African Violet with Hairy New Leaves and Failed Blooms: Powdery Mildew or Mealybugs?

Without a photo, the dusty, hairy new growth and stunted buds suggest powdery mildew or mealybugs—both hard to eradicate on hairy violet leaves.

Treatment

Invert the plant and swirl leaves in warm soapy water for 30 seconds. Rinse with clear warm water. Repeat in a week if needed.

Your cyclamen likely have spider mites (also "dusty"). Repotting ailing cyclamen usually causes fatal root rot. Discard them to protect your violets.

House Plants: African Violet Leaf Bleaching and Spotting: Sunburn or Water Damage?; Curling African Violet Leaves with Fuzz: Fungal Disease or Cultural Stress?; African Violet Flower Color Change: Genetic Expression in Hybrid Plants; Curled, Brittle New Growth on African Violets: Fungus or Nematodes?; African Violet Crown Rot: Diagnosis and Prevention; Identifying and Treating Insects on African Violets; Why African Violet Leaves Grow Upward or Downward; African Violet Care: Year-Round Blooms, Varieties, and Toxicity; Cyclamen and Spider Mites on African Violets; Rejuvenating a Leggy African Violet by Re-rooting the Stem

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