Silk Worm Life Cycle and Culture at Mohanlal Sukhadiya University Udaipur
The life cycle of silk worms, particularly Bombyx mori, is detailed in this practical study conducted by the Department of Zoology at Mohanlal Sukhadiya University, Udaipur. The process from eggs to larvae, cocoon formation, and the emergence of the adult silk moth is explained. Silk worms feed on mulberry leaves, undergo multiple molts, and eventually spin a cocoon made of raw silk before transforming into a pupa. The cocoon is crucial for protecting the vulnerable pupal stage until the silk moth emerges. Various images depicting different stages of the silk worm life cycle are included in the study.
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Topic Silk Worm Life Cycle & Culture MOHANLAL MOHANLAL SUKHADIYA SUKHADIYA UNIVERSITY UNIVERSITY UDAIPUR UDAIPUR B.Sc.-II-Year Practical Zoology Department Department of Zoology of Zoology By SAHA DEV JAKHAR
Classification Kingdom: Animalia Phylum: Arthropoda Class: Insecta Order: Lepidoptera Family: Bombycidae Genus: Bombyx Species: B. mori
Eggs take about 14 days to hatch into larvae, which eat continuously. They have a preference for white mulberry, having an attraction to the mulberry odorant cis-jasmone. They are not monophagous, since they can eat other species of Morus, as well as some other Moraceae, mostly Osage orange. They are covered with tiny black hairs. When the color of their heads turns darker, it indicates they are about to molt. After molting, the larval phase of the silkworms emerge white, naked, and with little horns on their backs. After they have molted four times, their bodies become slightly yellow, and the skin becomes tighter. The larvae then prepare to enter the pupal phase of their lifecycle, and enclose themselves in a cocoon made up of raw silk produced by the salivary glands. The final molt from larva to pupa takes place within the cocoon, which provides a vital layer of protection during the vulnerable, almost motionless pupal state. Many other Lepidoptera produce cocoons, but only a few the Bombycidae, in particular the genus Bombyx, and the Saturniidae, in particular the genus Antheraea have been exploited for fabric production. Pupa releases proteolytic enzymes to make a hole in the cocoon so it can emerge as an adult moth.
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