Onc. Makali 'Gotom' X Brs. Rex 'Sakata' Black Spots and Leaf Curl
 

Hello-
I have a Onc. Makali 'Gotom' X Brs. Rex 'Sakata' that has developed blackish brown spots on the leaves which appear to be turning yellow. The leaves are also starting to curl under. (This all occurred after the plant bloomed this spring.) I’ve also noticed white flies. Could these flies be causing the problem? Or is it fungus or bacteria? Is the leaf curl a result of low humidity? I’m new to Orchids, (and this forum) and am having a difficult time diagnosing the problem. Any help is appreciated. Pics are included. Thanks