Description
Mealybugs are pests of the order Hemiptera whose bodies are covered with a white or beige waxy coating. Seen from a distance, a colony of mealybugs looks like a tuft of wool caught on the plant. These inconspicuous white cotton-wool balls hide small crawling insects that look a bit like aphids or spider mites.
They are usually found in the leaf axils, above all at high temperatures and low air humidity.
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Control
With a moderate infestation a soap-and-spirit solution is often effective. If that does not help, you can use a pyrethroid insecticide. Repeat the treatment twice more at 7-day intervals.