is. There is a small charge for the homeowner but it is minimal and it pays to have the right diagnosis.

However, I do think you are on to something with the dried oedema blisters. That makes sense.
Minds are like parachutes; they work better when they are open.
Name: Alex Junge
MN st paul, (Zone 4a)
Plantsmylove
Jan 29, 2017 4:08 PM CST
Maybe it's a virus or other issue. Useally if plants have a virus there's nothing you can do and it's best to start with a virus free plant


Viruses can just as with people spread to other plants
Toronto, Ontario (Zone 5b)
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Jasmin
Feb 14, 2017 9:06 PM CST
It does look like sunburn as Elaine suggested. Has the orchid been exposed to direct sunlight or heat?

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Name: Jim Hawk
Odessa, Florida (Zone 9b)
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hawkarica
Feb 15, 2017 7:28 AM CST
Our Extension sends lots of samples to UF but you may have to kick in a couple of dollars.

Jim
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Name: Alice
Saint Helena Island, SC (Zone 9a)
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ardesia
Feb 15, 2017 8:30 AM CST
I figured FL did the same testing. When I first became a MG these tests were all free now we have to pay a few dollars for everything, even soil tests. However, I am a big believer in the tests, no sense in guessing at what is wrong and possibly using the wrong treatment. It often turns out nothing is needed.
Minds are like parachutes; they work better when they are open.
Name: Patty
Sarasota, Florida (Zone 9b)
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SarasotaPatty
Feb 27, 2017 7:17 PM CST
Soooo...I took my orchid to Rafael this past weekend....he sorta laughed when I handed it to him and said, "You have cork!"

I said, "What?" (not sure I had heard him correctly...then I even made him spell it to be sure I was hearing what I thought I was hearing, and I was!)

He said it is caused by a SUDDEN, EXTREME change in environment! When he said my house must be very different from his greenhouses (cause it's one of his plants btw) I laughed and said, " my house is less than 10 miles away, it can't be too different!"

He said he has seen it on catts where it is much more severe, and it gets so raised that it looks like cork...

Anyhow, he said it is not contagious, it will be on the leaves that have it forever, and there is nothing I can do to change it, and I shouldn't worry about it.

So there ya have it...mystery solved. It's CORK!
Name: Carol
Santa Ana,Ca. (Zone 10b)
Sunset zone 22
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ctcarol
Feb 27, 2017 7:39 PM CST
Blinking Confused Shrug! Never heard of that before.
Name: lindsey
wesley chapel, fl
Charter ATP Member I was one of the first 300 contributors to the plant database! Orchids
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sugarcane
Feb 27, 2017 8:14 PM CST
Well there ya go!
Go ahead and mount a Brassivola to it! Hilarious!
lindsey
Name: Alice
Saint Helena Island, SC (Zone 9a)
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ardesia
Feb 28, 2017 5:00 AM CST
You learn something here every day. Thumbs up
Minds are like parachutes; they work better when they are open.
Name: Ken Ramsey
Starkville, MS (Zone 8a)
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drdawg
Mar 1, 2017 1:01 PM CST
Patty, I too think those lesions are simply "water-blisters". I personally don't think it has anything whatsoever to do with changes in climate but is related to heat on the leaves. Some orchids are very sensitive to sunlight and the least bit of sun on those leaves will cause this sunburn affect. As those water-lesions dry up, they leave a cork-like feel and appearance. Sunburn shows up differently in different leaf-forms.
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