Pieris rapae Linne, Lepidoptera, Pieris rapae. Cabbage butterfly, another famous dish, is also called cabbage butterfly. [1] The adult is 12 ~ 20mm in length, 45 ~ 55mm in wing spread, black in body, with white and grayish black hair on the chest and white wings. The front edge and base of the female's front wing are mostly black, and there are 1 large triangular black spots at the top corner, and there are two black circular spots on the outside of the middle room, which are side by side. The tail is grayish black at the base, and there are 1 black spots at the leading edge. When the wing is deployed, it is connected with the black spot behind the front wing. Complete deformation and development of the genus Papilio. The main hosts are plants of 9 families, such as Cruciferae, Compositae and Convolvulaceae, which mainly harm cruciferous vegetables, especially kale, cabbage and cauliflower.