Q: What could be the cottony white fuzzy stuff on my houseplant stems? How do I get rid of it?
A: It’s very likely your plants are infested with mealy bugs. They are kin to scale insects and both suck plant sap. Mealybugs protect themselves under a covering of white fluffy wax. On a day when you are filled with patience, touch each one with the tip of a cotton swab that has been soaked in rubbing alcohol. This will dissolve the wax and kill the insect beneath.