It's been surprising to me how many plants will tolerate spraying with alcohol. Any leaf with a shiny or "waxy" finish (citrus, pothos) or anything succulent-ish even seems able to withstand full 70% OTC strength, and most plants will handle a 1:1 dilution of that with water. ALWAYS TEST on just a couple of leaves/stems first! A squirt of dish soap (Dawn) can only help, too. If it's just a few mealies, you can touch each one with a q-tip dipped in 70% rubbing alcohol -- but be sure to go back every few days and hunt for more, in order to break the life cycle.
If that's not mealy bugs in the photo, it's at least sticky looking residue on the plants, aka "honeydew" that drips from foliage infested with aphids, scale, or (again) mealybugs.