The cabbage white butterfly (Pieris rapae), also known as the cabbage butterfly and the imported cabbageworm, is so named because the larval stage feeds on members of the cabbage family (Cruciferae). This species is found around the world in temperate climates. It was introduced to North America in the 1860's and has since spread throughout the continent. The cabbage white butterfly is known to pollinate several species in the United States.
The cabbage white butterfly has a black body with white wings. The upper wings have a black band at the tip and a black spot in the center of each upper wing. Males have one spot on each wing and females have two. The underneath of the wings are yellowish-green. These butterflies have a wingspan of 30 to 50 mm. Caterpillars are green or bluish-green with a light yellow stripe.