Are all the leaves affected??
I am not sure about the phal (schilleriana I believe?) but those darker spots can be anything from bugs, fungal, sunburn, bacterial. I doubt viral.
But all others, including that small leaf in the back of the Schilleriana, I highly suspect virus, if not mites of some sort.
Either case, I would cut off the leaf if it is on just on leaf and just hope that the ugly does not return. lol
If more than one leaf is affected, I would send a leaf sample for testing.
If the plant is not of much value, then I would toss them all without thinking for another second.
Especially if you have a large collection, or have other valuable plant, it is not worth all the headache and risk of spreading, whether it be virus, bugs or other disease.
There are always lovely orchids in bloom to buy out there in the market. lol
|