At the beginning of spring aphid eggs hatch into nymphs that develop into adult wingless females. These females then produce several generations of similar wingless females and some winged females, which fly away to other plants. This asexual reproduction means aphids colonise plants very quickly taking advantage of the good food supply. At the end of the summer winged females produce males and females (asexually again) which then mate, resulting in eggs that can survive over winter.
