White Spots on Phalaenopsis Petals: Mealybug Alert

Diagnosis: Mealybugs on Flowers

Sudden white spots on petals = mealybug infestation (cottony sap-suckers). They kill flowers fast and spread to plant.

Treatment

• Q-tip + rubbing alcohol on each spot (dissolves bugs).
• Spray insecticide (most work) — repeat weekly × 2–3 (kills hatchlings).
• Check entire plant — leaves, crown, roots, pot.

Act Fast

Mealybugs on flowers = established population. Full plant cleanup may be needed.