What kind of pest is this and how do i deal with it?

[Roberta]

I'd go with straight bark on the Dendrobium. Maybe mixed with a little sphag for the Oncidium.

[K.O.]

Thanks Roberta!!

[aliceinwl]

I’m not sure about the beetles. If you post a picture, I can see if I recognize them.

[Dollythehun]

I use Dawn, it's never killed anything. If you're nervous, ho buy a generic soap. You're only after changing the water tension and smothering them.