My cymbidium and phalaenopsis orchids have developed a white powdery substance on leaves and stems. what is it

Question

what can i use to cure it.

Answer 1

Well...this might sound a bit daft...and I might be wrong..don't know too much about orchids in particular. But I do know they need a moist atmosphere and they recommend spraying them with water now and again. If you DO do this..and your water is rich in calcium you could get calcium salt deposits on your plant leaves once the water evaporates. Therefore it's usually recommended to use distilled water for this. If it IS a disease, I'm afraid I can't help you..never noticed it on a orchid myself. There's lice that have a powdery coating on them (don't know their name in english), but I have a feeling orchids wouldn't be prone to developing this pest...

Hope it helps...