Morphological characteristics: adult male moths have gray-brown wings and female moths are gray-white; The front wing is a long, narrow, dark brown dot, in which the front edge is slightly shallow, and the rear edge has yellow-white wavy lines from the wing base to the corner. The front edge of the pattern has three twists and turns. When it stops, the wings cover the back of the body and are shaped like a roof. The wavy lines are composed of three rectangular yellow-white spots with kite lines. The hair on the front wing is very long, and it tilts up like a chicken tail. The egg is oval, light yellow, slightly flat and smooth. Larvae is spindle-shaped, with slender ends, obvious joints, buttocks extending backward, exceeding ventriloquism, turquoise or grayish white, and brown hair. The pupa turns light green at first, and then grayish brown. It is wrapped by online celebrity's sparse cocoon. Most of the cocoons are spindle-shaped, and the pupa's body can be seen outside the cocoon.

Life habit and hazard characteristics: the adult moth glows day and night. The moth overwinters mainly in pupa in the north, but there is no phenomenon of overwintering and mooning in the south. Adults can mate as long as they emerge, and they can mate many times in their lives, overlapping generations. You can lay eggs after mating 1 ~ 2 days, and the egg period is 3 ~ 1 1 day. Super-hatched larvae often bite the epidermis of leaves, drill the first half of their bodies between them and eat mesophyll. Grass-age larvae harm leaves and form transparent spots called "opening skylights" There are holes or holes in the leaves of 3 ~ 4-year-old larvae. In severe cases, the leaves are fed with nets. Stunt concentrated harm to the heart lobe. When the larva is surprised, it wriggles, retreats, and spins down.

Prevention methods: agricultural control: rational distribution, avoiding annual continuous cropping of cruciferous vegetables in a small range, and rationally deploying and cultivating early, middle and late-maturing varieties of Chinese cabbage. Biological control: suitable for bacterial pesticides. For example, each gram contains1000 billion spores of insecticidal bacteria, entomogenous fungi 140, Bt powder, etc., with 500~l000 times dilution and 0. 1% detergent. Chemical control: 50% Bataan Humidifying Powder 1000 ~ 1500 times dilution, 50% Cindion EC 2000 times dilution, 10% Insecticide Powder EC 2000 ~ 2500 times dilution, or 50% Moth Red Oil 700 ~/KLOC-.