Whitefly: How to Clear the White Cloud From Your Plants
If tiny white flies take off when you move the plant, it's whitefly. Learn to identify and eliminate it with yellow traps, soap and persistence.
Touch a plant and a cloud of tiny white flies rises up? That's whitefly, a very common pest, especially in the garden (tomato, zucchini) and on houseplants. Like aphids, it sucks sap, weakens the plant and leaves sticky honeydew.
How to identify it
- Tiny white flies (2 mm) on the undersides that fly off when you move the plant.
- Immobile larvae, like translucent oval scales, stuck to the undersides.
- Sticky leaves (honeydew) and sometimes black sooty mold.
- Yellow leaves and a weakened plant.
Step-by-step treatment
- Isolate the affected plant.
- Yellow sticky traps: whitefly is strongly drawn to yellow; they cut the adult population a lot.
- Spray with insecticidal soap or neem oil, covering the undersides well (where eggs and larvae are). Repeat every 4-5 days for 3 weeks.
- Gently vacuum over the plant to capture the cloud of adults before treating (sounds odd, but it works).
Why it's stubborn
Whitefly breeds very fast and the eggs and larvae persist on the undersides. That's why you must repeat the treatment several times, without quitting at the first improvement.
How to prevent it
- Yellow traps as a preventive in the garden.
- Check leaf undersides weekly.
- Quarantine new plants.
- In the garden, Encarsia wasps are a very effective biological control.
Combine yellow traps + soap every few days and the white cloud will disappear. Not sure it's whitefly? Upload a photo to the AI diagnosis.
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