Zygopetalum spots- bad or just unattractive?
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  #1  
Old 10-13-2017, 12:03 AM
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Fishkeeper Fishkeeper is offline
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Zygopetalum spots- bad or just unattractive?
Default Zygopetalum spots- bad or just unattractive?

Man, those care sheets aren't kidding about zygopetalums and their hybrids spotting easily.

Assuming the spots don't cover a significant portion of the leaf, they're purely cosmetic, right? I'll try to prevent them, but it'd be good to know whether they're actually a problem or just a cosmetic issue.
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Old 10-13-2017, 04:35 AM
jcec1 jcec1 is offline
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Zygopetalum spots- bad or just unattractive?
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I believe it is just cosmetic, according to what I've read. I have about ten zygopetalums and they don't suffer from spotting. I wonder if it is temperature related? They rarely get above 21-22C which is probably a lot cooler than most.
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Old 10-13-2017, 05:04 AM
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Zygopetalum spots- bad or just unattractive? Male
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How do you fertilize them, if you do...?
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Old 10-13-2017, 05:08 AM
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Zygopetalum spots- bad or just unattractive? Male
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I have certain Cymbidiums and Oncidium-alliance plants that spot easily. I find that the spotting decreases with regular calcium supplementation (either gypsum, or calcium nitrate).
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Old 10-13-2017, 05:56 AM
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I have only a few spots.I keep the water off the leaves and run a fan on them. It never gets above 75f.

Last edited by Dollythehun; 10-13-2017 at 02:12 PM..
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Old 10-13-2017, 01:01 PM
Maryanne Maryanne is offline
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Zygopetalum spots- bad or just unattractive?
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I have read that the dark spots are one or more types of fungi. Could be other things, the research has not identified yet.

I've had pretty good luck keeping spots to a minimum on Zygos and Oncidiums by using Neem. It's a natural oil extracted from a tree, Azadirachta indica. Has an odd smell which does fade after a day or so. (Not as bad as skunk ; -) It is effective against various fungi and insect pests, but not harmful to beneficials, pets, humans. (Although I would not eat it)

Use according to directions on the bottle. Keep plants out of sunlight after spraying until dry...I spray at night or on cloudy days. It won't heal the old spots, but new growth is much cleaner.

Good luck~
Maryanne
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Old Yesterday, 02:10 AM
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Zygopetalum spots- bad or just unattractive? Male
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Experienced growers have told me spots on Zygopetalums can be avoided by proper temperatures (low), humidity (high), water (very pure) and air circulation (excellent.) If one of these four is off, there will be spots.
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