Tussah (tussah; ; tussah

Tussah, LEPIDOPTERA, Bombycidae. In ancient times, it was called wild silkworm and tussah. A silking insect named after its love for oak leaves. Cocoons can be reeled and are mainly used for weaving tussah silk. China is the first country to utilize and reserve tussah. At present, the production of tussah in China is distributed in more than 10 provinces, mainly in Liaoning, Henan, Shandong and other provinces. Tussah is a completely metamorphosed insect, and its first generation goes through four stages: egg, larva, pupa and adult. After four times of sleep and molting. Every molting is 1 time, increasing by 1 year. It takes about 50 days for a silkworm to mature and cocoon at the 5th instar. Spring silkworm eats about 30 ~ 35g leaves in its lifetime and 50 ~ 58g leaves in autumn. Among them, the big gnawing leaves account for more than 80% of the total leaf consumption. The weight of spring silkworm is 14g, and that of autumn silkworm is about 21g. In extreme growth, the weight of this kind of silkworm is about 2000 ~ 3000 times higher than that of ant silkworm. Feeding only in larval stage, overwintering with pupae. The eggs of tussah are heated and hatched indoors, and the larvae are placed on wild tussah trees through artificial management to feed and grow and spin cocoons. At the same time, strengthen management, prevent the harm of birds and animals, and pick cocoons in time. The main diseases of tussah are: tussah nuclear polyhedrosis (tussah purulent disease), tussah microparticle disease, air drying disease, tussah fly disease (myiasis) and nematode disease. Sick silkworms, sick pupae and sick moths should be eliminated in time through strict inspection. Sterilization of silkworm tools, application of chemical agents and breeding of disease-resistant varieties were carried out in egg surface and silkworm room.