If you've noticed tiny white bugs on your houseplants, your plant could be suffering from an infestation of one of several pests that commonly live and feed on indoor flora.
Mealybugs are small, whitish insects. They are about one-eighth to a quarter inch long and sometimes have a cottony appearance. Mealybugs can be removed by hand and then destroyed by wiping them with a cotton swab dampened with rubbing alcohol. A plant that is heavily infested should be destroyed.
Whiteflies take their name from their powdery white appearance. They are about one-sixteenth to a tenth of an inch long and look like tiny moths. You can remove whiteflies from houseplants by washing plants with a spray of water and then spraying them with insecticidal soap. Vacuum flying adult whiteflies out of the air.
If you've noticed white waxy or weblike spots on your plants, you may not have realized you were looking at scales, insects that hide under white or brown scales. Removal involves scraping the scales from the plant and then spraying it with insecticidal soap to kill immature insects.