They feed by sucking plant sap. Their feeding causes stunted and distorted leaves. Heavy infestation can cause leaf and plant death. Avoid bringing these pests into the house by inspecting a new plant carefully, including the bottom of the pot, for mealybug eggs. Light infestations of mealybugs can be controlled by removing them with a cotton swab dipped in alcohol.
Heavy infestations are more difficult to control.
The waxy material that covers mealybugs protects the adults from insecticides. The immature nymphs are susceptible, however. Use houseplant insect sprays according to label directions. African violet flower buds may fail to open, turn brown and fall off. Unfavorable environmental conditions such as low temperatures, poor soil aeration, wet soil or excessively dry air contribute to flower failure.