Fresh from the egg hatch out of the silkworm baby black like ants, we call "ants", body full of fine hair, about two days after the hair is not obvious. After about 40 minutes after they come out of their shells, the silkworms will have an appetite, and then the feeding process will begin.
Fifth instar larvae need two days and two nights to form a cocoon, the cocoon silk can be drawn up to 1.5km long, the silkworms in the cocoon for the last time to shed their skin and become pupae. About ten days later, it will be transformed into a moth, and break out of the cocoon. After coming out of the cocoon, the female moth sends out a kind of odor from her tail to lure the male moth to cross her tail, and after crossing her tail, the male moth will die, and the female moth will spend about one night to lay about 500 eggs, and then she will also die slowly.
The development process of the silkworm has to go through four periods: fertilized egg-larva-pupa-adult, and there are obvious differences between the larva and the adult in morphology, structure and habits, and the development process like this is called complete metamorphosis. Ming Chen Jiru, "Dashima Festival Huan Yuan Gong (Yuan Keli) Temple": "The ancients ate rice and sacrificed to the first harvest, clothing and silk and sacrificed to the first silkworm."