Help, what is this?

[armin]

I've noticed some black spots on my Zygopetalum today... I don't know what it is...
The plant is: Zygopetalum (Pinaroo x Titanic). It's placed on a south-west window.
I spray my orchids every morning to simulate the dew, I water them according a schedule... everything is fine with the bloom but the leafs....
Hope is not something bad I thought it may be the gentic thing...with the hybrid in the sun?... any idea?

[sjMagoo]

Hi - my 2cents worth:
Zygos are famous for developing tiny black spots on the leaves - it's not a virus or anything bad, just conditional. I believe they prefer indirect light, easy on the fert, and no misting, yet medium kept moist.
At least that's the way I grow mine and it grows like a weed! And, yes, even with those conditions it has some black spotting. If you love the flower, you just put up with the spots!

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[Kris]

i agree, its hard to find a zigo that has nto black spots on it.

[Tindomul]

Same thing happens with Oncidium. You mist them, they turn into bananas.

[Kris]

[justatypn]

Excellent advise and to simplify...

You mist them, they turn into bananas.

[Ross]

You know, the over-ripe ones

[christina waines]

In order to cut down or eliminate spotting you need to stop misting on cold dark days, only mist (if you must mist) on bright sunny mornings. Spots occur on leaves that have water droplets sitting on leaves for long periods. You must also increase the air movement. I have a fan blowing directly towards my zygos so the leaves are always blowing gently in the wind. They don't like cold stagnant humid air.

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[Barbara]

Originally Posted by christina waines

In order to cut down or eliminate spotting you need to stop misting on cold dark days, only mist (if you must mist) on bright sunny mornings. Spots occur on leaves that have water droplets sitting on leaves for long periods. You must also increase the air movement. I have a fan blowing directly towards my zygos so the leaves are always blowing gently in the wind. They don't like cold stagnant humid air.

Exactly, this is how I treat my zygo's and they don't get the dark spotting anymore. This is also true of many plants.

[Kris]

yep should work for Sharry Babys and other oncids prone to spotting