multiple orchids in one pot, one has mealy bugs

[kvet]

Hi:

I have read the current thread on mealy bugs, and plan to get the appropriate insecticide.

My situation is a little different, and I'm not sure what to do with next steps. Short version: I found six mealy bugs this morning on the dendrobium, that's in the same pot as a phal and zygo. Neither the phal nor zygo have any bugs that I can see after a thorough investigation. The link here takes you to my ID post, and shows you the three orchids I have.

What should I do? Take apart the pot, clean everything up with insecticide? Can I just do this with plants in the pot without disturbing them?

Before you chastise me for putting three orchids in the same pot, just understand, I did not know any better three years ago; they were gifted to me by mom and she did it. Her fault!

The pot is a taller pot, about 2ft high, and filled with large orchid bark. Each orchid was left in the original plastic pot, with the bottom cut off and gently placed into the medium. This was 2.5 years ago. All three are thriving - have bloomed consistently, pushed out plenty of new roots and growth. I did nothing but water occasionally and randomly open/close the curtain for daily light at the east-facing window. Ignorance can sometimes be bliss

The phal has super long roots, two are circling the inside rim of the pot..woah!

I am 99% certain the mealy bugs came from two phals I purchased at the farmer's market earlier this year. Ugh.

Thank you for your time!