White Fuzzy Growth on Plant Stems and Leaves: Likely Whiteflies, Not African Violet

A reader described a plant from their child's preschool—initially with a purple flower, now flowerless for two years, with white fuzzy deposits on stems and leaves that wipe off with a damp towel. The plant may not be an African violet.

Identifying Whiteflies

The description matches whiteflies: tiny white insects that cluster on stems and leaf undersides, leaving a cottony residue. They suck plant sap, weakening growth and preventing blooming. The "water drop" and "cotton ball" appearances are typical whitefly life stages.

Treatment Options

Use insecticidal soap (available at garden centers) following label directions, or a targeted insecticide spray. Thorough coverage of leaf undersides is essential. Repeat treatments may be needed. If the plant isn't an African violet, identify it first for species-specific care.