The scientific name Philosamia cynthia Walker et Felder Lepidoptera, Bombyxidae. Alias ​​Umbrella has silkworm moth, tussah. Distribution northeast, north, east, southwest. Host walnuts, pomegranates, oranges, ramie, pepper, skunk (Scorpion), black peony, ginkgo, horse laurel, camphor, white orchids, alfalfa, willow and so on. The larvae feed on leaves and buds, and the light leaves are cut into nicks or holes, and the leaves are eaten in severe cases. Morphological characteristics Adult body length 25-30mm, wings 110-130mm. Green-brown. Around the head, the front of the neck plate, the posterior edge of the chest, the back of the abdomen, the lateral lines and the ends are all white. On the back of the abdomen, there were 6 pairs of white markings, and there were intermittent white vertical lines. The fore wing is brown, and the trailing edge of the fore wings is blunt and hook-shaped. The top corner is round and prominent, pinkish purple, with black eye-like spots, and the upper side of the spots is white curved. There is a large crescent-shaped spot in the center of both the front and the rear of the fin. The upper edge of the crescent-shaped spot is dark brown, translucent in the middle, and yellowish at the lower edge; the outer side has a full-wing wide band, the middle band is pink, and the outer side is white. The inner dark brown, base brown, with a white curve at the edge. Eggs are grayish or yellowish-white, with a few dark spots, flat and elliptical, about 1.5mm long. Larval young larvae are yellowish with black spots. After middle age, the whole body was white and green. The mature larvae are 55-75mm long. The body is thick, with symmetrical blue-green spinous processes on the head, chest, and middle chest. The process is slightly inclined backward. The backline is larger than the other two rows, with black dots between the protrusions. The valve screen is light yellow and the valve flap is black. Chest feet yellow, belly-green blue, yellow end. The beak is in a pocket or olive shape and is about 50mm long. The upper end is open, and the two are small in the middle and are made of silky leaves. They are yellowish or grayish white. The shank length is about 40-130mm, and it is often wrapped in half of the leaves of a host. Tan black, 26-30mm long, 14mm wide. Oval shape, more horizontal wrinkles. Life habits are 1-2 years old in the North, 2-3 generations in the South, and the winter is over. In winter in Sichuan, the wintering crickets begin to become adults in late April. Adults have phototaxis, and they have long-distance flying ability. The flight can reach more than 3000m. Feathers emerged immediately after mating. The female moth has a strong attractiveness. Unmated female moths are continuously attracted to the male moths in indoor cages. Female moths can promote mating after cutting off the double wings, and the moths raised indoors are not easy to mate. Adults live for 5 to 10 days. Eggs are produced on the backs and leaves of the host, gathered into a heap or block, each egg produces about 300 eggs, and the egg period is 10-15 days. The newly hatched larvae have a habit of clustering and gradually disperse after 3-4 years of age. On the branches and leaves from the bottom up, stay up late to eat, and can migrate. The first generation larvae were harmed in May and the larvae lasted for about 30 days. After the larvae have been molted, they often eat or leave only a small amount of food. When the larvae are mature, the leaves will grow on the tree. When there are no leaves on the tree, the trees will be brown and rough on the ground. More than 50 days of the second-generation flood season, the end of July and early August are the first generation of adult emergence time. September-November is the second generation of larvae damage period, after the successive larval warts overwintering, the second generation of overwintering lice, up to 5-6 months, urn hidden in the thick pupa. Overwintering often occurs on the twigs of thick bushes such as oranges and pomegranates. On a pomegranate or citrus tree, it can often reach 30 to 40 overwintering lice. Prevention methods (1) Manual capture. After the adult eggs lay or larvae scab, they can be removed by human hand and can also be killed directly. The picked pods can be used for nest silk and oil extraction. (2) Light trapping. Adults have phototaxis, grasp the emergence of adult eclosion period, timely use of black light trapping, can receive a good pest control effect. (3) Chemical control. In the early stage of larvae damage, 90% of trichlorfon was sprayed with 1500-2000 times liquid; 20% of dichlorvos heavy smoke agent was also available, with 0.5-0.7kg per 667m'''''''''''''s and its effects on young larvae were very good. It can also be treated with pyrethrum or rattan extract. (4) Biological control. It has been found that the natural enemies of the larvae of the tussah silkworm are three kinds of ichneumonites, such as T. urticae and Himalayan polyoma, A. cerevisiae, and B. melanogaster. These natural enemies should be well protected and utilized. Absorbent of Carbon Dioxide-Soda lime Co2 Absorbent,Co2 Absorber,Litholyme Co2 Absorbent,Carbolime Co2 Absorbent Zhejiang Hisern Medical Device Co., Ltd , https://www.hisernmedical.com