Scales, scales scales!! Isolate immediately please and really inspect every Orchid nearby, especially Cattleyas. They get under the papery skin covering pseudobulbs and into every nook and cranny. Cymbidiums are magnets for these bugs!!
I would get the Bayer treatment in the blue bottles containing Imidacloprid. I myself would take a plant that badly infected and submerge it totally for a day.
http://www.bayeradvanced.com/r...
The dilution I use is 2 ozs/Gallon water.
If it weren't for this type of scale, I would be such a happy camper!! My greenhouse is never totally free of it, but I think with frequent inspection i manage to stay on top of it. Not always easy!!
Hope that helps!
