The life cycle of silkworm completes in the following four phases:

The life cycle of a silkworm begins from the eggs laid by the mother worm and from these eggs the silkworm larvae are generated after 10 days. The silkworm larva usually eats leaves like mulberry leaves and completes the second stage of the life cycle in 4-6 weeks. In their third stage, they create silk thread shells and remain there for another 3 to 8 days and then create an oval cocoons. The cocoon-stage lasts for around 16 days and they become moth in the final stage. With time the moths become grown-up and recycle the processes again.

Life Cycle of a Silkworm Moth Diagram

Metamorphosis/Life Cycle of the Silkworm (Bombyx Mori) [Silkworm Metamorphosis/Life Cycle]

33. Life cycle of the silkworm—full sheet with details

A highly synchronous infection method of insect cell cultures by artificial germination of environmental spores was developed and revealed the basic mode of the life cycle of silkworm microsporidians in insect cell cultures. Whereas octosporous sporogony of N. sp. NIS-M11 and V. sp. NIS-M12 could be induced in insect cell lines, disporous sporogony appear to be the basic mode of sporogony in Nosema and Vairimorpha species. Primary spore formation and the extrusion of a secondary infective form from primary spores were directly demonstrated in insect cell cultures infected with N. bombycis, and this evidence changed the concept of the sporogonial sequence in microsporidia. Cloning of N. bombycis NIS-001 was accomplished by a limiting dilution method and several clones of N. bombycis NIS-001 have been obtained. Generally, insect cell lines from Lepidoptera are permissive to silkworm microsporidians, and several insect cell cultures infected persistently with silkworm microsporidians have continued for more than 100 passages. However, some cultures infected persistently with silkworm microsporidians last only less than five passages.

Life Cycle of a Silkworm (with Pictures) | eHow

In 1988, Jim Thompson Farm was established on over a 600-rai area of land at the foot of Phaya Prap Hill in Tambon Takob. The Farm is located about twenty-five kilometers from Pak Thongchai District, Nakorn Ratchasima Province where the Jim Thompson Thai Silk weaving factory is located. The farm not only grows mulberry trees whose leaves are used to feed the silkworm larva, but also sells silkworm eggs to the silk-raising cooperative community. The farm then buys the cocoons from its members to produce silk yarn. Since 2001, the farm has become an agro-tourist attraction and is open annually to the public in December. Visitors are enchanted by the farm’s natural and scenic beauty. Here they can gain knowledge about the life cycle of silkworm and enjoy viewing numerous varieties of colorful flowers and vegetables as well as shopping for flowering plants and organic agricultural products.

34. Small version of life cycle of the silkworm for notebook use (4 to a page)
35. Colored version of life cycle of silkworm with NO details—for teacher use

Lifecycle of silkworms - Zanzibar Trading Company

Initially, life cycle of silkworms starts with eggs which are laid by bee on the mulberry leaves. After this stage of cycle it becomes silkworm larva on mulberry leaves. It is then developed into silk thread within 4 to 6 weeks. After the last main stage of life cycle it is transform into cocoon which is necessary to make a silk cloth.

The Life Cycle of the Silkworm

The purpose of the experiment was to learn the lifecycle of silkworm

Molting stage is composed of a series of successive processes including hypodermal cells activating, ecdysial fluid secreting, cuticular chitin and exoskeleton degrading, new epidermis formation, and old epidermis exuviation. The periodic ecdysis primarily orchestrated by ecdysone and juvenile hormone is a distinct characteristic in life cycle of silkworm . Abundant expressions of miRNAs at MLS implicated that miRNAs may be fine-tuning this complicated and transient process. This result also coincides with the expression pattern of bmo-let-7 reported previously , which revealed that the expression level of bmo-let-7 is higher at the beginning of each molt than at other periods. According to our results, bmo-miR-31, its homolog dme-miR-31a is expressed in a pair-rule pattern of 14 stripes and in the foregut, anterior endoderm, and hindgut , and miR-31 was also found to have a high expression level in the small intestine of mammals , which contributes to the tumorigenesis and the acquisition of a more aggressive phenotype in human colorectal cancer . Those findings provided clues that bmo-miR-31 at MLS may control epithelial metabolism during molting. Another MLS-biased miRNA, bmo-miR-278, was also found at MLS, and its homolog dme-miR-278 was proven to control energy homeostasis in Drosophila, since miR-278 mutants have elevated insulin production and elevated circulating sugar . The relatively high expression level suggested that bmo-miR-278, in company with synchronized expressions of bmo-miR-77, bmo-miR-10 and bmo-miR-14, may play a similar role in regulating energy metabolism at molting stage, compromising for the conflict of energy-hungry process and fasting behavior by targeting insulin receptor-like protein precursor (BIR), bombyxin, and BmCF1.

The two given pictures describe the life cycle of silkworm and also illustrate the procedure of silk cloth production.

Life Cycle Of A Silkworm Worksheet - Printable Worksheets

The series below contains photos of the lifecycle of the silkworm. Eachphoto is around 150K in size, so they may take a while to load over a dialupconnection, but should load fairly quickly on broadband. Click on the thumbnail or title to see the larger picture. These photos are courtesy of,a third grade teacher at Alvarado Elementary School, in Union City, California.