After hatching, there are two nymphal stages lasting nine to ten days. During these two stages the nymphs feed widely on the plant. Fully- grown second stage nymphs are about 1 mm long. The two nymphal stages are followed by two resting stages (pre-pupal and pupal stages) during which the nymphs congregate towards the end of the underside of leaves. The resting stages last three to five days before adults emerge. The average duration from the time eggs are laid to adults emerging is about two to three weeks.